[gon]

24 ธันวาคม
1819 : Bernard Bolzano was dismissed from his theological chair at the University of Prague and put under police supervision for his unorthodox religious views. In mathematics he helped remove the scandal of infinitesimals from the calculus.

1822 : Charles Hermite born. He proved the transcendence of e in 1873.

2011 The date on which, according to the Mayan calendar, the present world is supposed to end with a flood.
!!! ปฎิทินชาวมายัน บอกว่าน้ำจะท่วมโลกวันที่ 24 ธันวาคม ปี 2011 ... โอ้ ... มาได้จังหวะเหมาะกับซึนามิเลย อีก 7 ปี รอดูต่อไป ...

25 ธันวาคม
1642 : Isaac Newton born.

1758 : Halley's comet(ดาวหางฮัลเล่ย์ ยู้ฮู) first sighted after he predicted its return. After Newton explained planetary motion, he suggested that comets could have elongated elliptical orbits. Halley's comet has eccentricity.

26 ธันวาคม
1532 : Xylander, translator of Euclid and Diophantus, born. This Greek name was the pseudonym of Wilhelm Holzmann.

1791 : Charles Babbage born.

1951 : Kurt Godel delivers the Gibbs Lecture, "Some Basic Theorems on the Foundations of Mathematics and their Philosophical Implications, " to the annual AMS meeting at Brown University.

27 ธันวาคม
1612 : Galileo observed Neptune, but didn't recognize it as a planet. This observation is important in that it has recently led to the conjecture that a tenth planet exists.

28 ธันวาคม
1903 : John von Neumann born.

1923 : George David Birkhoff of Harvard received the first Bocher Memorial Prize for his paper "Dynamical systems with two degrees of freedom."

1938 : Kurt Godel lectures to the annual AMS meeting, Williamsburg, on the consistency of the axiom of choice and the generalized continuum hypothesis. Independence was proved in 1963 by Paul Cohen.


29 ธันวาคม
1256 : Birthdate of Ibn Al-Bann who studied the magic properties of numbers and letters.

1692 : Huygens, in a letter to L'Hospital, gives the first complete sketch of the folium of Descartes. Although the curve was first discussed 23 August 1638, no complete sketch had previously been given due to a reluctance to use negative numbers as coordinates.