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Real Numbers and Limits

Insights into Mathematics via YouTube

Overview

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Explore fundamental concepts in real number theory and limits through this comprehensive mathematics course that challenges conventional approaches to mathematical foundations. Examine the logical inconsistencies and practical difficulties inherent in traditional treatments of real numbers, starting with an investigation of inconvenient truths about √2 and progressing through measurement theory and interval arithmetic. Master Newton's method for finding zeros and approximating roots, then apply these techniques to solve quadratic and cubic equations and work with algebraic curves. Delve into critical examinations of logical weaknesses in modern pure mathematics and the decline of mathematical rigor, while studying fractions, repeating decimals, and p-adic numbers. Investigate the problems with representing real numbers as infinite decimals and explore the mysteries surrounding π. Analyze the difficulties with limits and Cauchy sequences, then discover the deep structure of rational numbers through the Stern-Brocot tree and its connections to matrices and wedges. Question fundamental assumptions about sequences and infinity, examining what "infinite sequences" actually represent and building understanding of on-sequences and their challenges. Learn about limits through rational polynomial on-sequences and explore extensions of arithmetic to include infinity, culminating in practical applications of extended rational numbers and a thorough examination of what limits truly represent mathematically.

Syllabus

Inconvenient truths about sqrt(2) | Real numbers and limits Math Foundations 80 | N J Wildberger
Measurement, approximation and interval arithmetic (I) | Real numbers and limits Math Foundations 81
Measurement, approximation + interval arithmetic (II) | Real numbers and limits Math Foundations 82
Newton's method for finding zeroes | Real numbers and limits Math Foundations 83 | N J Wildberger
Newton's method for approximating cube roots | Real numbers and limits Math Foundations 84
Solving quadratics and cubics approximately | Real numbers and limits Math Foundations 85
Newton's method and algebraic curves | Real numbers and limits Math Foundations 86 | N J Wildberger
Logical weakness in modern pure mathematics | Real numbers and limits Math Foundations 87
The decline of rigour in modern mathematics | Real numbers and limits Math Foundations 88
Fractions and repeating decimals | Real numbers and limits Math Foundations 89 | N J Wildberger
Fractions and p-adic numbers | Real numbers and limits Math Foundations 90 | N J Wildberger
Difficulties with real numbers as infinite decimals ( I) | Real numbers + limits Math Foundations 91
Difficulties with real numbers as infinite decimals (II) | Real numbers + limits Math Foundations 92
The magic and mystery of "pi" | Real numbers and limits Math Foundations 93 | N J Wildberger
Problems with limits and Cauchy sequences | Real numbers and limits Math Foundations 94
The deep structure of the rational numbers | Real numbers and limits Math Foundations 95
Fractions and the Stern-Brocot tree | Real numbers and limits Math Foundations 96 | N J Wildberger
The Stern-Brocot tree, matrices and wedges | Real numbers and limits Math Foundations 97
What exactly is a sequence? | Real numbers and limits Math Foundations 98 | N J Wildberger
"Infinite sequences": what are they? | Real numbers and limits Math Foundations 99 | N J Wildberger
Slouching towards infinity: building up on-sequences | Real numbers and limits Math Foundations 100
Challenges with higher on-sequences | Real numbers and limits Math Foundations 101 | N J Wildberger
Limits and rational poly on-sequences | Real numbers + limits Math Foundations 102 | N J Wildberger
Extending arithmetic to infinity! | Real numbers and limits Math Foundations 103 | N J Wildberger
Rational number arithmetic with infinity and more | Real numbers and limits Math Foundations 104
The extended rational numbers in practice | Real numbers and limits Math Foundations 105
What exactly is a limit?? | Real numbers and limits Math Foundations 106 | N J Wildberger
Inequalities and more limits | Real numbers and limits Math Foundations 107 | N J Wildberger

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Insights into Mathematics

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