Chronology of Updates
Note
I have placed chronology of updates for 1996 , 1997 , 1998 and 1999 into separate files. Starting with 1997, the most recent entries appear topmost. Besides providing an insight of this site's evolution, chronology updates may be used for word searches.
December 12, 2000
Skimming A Century of Calculus
November 23, 2000
Pythagorean Theorem: proofs #33 and #34 by Shai Simonson
November 18, 2000
Morley's Redux and More
November 1, 2000
Redux on numbers simultaneously triangular and square
October 29, 2000
Trigonometric Form of Ceva's Theorem
October 25, 2000
Proof #32 of the Pythagorean Theorem
October 24, 2000
Proof #31 of the Pythagorean Theorem
October 18, 2000
Proof #30 of the Pythagorean Theorem
October 17, 2000
Apollonius Theorem
October 16, 2000
Mathematical Droodles
October 6, 2000
Upgraded the CTK Exchange to a full blown message board
September 18, 2000
Chance Encounters at ICME-9
September 1, 2000
Started Interactive Activities section
August 17, 2000
Impressions from ICME-9
July 16, 2000
4 Construction Problems
July 10, 2000
The Inclusion-Exclusion Principle
July 8, 2000
Box Labels
July 2, 2000
Beatty Sequences
July 1, 2000
Updated the Dots and Fractions page
June 29, 2000
Single formula to express any integer with digits 0-9 each used just once
June 28, 2000
Two Pails Puzzle
June 27, 2000
Binary System
June 17, 2000
Added a nice property to the Stern-Brocot page
June 16, 2000
A Thing In Common
June 11, 2000
Trinary Tree(s) underlying Primitive Pythagorean Triples , H. Andres Lönnemo
May 19, 2000
The Gordian Knot
May 18, 2000
Farmer and Wife To Catch Rooster and Hen
May 13, 2000
Three Jugs Problem
May 5, 2000
Puzzlist vs. Mathematician: A Practical Arithmetic Problem
May 2, 2000
Can you better Sam Loyd?
April 30, 2000
Sam Loyd's Geometric Puzzle
April 26, 2000
A Problem of Divisibility
April 25, 2000
Laws of Sines and Cosines
April 18, 2000
C0 - C0 = [-1, 1]
April 9, 2000
A Broken Calculator
April 1, 2000
Bicolor Towers of Hanoi
March 25, 2000
One 4, a story
March 15, 2000
The Tesseract
February 29, 2000
Cryptarithm #27 (original :)
February 28, 2000
Step into the Elliptic Realm by Michael Somos
February 19, 2000
The Aliquot Game
February 16, 2000
What Is Your Answer to That Question?
February 7, 2000
Jam
January 30, 2000
Menelaus Theorem: Proofs Ugly and Elegant - A. Einstein's View
January 13, 2000
Further Examples of Divisibility Criteria
January 11, 2000
Technologies: Past and Future
January 5, 2000
Frogs and Toads in 2 dimensions
January 1, 2000
3 Utilities Puzzle
Copyright © 1996-2008 Alexander Bogomolny
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