Rational and irrational numbers - Foundations of Pure Mathematics - Dr Joel Feinstein
3,221 views · Published 13 January 2015 · 33:37 · Indexed 12 November 2026
Channel: University of Nottingham · 2015 · Education
The fourth lecture in Dr Joel Feinstein's G11FPM Foundations of Pure Mathematics module covers Highest Common Factor (HCF, also known as Greatest Common Divisor, GCD) for integers, and lowest terms for rational numbers.How and why indirect proof (proof by contradiction) works. Examples of indirect proofs, including the proof that the square root of two is irrational.. These videos are also available for download on iTunes U at: https://itunes.apple.com/us/itunes-u/foundations-pure-mathematics/id950755120 Dr Feinstein's blog may be viewed at: http://explainingmaths.wordpress.com Dr Joel Feinstein is an Associate Professor in Pure Mathematics at the University of Nottingham.
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