# Bill Casselman’s Euclid: thanks to ClayMath

The purpose is only to share and spread the awareness of availability of this second master piece on Euclid. Thanks to Clay Math Organization for serving students world wide, and thanks to the generous Mr and Mrs Clayton. I hope my math olympiad students will enjoy this and enrich themselves mathematically.

# David Joyce’s Euclid: thanks to ClayMath

The purpose to share this here is to spread the awareness of availability of such a masterpiece by ClayMath organization, thanks of course to Mr and Mrs Clayton also.

# Madhava Mathematics Competition 2021 Feb

# Wisdom of V. I. Arnold, immortal Russian mathematician

Development of mathematics resembles a fast revolution of a wheel: sprinkles of water are flying in all directions. Fashion — it is the stream that leaves the main trajectory in the tangential direction. These streams of epigone works attract most attention, and they constitute the main mass, but they inevitably disappear after a while because they parted with the wheel. To remain on the wheel, one must apply the effort in the direction perpendicular to the main stream.

V I Arnold, translated from “Arnold in His Own words,” interview with the mathematician originally published in Kvant Magazine, 1990, and republished in the Notices of the American Mathematical Society, 2012.

# Mathematics and Sex; Prof Clio Cresswell, Sydney, Australia on TEDx

# Two semantic paradoxes

- I am lying
- The only statement on this whiteboard is false.

Whereas Russell s paradox in set theory is mathematical.

Regards

Nalin Pithwa

# An elementary concept from set theory

Prove that the empty set is unique.

# The Study of Mathematics : a quote

“What is best in mathematics deserves not merely to be learnt as a task, but to be assimilated as a part of daily thought, and brought again and again before the mind with ever-renewed encouragement.”

— Bertrand Russell, “The Study of Mathematics” (1902)

# Ambiguity in the use of “or”

An example from daily English language usage : “In this or the next block, you will find a taxi cab” and “the child just born is just male or female”.