terça-feira, 1 de abril de 2014

A Historian Looks Back: The Calculus as Algebra and Selected Writings

(Spectrum)

Judith V. Grabiner

 Mathematical Association of America |  2010 |304 páginas | rar - pdf | 1,7 Mb

link (password: matav)

Judith Grabiner, the author of A Historian Looks Back, has long been interested in investigating what mathematicians actually do, and how mathematics actually has developed. She addresses the results of her investigations not principally to other historians, but to mathematicians and teachers of mathematics. This book brings together much of what she has had to say to this audience.
The centerpiece of the book is The Calculus as Algebra: J.-L. Lagrange, 1736-1813. The book describes the achievements, setbacks, and influence of Lagrange s pioneering attempt to reduce the calculus to algebra. Nine additional articles round out the book describing the history of the derivative; the origin of delta-epsilon proofs; Descartes and problem solving; the contrast between the calculus of Newton and Maclaurin, and that of Lagrange; Maclaurin s way of doing mathematics and science and his surprisingly important influence; some widely held myths about the history of mathematics; Lagrange s attempt to prove Euclid s parallel postulate; and the central role that mathematics has played throughout the history of western civilization.
The development of mathematics cannot be programmed or predicted. Still, seeing how ideas have been formed over time and what the difficulties were can help teachers find new ways to explain mathematics. Appreciating its cultural background can humanize mathematics for students. And famous mathematicians struggles and successes should interest -- and perhaps inspire -- researchers. Readers will see not only what the mathematical past was like, but also how important parts of the mathematical present came to be.

Contents
Introduction .. . . xi
Part I. The Calculus as Algebra .. . . .1
Preface to the Garland Edition .. .3
Acknowledgement. . . .7
Introduction . . . . .9
1. The Development of Lagrange’s Ideas on the Calculus: 1754–1797 .. . 17
2. The Algebraic Background of the Theory of Analytic Functions . . . 37
3. The Contents of the Fonctions Analytiques . . . 63
4. From Proof-Technique to Definition: The Pre-History of Delta-Epsilon Methods . . 81
Conclusion .  . . .101
Appendix . .103
Bibliography .. . .105
Part II. Selected Writings  . .125
1. The Mathematician, the Historian, and the History of Mathematics . . . .127
2. Who Gave You the Epsilon? Cauchy and the Origins of Rigorous Calculus∗ . . . 135
3. The Changing Concept of Change: The Derivative from Fermat to Weierstrass† . . 147
4. The Centrality of Mathematics in the History of Western Thought† . . . 163
5. Descartes and Problem-Solving† . . . .175
6. The Calculus as Algebra, the Calculus as Geometry: Lagrange, Maclaurin, and Their Legacy . .191
7. Was Newton’s Calculus a Dead End? The Continental Influence of Maclaurin’s Treatise of Fluxions∗ . . 209
8. Newton, Maclaurin, and the Authority of Mathematics∗ .. .229
9. Why Should Historical Truth Matter to Mathematicians? Dispelling Myths while PromotinMaths . . .243
10. Why Did Lagrange “Prove” the Parallel Postulate?∗ .  . 257
Index .. . 275
About the Author .  . .287

segunda-feira, 31 de março de 2014

Mathematics Galore!, The First Five Years of the St. Mark’s Institute of Mathematics


 (Classroom Resource Materials)

James Tanton 


Mathematical Association of America | 2012 | 289 | pdf | 3,3 Mb


link



Mathematics Galore! Showcases some of the best activities and student outcomes of the St. Mark s Institute of Mathematics and invites you to engage the mathematics yourself! Revel in the delight of deep intellectual play and marvel at the heights to which young scholars can rise. See some great mathematics explained and proved via natural and accessible means.
Based on 26 essays ( newsletters ) and eight additional pieces,Mathematics Galore! offers a large sample of mathematical tidbits and treasures, each immediately enticing, and each a gateway to layers of surprising depth and conundrum. Pick and read essays in no particular order and enjoy the mathematical stories that unfold. Be inspired for your courses, your math clubs and your math circles, or simply enjoy for yourself the bounty of research questions and intriguing puzzlers that lie within.

Contents
Introduction;
Newsletters and commentaries;
1. Arctangents;
2. Benford's Law;
3. Braids;
4. CLIP Theory;
5. Dots and dashes;
6. Factor trees;
7. Folding fractions and conics;
8. Folding patterns and dragons;
9. Folding and pouring;
10. Fractions;
11. Integer triangles;
12. Lattice polygons;
13. Layered tilings;
14. The middle of a triangle;
15. Partitions;
16. Personalized polynomials;
17. Playing with Pi;
18. Pythagoras's Theorem;
19. On reflection;
20. Repunits and primes;
21. The Stern-Brocot Tree;
22. Tessellations;
23. Theon's ladder and squangular numbers;
24. Tilings and theorems;
25. The Tower of Hanoi;
26. Weird multiplication;
Appendices:
1. Numbers that are the sum of two squares;
2. Pick's theorem;
3. The Mobius function;
4. The Borsuk-Ulam theorem;
5. Galilean ratios;
6. A candy-sharing game;
7. Bending Buffon's needle;
8. On separating dots;
Indexes:
1. Index of terms;
2. Index of topics;
3. Classic theorems proved.


Outros livros do mesmo autor:



MPJ's Ultimate Math Lessons



Chris Shore

Math Projects Journal | 2011 | 294 páginas | rar - pdf | 22 Mb


link (password : matav)

MPJ's Ultimate Math Lessons is a resource for teachers of Algebra, Pre-Algebra, and Geometry in grades 6–12. It contains 80 innovative lessons and 27 thought-provoking articles taken directly from theMath Projects Journal, a periodical that, for more than six years, has helped teachers around the world improve student performance in mathematics.

Contents
Introduction
The MPJ Story
Acknowledgements
PRE-ALGEBRA LESSONS
How Big is Barbie
M&M Count and Crunch
Counting Fish
Donlt Break my Stride
4-Digit Problem
Wallflowers
The Postman Always Rings Twice
Piggy Banks
Candy Bars
Brownies
Beef Jerky
Playing with a Full Deck
ALGEBRA LESSONS
Number Tricks
11m Thinking of a Number...
Pig Pen Algebra
Rule Quest
Rising Water
The Student-Generated Word Problem
Algebra Walk
Staircases & Ramps
Tumbling Cars
Monster Cars
The Jogging Hare
CoolShoes.com
Land Cruiser
Stixture Problems
The Tortoise and The Hare
Rescue Mission
The X-Files
Olympic Swim Times
Robotic Disney
The Migratory Paths of Birds
Empty Box
The Pizza Box
Pool Decks
The Coin Fountain
Parabolic Pizza
Town Grid
The Billabong and the Bush
Zeno's Bouncing Ball
Calculator Logos
Original Works
GEOMETRY LESSONS
How High: Beyond a Shadow of a Doubt
How High: The Right Stuff
How High: Surveyor1s Trig Trick
How High: Do You Have the Inclination?
How High: The Chinese Difference
The Mason's Secret
The America1s Cup Sail
The Fire-Fish Story
Baseball Congruency
Shipping Conundrum
The Gum Drop
A Slice of Pi
Poison Weed
Polygon House
Swimming Pools
King Tut
The Luxor
The Shopkeeper1s Jar
Super Size ItI
Can There Be Giants?
Whatever Floats Your Boat
Shot Put Arc
Strike a Chord
Reflection Golf
Kaleidoscope
William Tell
The Selling of America
The Vector Map
Princess Dido and the Ox Skin
ARTICLES
QM14.5
TIMSS: A Call for Substance
TIMSS: A Tale of Three Countries
TIMSS: A TIMSS Primer
A Mountain of Vision
Portfolios
A Struggle Among Equals
Nuts & Bolts
Kicking the Habit
On a Good Day
Sleeping with the Enemy
Inside & Out
Measurement
Teaching Backwards
Ultimate Cosmic Power
Cannonballs and Concepts
Graphing for Meaning
Beavis and Barbie
Still All Full of Stuffinl
Godzilla or Godzuki
Sculpting Young Thinkers
Christmas Carols and Disco Tunes
Martian Math
The Economy of Thought
Universal Remote
The Railroad and the Kayak
Fluff-n-Stuff
Lesson Studies
Inspiration, Perspiration, Desperation
ADDITIONAL ACTIVITIES
The Dentists Puzzle
Psychic Probability
Around the World
Red Dot - Green Dot
The Tic-Tac Equation
The Handyman's Math Trick
Brother in the Box
Mega Translation
Age Trick
Math Walk
Twenty-One
Wipeout
Index

New Foundations for Physical Geometry: The Theory of Linear Structures

 
Tim Maudlin

Oxford University Press | 2014 | 374 páginas | rar - pdf | 1,94 Mb


link (password: matav)


Topology is the mathematical study of the most basic geometrical structure of a space. Mathematical physics uses topological spaces as the formal means for describing physical space and time. This book proposes a completely new mathematical structure for describing geometrical notions such as continuity, connectedness, boundaries of sets, and so on, in order to provide a better mathematical tool for understanding space-time. This is the initial volume in a two-volume set, the first of which develops the mathematical structure and the second of which applies it to classical and Relativistic physics.
The book begins with a brief historical review of the development of mathematics as it relates to geometry, and an overview of standard topology. The new theory, the Theory of Linear Structures, is presented and compared to standard topology. The Theory of Linear Structures replaces the foundational notion of standard topology, the open set, with the notion of a continuous line. Axioms for the Theory of Linear Structures are laid down, and definitions of other geometrical notions developed in those terms. Various novel geometrical properties, such as a space being intrinsically directed, are defined using these resources. Applications of the theory to discrete spaces (where the standard theory of open sets gets little purchase) are particularly noted. The mathematics is developed up through homotopy theory and compactness, along with ways to represent both affine (straight line) and metrical structure.
ContentsAcknowledgments x
Introduction 1
Metaphorical and Geometrical Spaces 6
A Light Dance on the Dust of the Ages 9
The Proliferation of Numbers 12
Descartes and Coordinate Geometry 14
John Wallis and the Number Line 16
Dedekind and the Construction of Irrational Numbers 20
Overview and Terminological Conventions 25
1. Topology and Its Shortcomings 28
Standard Topology 31
Closed Sets, Neighborhoods, Boundary Points, and Connected Spaces 33
The Hausdorff Property 36
Why Discrete Spaces Matter 45
The Relational Nature of Open Sets 47
The Bill of Indictment (So Far) 49
2. Linear Structures, Neighborhoods, Open Sets 54
Methodological Morals 54
The Essence of the Line 57
The (First) Theory of Linear Structures 59
Proto-Linear Structures 69
Discrete Spaces, Mr Bush’s Wild Line, the Woven Plane, and the Affine Plane 74
A Taxonomy of Linear Structures 79
Neighborhoods in a Linear Structure 81
Open Sets 85
Finite-Point Spaces 86
Return to Intuition 89
Directed Linear Structures 92
Linear Structures and Directed Linear Structures 96
Neighborhoods, Open Sets, and Topologies Again 97
Finite-Point Spaces and Geometrical Interpretability 99
A Geometrically Uninterpretable Topological Space 103
Segment-Spliced Linear Structures 104
Looking Ahead 107
Exercises 107
Appendix: Neighborhoods and Linear Structures 108
3. Closed Sets, Open Sets (Again), Connected Spaces 113
Closed Sets: Preliminary Observations 113
Open and Closed Intervals 114
IP-closed and IP-open Sets 115
IP-open Sets and Open Sets, IP-closed Sets and Closed Sets 117
Zeno’s Combs 120
Closed Sets, Open Sets, and Complements 123
Interiors, Boundary Points, and Boundaries 127
Formal Properties of Boundary Points 136
Connected Spaces 140
Chains and Connectedness 143
Directedness and Connectedness 148
Exercises 150
4. Separation Properties, Convergence, and Extensions 152
Separation Properties 152
Convergence and Unpleasantness 155
Sequences and Convergence 160
Extensions 163
The Topologist’s Sine Curve 165
Physical Interlude: Thomson’s Lamp 168
Exercises 172
5. Properties of Functions 174
Continuity: an Overview 174
The Intuitive Explication of Continuity and Its Shortcomings 175
The Standard Definition and Its Shortcomings 178
What the Standard Definition of “Continuity” Defines 183
The Essence of Continuity 186
Continuity at a Point and in a Direction 190
An Historical Interlude 192
Remarks on the Architecture of Definitions; Lineal Functions 194
Lines and Continuity in Standard Topology 199
Exercises 201
6. Subspaces and Substructures; Straightness and Differentiability 203
The Geometrical Structure of a Subspace: Desiderata 203
Subspaces in Standard Topology 205
Subspaces in the Theory of Linear Structures 206
Substructures 211
One Way Forward 218
Euclid’s Postulates and the Nature of Straightness 220
Convex Affine Spaces 227
Example: Some Conical Spaces 233
Tangents 235
Upper and Lower Tangents, Differentiability 244
Summation 253
Exercises 254
7. Metrical Structure 256
Approaches to Metrical Structure 256
Ratios Between What? 258
The Additive Properties of Straight Lines 260
Congruence and Comparability 262
Eudoxan and Anthyphairetic Ratios 274
The Compass 280
Metric Linear Structures and Metric Functions 285
Open Lines, Curved Lines, and Rectification 287
Continuity of the Metric 291
Exercises 294
Appendix: A Remark about Minimal Regular Metric Spaces 294
8. Product Spaces and Fiber Bundles 297
New Spaces from Old 297
Constructing Product Linear Structures 300
Examples of Product Linear Structures 303
Neighborhoods and Open Sets in Product Linear Structures 307
Fiber Bundles 309
Sections 313
Additional Structure 315
Exercises 318
9. Beyond Continua 320
How Can Continua and Non-Continua Approximate Each Other? 320
Continuous Functions 321
Homotopy 334
Compactness 339
Summary of Mathematical Results and Some Open Questions 345
Exercises 346
Axioms and Definitions 347

Bibliography 358
Index 361

Caliban's Problem Book: Mathematical, Inferential and Cryptographic Puzzles

Hubert C. Phillips

 Dover Publications | 1961 | 191 páginas | djvu | 1,4 Mb


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The SimCalc Vision and Contributions: Democratizing Access to Important Mathematics


 (Advances in Mathematics Education, 4)

Stephen J. Hegedus e Jeremy Roschelle

 Springer | 2013 | 471 páginas | rar - pdf | 9 Mb

link (password : matav)

This volume provides essential guidance for transforming mathematics learning in schools through the use of innovative technology, pedagogy, and curriculum. It presents clear, rigorous evidence of the impact technology can have in improving students learning of important yet complex mathematical concepts - and goes beyond a focus on technology alone to clearly explain how teacher professional development, pedagogy, curriculum, and student participation and identity each play an essential role in transforming mathematics classrooms with technology. Further, evidence of effectiveness is complemented by insightful case studies of how key factors lead to enhancing learning, including the contributions of  design research, classroom discourse, and meaningful assessment. 
The volume organizes over 15 years of sustained research by multiple investigators in different states and countries who together developed an approach called "SimCalc" that radically transforms how Algebra and Calculus are taught.
The SimCalc program engages students around simulated motions, such as races on a soccer field, and builds understanding using visual representations such as graphs, and familiar representations such as stories to help students to develop meaning for more abstract mathematical symbols. Further, the SimCalc program leverages classroom wireless networks to increase participation by all students in doing, talking about, and reflecting on mathematics. Unlike many technology programs, SimCalc research shows the benefits of balanced attention to curriculum, pedagogy, teacher professional development, assessment and technology - and has proven effectiveness results at the scale of hundreds of schools and classrooms.
Combining the findings of multiple investigators in one accessible volume reveals the depth and breadth of the research program, and engages readers interested in:
*        Designing innovative curriculum, software, and professional development
·         Effective uses of technology to improve mathematics education
*        Creating integrated systems of teaching that transform mathematics classrooms
*        Scaling up new pedagogies to hundreds of schools and classrooms
*       Conducting research that really matters for the future of mathematics learning


*        Engaging students in deeply learning the important concepts in mathematics

Contents
Part I Philosophy & Background
Ubiratan D’Ambrosio
Introduction: Major Themes, Technologies, and Timeline  . 5
Jeremy Roschelle and Stephen Hegedus
The Mathematics of Change and Variation from a Millennial Perspective: New Content, New Context .. 13
James J. Kaput and Jeremy Roschelle
From Static to Dynamic Mathematics: Historical and Representational Perspectives . .. 27
Luis Moreno-Armella and Stephen Hegedus
Intersecting Representation and Communication Infrastructures .. . 47
Stephen Hegedus and Luis Moreno-Armella
Part II Aspects of Design
Reflections on Significant Developments in Designing SimCalc Software . 65
James Burke, Stephen Hegedus, and Ryan Robidoux
Designing for Generative Activities: Expanding Spaces for Learning and Teaching . . . . 85
Nancy Ares
SimCalc and the Networked Classroom . . .. . 99
Corey Brady, Tobin White, Sarah Davis, and Stephen Hegedus
Part III Impacts from Large-Scale Research
Jinfa Cai
SimCalc at Scale: Three Studies Examine the Integration of Technology, Curriculum, and Professional Development for Advancing Middle School Mathematics .  . 125
Jeremy Roschelle and Nicole Shechtman
Learning and Participation in High School Classrooms . . 145
Sara Dalton and Stephen Hegedus
Development of Student and Teacher Assessments in the Scaling Up SimCalc Project  . 167
Nicole Shechtman, Geneva Haertel, Jeremy Roschelle, Jennifer Knudsen, and Corinne Singleton
Sustainable Use of Dynamic Representational Environments: Toward a District-Wide Adoption of SimCalc-Based Materials . . 183
Phil Vahey, George J. Roy, and Vivian Fueyo
Impact of Classroom Connectivity on Learning and Participation .  203
Stephen Hegedus, Luis Moreno-Armella, Sara Dalton, Arden Brookstein, and John Tapper
Part IV Impacts from Small-Scale Research
Mathematical Discourse as a Process that Mediates Learning in SimCalc Classrooms . . 233
Jessica Pierson Bishop
Scaling Up Innovative Mathematics in the Middle Grades: Case Studies of “Good Enough” Enactments .  . . 251
Susan B. Empson, Steven Greenstein, Luz Maldonado, and Jeremy Roschelle
Changing from the Inside Out: SimCalc Teacher Changes in Beliefs and Practices . . 271
John Tapper
Connection Making: Capitalizing on the Affordances of Dynamic Representations Through Mathematically Relevant Questioning . . 285
Chandra Hawley Orrill
“They Need to Be Solid in Standard Skills First”: How Standards Can Become the Upper Bound  299
Margaret Dickey-Kurdziolek and Deborah Tatar
Part V International Contributions
Developing and Enhancing Elementary School Students’ Higher Order Mathematical Thinking with SimCalc .  319
Demetra Pitta-Pantazi, Paraskevi Sophocleous, and Constantinos Christou Adapting SimCalc to Different School Mathematics Cultures: A Case Study from Brazil . . 341
Rosana Nogueira de Lima, Lulu Healy, and Tânia M.M. Campos
Mathematical Modeling with SimCalc: Enhancing Students’ Complex Problem Solving Skills Using a Modeling Approach . . . 363
Nicholas G. Mousoulides
Approaching Calculus with SimCalc: Linking Derivative and Antiderivative . . . 383
Patricia Salinas
Part VI Extensions, Commentaries, & Future Visions
You Can Lead a Horse to Water: Issues in Deepening Learning Through Deepening Teaching .. 403
John Mason
Modeling as a Means for Making Powerful Ideas Accessible to Children at an Early Age . 419
Richard Lesh, Lyn English, Serife Sevis, and Chanda Riggs
The Kaputian Program and Its Relation to DNR-Based Instruction: A Common Commitment to the Development of Mathematics with Meaning .  437
Guershon Harel
The Evolution of Technology and the Mathematics of Change and Variation: Using Human Perceptions and Emotions to Make Sense of Powerful Ideas . .449
David Tall
Conversation About SimCalc, Its Evolution and Lessons Along the Way . 463
Eric Hamilton and Nora Sabelli
Index . . . 475

Wizards, aliens, and starships : physics and math in fantasy and science fiction

Charles L. Adler

Princeton University Press | 2014 | 392 páginas | rar - epub | 2,05 Mb

link (password: matav)

(novo formato)

Wizards, Aliens, and Starships will speak to anyone wanting to know about the correct--and incorrect--science of science fiction and fantasy.



From teleportation and space elevators to alien contact and interstellar travel, science fiction and fantasy writers have come up with some brilliant and innovative ideas. Yet how plausible are these ideas--for instance, could Mr. Weasley's flying car in the Harry Potter books really exist? Which concepts might actually happen, and which ones wouldn't work at all? Wizards, Aliens, and Starships delves into the most extraordinary details in science fiction and fantasy--such as time warps, shape changing, rocket launches, and illumination by floating candle--and shows readers the physics and math behind the phenomena.
With simple mathematical models, and in most cases using no more than high school algebra, Charles Adler ranges across a plethora of remarkable imaginings, from the works of Ursula K. Le Guin to Star Trek and Avatar, to explore what might become reality. Adler explains why fantasy in the Harry Potter and Dresden Files novels cannot adhere strictly to scientific laws, and when magic might make scientific sense in the muggle world. He examines space travel and wonders why it isn't cheaper and more common today. Adler also discusses exoplanets and how the search for alien life has shifted from radio communications to space-based telescopes. He concludes by investigating the future survival of humanity and other intelligent races. Throughout, he cites an abundance of science fiction and fantasy authors, and includes concise descriptions of stories as well as an appendix on Newton's laws of motion.

CONTENTS
1 PLAYING THE GAME 1
1.1 The Purpose of the Book 1
1.2 The Assumptions I Make 3
1.3 Organization 4
1.4 The Mathematics and Physics You Need 5
1.5 Energy and Power 6
I POTTER PHYSICS 11
2 HARRY POTTER AND THE GREAT CONSERVATION LAWS 13
2.1 The Taxonomy of Fantasy 13
2.2 Transfiguration and the Conservation of Mass 14
2.3 Disapparition and the Conservation of Momentum 16
2.4 Reparo and the Second Law of Thermodynamics 21
3 WHY HOGWARTS IS SO DARK 27
3.1 Magic versus Technology 27
3.2 Illumination 28
4 FANTASTIC BEASTS AND HOW TO DISPROVE THEM 38
4.1 Hic sunt Dracones 38
4.2 How to Build a Giant 39
4.3 Kleiber’s Law, Part 1: Mermaids 45
4.4 Kleiber’s Law, Part 2: Owls, Dragons, Hippogriffs, and Other Flying Beasts 49
II SPACE TRAVEL 57
5 WHY COMPUTERS GET BETTER AND CARS CAN’T (MUCH) 59
5.1 The Future of Transportation 59
5.2 The Reality of Space Travel 61
5.3 The Energetics of Computation 63
5.4 The Energetics of the Regular and the Flying Car 64
5.5 Suborbital Flights 68
6 VACATIONS IN SPACE 71
6.1 The Future in Science Fiction: Cheap, Easy Space Travel? 71
6.2 Orbital Mechanics 74
6.3 Halfway to Anywhere: The Energetics of Spaceflight 74
6.4 Financing Space Travel 82
7 SPACE COLONIES 86
7.1 Habitats in Space 86
7.2 O’Neill Colonies 87
7.3 Matters of Gravity 89
7.4 Artificial “Gravity” on a Space Station 93
7.5 The Lagrange Points 103
7.6 Off-Earth Ecology and Energy Issues 106
7.7 The Sticker Price 112
8 THE SPACE ELEVATOR 115
8.1 Ascending into Orbit 115
8.2 The Physics of Geosynchronous Orbits 116
8.3 What Is a Space Elevator, and Why Would We Want One? 118
8.4 Why Buildings Stand Up—or Fall Down 119
8.5 Stresses and Strains: Carbon Nanotubes 122
8.6 Energy, “Climbers,” Lasers, and Propulsion 123
8.7 How Likely Is It? 125
8.8 The Unapproximated Elevator 127
9 MANNED INTERPLANETARY TRAVEL 130
9.1 It’s Not an Ocean Voyage or a Plane Ride 130
9.2 Kepler’s Three Laws 131
9.3 The Hohmann Transfer Orbit 134
9.4 Delta v and All That 136
9.5 Getting Back 137
9.6 Gravitational Slingshots and Chaotic Orbits 138
9.7 Costs 142
10 ADVANCED PROPULSION SYSTEMS 145
10.1 Getting There Quickly 145
10.2 Why Chemical Propulsion Won’t Work 146
10.3 The Most Famous Formula in Physics 147
10.4 Advanced Propulsion Ideas 148
10.5 Old “Bang-Bang”: The Orion Drive 153
10.6 Prospects for Interplanetary Travel 155
11 SPECULATIVE PROPULSION SYSTEMS 157
11.1 More Speculative Propulsion Systems 157
11.2 Mass Ratios for Matter-Antimatter Propulsion Systems 168
11.3 Radiation Problems 173
12 INTERSTELLAR TRAVEL AND RELATIVITY 176
12.1 Time Enough for Anything 176
12.2 Was Einstein Right? 178
12.3 Some Subtleties 182
12.4 Constant Acceleration in Relativity 184
13 FASTER-THAN-LIGHT TRAVEL AND TIME TRAVEL 188
13.1 The Realistic Answer 188
13.2 The Unrealistic Answer 188
13.3 Why FTL Means Time Travel 190
13.4 The General Theory 193
13.5 Gravitational Time Dilation and Black Holes 195
13.6 Wormholes and Exotic Matter 198
13.7 The Grandfather Paradox and Other Oddities 205
III WORLDS AND ALIENS 215
14 DESIGNING A HABITABLE PLANET 217
14.1 Adler’s Mantra 218
14.2 Type of Star 221
14.3 Planetary Distance from Its Star 226
14.4 The Greenhouse Effect 229
14.5 Orbital Eccentricity 232
14.6 Planetary Size and Atmospheric Retention 233
14.7 The Anna Karenina Principle and Habitable Planets 237
14.8 Imponderables 239
15 THE SCIENTIFIC SEARCH FOR SPOCK 242
15.1 Exoplanets and Exoplants 242
15.2 Doppler Technique 246
15.3 Transits and the Kepler Mission 249
15.4 The Spectral Signatures of Life 250
15.5 Alien Photosynthesis 251
16 THE MATHEMATICS OF TALKING WITH ALIENS 255
16.1 Three Views of Alien Intelligences 255
16.2 Motivation for Alien Contact 259
16.3 Drake-Equation Models and the Mathematics of Alien Contact 267
IV YEAR GOOGOL 273
17 THE SHORT-TERM SURVIVAL OF HUMANITY 275
17.1 This Is the Way the World Will End 275
17.2 The Short-Term: Man-Made Catastrophes 275
18 WORLD-BUILDING 292
18.1 Terraforming 292
18.2 Characteristics of Mars 294
18.3 Temperature and the Martian Atmosphere 295
18.4 Atmospheric Oxygen 299
18.5 Economics 301
19 DYSON SPHERES AND RINGWORLDS 303
19.1 Dyson’s Sphere 303
19.2 The Dyson Net 305
19.3 Niven’s Ringworld 311
19.4 The Ringworld, GPS, and Ehrenfest’s Paradox 318
19.5 The Ringworld Is Unstable! 320
19.6 Getting There from Here—and Do We Need To? 324
20 ADVANCED CIVILIZATIONS AND THE KARDASHEV SCALE 326
20.1 The Kardashev Scale 326
20.2 Our Type 0.7 Civilization 327
20.3 Type I Civilizations 329
20.4 Moving Upward 331
20.5 Type II Civilizations 332
20.6 Type III Civilizations 334
21 A GOOGOL YEARS 336
21.1 The Future of the Future 336
21.2 The “Short Term”: Up to 500 Million Years or so 336
21.3 The “Medium Term”: Up to about 1013 Years 338
21.4 The “Long Term”: Up to a Googol Years 341
21.5 Black Hole–Powered Civilizations 344
21.6 Protons Decay—or Do They? 346
21.7 A Googol Years—All the Black Holes Evaporate 346
21.8 Our Last Bow 349
Acknowledgments 351
Appendix: Newton’s Three Laws of Motion 353
Bibliography 359
Index 371