# 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 |
C_{0} - C_{0} = [-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 |

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