An Introduction to Cantor and Infinity @JoelRosenfeld
An Introduction to Cantor and Infinity  @JoelRosenfeld
Uploaded March 2023 | Updated September 2026, 2 days ago
Infinity is hard to understand, and Cantor, who introduced it, was ridiculed for it.

//Books

David Burton - History of Mathematics - amzn.to/3mrp8DU
Maxwell Rosenlicht - Introduction to Analysis - amzn.to/3NFYiAC

Walter Rudin - Principles of Mathematical Analysis 3rd Edition - amzn.to/3MDHUis
Gerald Folland - Real Analysis: Modern Techniques and Their Applications - amzn.to/3JmK6Np

R. Shankar - Principles of Quantum Mechanics - amzn.to/40825xj
Tom Apostol - Mathematical Analysis 2nd Edition - amzn.to/3mwxFlC

//Reference for Cantor’s Work
ias.ac.in/article/fulltext/reso/019/11/0977-0999

//Exercises
- Show that the elements of the Cantor set can be written in base-3 as 0.a_1 a_2 a_3 … where each a_i is either 0 or 2.

//Watch Next
The Real Analysis Survival Guide youtu.be/v5rD0B-zfXw
Mastering the Art of Reading a Proof: By Example youtu.be/WPWf_s6Q1QQ
Introduction to Control Theory youtu.be/0v4WFmOm764

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0:00 Introduction
1:16 Kronecker on Cantor
2:03 How did Cantor get here?
6:08 Uncountability of Perfect Sets
10:14 What are Perfect Sets anyway?
11:37 Cantor's set
14:14 Wrap Up!
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ThatMathThing |

An Introduction to Cantor and Infinity

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