Math 3135 Sarah Lawrence College

What are Numbers? A Narrative of 30,000 years and counting...

Course:  Math 3135, Spring 2017

Time & Place:  MW 3:30 – 5:00 pm (SC 201)

Instructor:  Jorge Basilio (jbasilio@sarahlawrence.edu)

Office Hours:

Handouts

Winger & Abbott's essays

On Reading Mathematics

Reaction/Reflection Pieces

Announcements

Final Conference Work Submission Instructions

It’s that exciting time of the semester where we are almost done and we get to compile our efforts into a final document. To guarantee the final submission looks professional, please follow these instructions. I can’t wait to read your work!

Other notes:
(i) Make sure that the font is the same for the entire document.
(ii) Typing this up using LaTeX is highly recommended, but I decided not to require it.
If you want info on LaTeX, see: Professor Ethan Bloch's LaTeX website

If you have any questions, please do not hesitate to ask!

Borges'

Readings added--see schedule for link!

Medieval Universe

Unknown artist. Read about it
Flammarion-color

Archimedes'

Sand Reckoner added--see schedule for link!

Ancient Number Systems

handouts added--see schedule link!

Videos & Readings

Videos & Readings for first day of class added to the schedule

Hello!

Welcome to "What are Numbers?"!
I'll post important information here.
I posted the course syllabus below--for students who have not taken a course with me please read it carefully.
More info coming soon...

Week        Class Hand-in homework Due    
1
{1/23 & 1/25}
{M} Class introductions;
Read this (Documentary of Number One) & watch this (Monty Python + Math + History = Awesome)

This is a nice overview of basics
Watch: What makes us human?; Watch: A Murder of Crows, TED talk shorter version;

{W} Read [#] Ch 1, 2
2
{1/30 & 1/31}
{M} Read [#] Ch 3, 4;
{W} Continue to discuss [#] Ch 3, 4
3
{2/7 & 2/9}
{M} Read [NoMath] Ch 1, 2;
{W} Read [Civ] Ch 1 only 1.1-1.3!
3 HHW 1 2-8-17 @ 9 pm
4
{2/21 & 2/23}
{M} Continue with ancient number systems: [No RP due today :P]
Egyptian;
Roman;
Babylonian;
Greek;
{W} Read [Civ] Ch 1.4
5
{2/13 & 2/15}
{M} Read [Civ] Ch 1.5;
{W} Read [Civ] Ch 1.6, 1.7;
6
{2/28 & 3/2}
{M} Read [Civ] Ch 2;
{W} Read [Civ] Ch 3
7
{3/6 & 3/8}
{M} Read [#] Ch 5. Also, some from [Civ] Ch 3;
{W} Read [#] Ch 6
3 HHW 2 3-8-17 @ 9 pm
8
{3/27 & 3/29}
{M} Read [#] Ch 7, 8
{W} Read [#] Ch 9, 10
9
{4/3 & 4/5}
{M} Discussed complex numbers (some of Ch 10): visual and algebraic interpretations
{W} Archimedes’ Sand Reckoner (or another link: this link has some commentary before the work)
10
{4/10 & 4/12}
{M} Read [0]: Ch 0, 1, 2, 3;
{W} Class canceled due to illness
10 HHW 3 4-10-17 @ 9 pm
11
{4/17 & 4/19}
{M} Read [0]: Ch 4, 5;
{W} Read [0]: Ch 6, 7, 8
12
{4/24 & 4/26}
{M} Read [0] Ch ∞, Appendices;
{W} Bonus class on Cardinality and Sizes of Infinity (No RP due)
13
{5/1 & 5/3}
{M} Borges readings:
The Aleph & Library of Babel;
{W} More discussion of Borges. Calculations from Library of Babel.
13 HHW 4 5-3-17 @ 9 pm
14
{5/8 & 5/10}
{M} Winger’s “The Unreasonable Effectiveness of Mathematics in the Natural Sciences” & Abbott’s “The Reasonable Ineffectivenss of Mathematics”;
{W — Last day of class} Conference Project Presentations! Please prepare a 5 to 10 minute presentation that summarizes what your project was.
14 HHW 5 5-12-17 @ 9 pm

Course Policies

Please consult the Course Syllabus for a more detailed description.

Prerequisites

High-school algebra and geometry is required; high-school trigonometry is recommended. Though curiosity and desire to learn are far more important.

Hand-in Homework

There will be homework assignments consisting of various types of problems or tasks. Some might be straight-forward calculations, others might me short-essays and free-response. You are encouraged to work with other students in solving the homework problems, but you should write your own solutions, and you must acknowledge anyone that you work with. Your solutions should be written clearly and in complete sentences, with enough detail that another student in the class would be able to follow your reasoning.

Required Texts

What is this class?

Have you ever wondered what constitutes numbers? Are they real or imagined? Did we discover or create them? What is innity? These fundamental questions have been an inexhaustible source of inspiration to countless thinkers, poets and artists. We will begin our story in 30,000 B.C., about 27,000 years before the dawn of civilization, with primitive forms of counting. We will then jump forward to the fertile crescent region to study the various forms of number systems and symbols of the ancient Babylonians, Egyptians and Greeks. We’ll continue with a study of arithmetic using whole numbers (1,2,...), rational numbers (fractions) and the algebra and geometry associated to them from various viewpoints from antiquity to modernity. Along the way, we’ll learn the story of “0” and why the Pythagoreans would kill to defend the secret of the discovery that √2 was not a (rational) number! We’ll explore how the “real numbers” are innitely complex and how the “complex numbers” are just as real as any other mathematical object. In the second part of the course, we’ll begin a cultural study of innity where we’ll puzzle over numerous paradoxes and learn that, in fact, modern mathematicians are perfectly comfortable with the idea that there isn’t just one innity. Time permitting, and according to the tastes and wishes of the class, we can discuss how to logically and rigorously construct the natural numbers and prove theorems such as: 1+1=2. By the end of our course, we will have caught up to the current perspectives on the concept of numbers and learn that this narrative is far from over.

Above all, the search for an answer to “what are numbers?” is a good story about humanity. And you’ll be an active participant. Not only will we learn from various sources of reading materials, but we will actively explore and “play” with various problems for ourselves and (re-) discover many gems of insight in seminar and assignments. Conference work will be allocated to clarifying course ideas and exploring additional mathematical or philosophical topics.

Thematic Outline

Part 0: Pre-History & Number Sense

How far back does the story go? Can animals count? & more.

Part 1: Ancient Number Systems

We’ll learn how to count and express numbers in ancient Egyptian, Babylolian, and Summarian number systems. The goal here is to be procient enough so that if we traveled back in time to these civilizations, we’d nd work as accountants ;-)

Additional systems will be explored in the assignments and/or conference work.

Part 2: Abstraction, Part I: From Counting Numbers to Imaginary Numbers

The Five W’s of zero, negative numbers, fractions, real and complex numbers. Additional numbers will be explored in the assignments and/or in conference work.

Part 3: Abstraction, Part II: Towers of Innity

We’ll discuss innity in detail from multiple perspectives from mathematical, cultural, philosophical, geometric and artistic.

Part 4: Literary Interlude

Numbers in literature. We’ll read two stories from my compatriot Jorge Luis Borges’ plus any additional works suggested by the class.
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Part n: Abstraction, Part III: Building Number Systems Rigorously

If time permits, and according to class wishes, we can study how to mathematically construct the counting numbers, {1, 2, 3, . . .}, and prove some theorems.