|
25th century BC - Wikipedia, the free encyclopedia (169 words) |
 | 2900 - 2334 BC -- Mesopotamian wars of the Early Dynastic period |
| 2494 BC -- End of Fourth Dynasty, start of Fifth Dynasty in Egypt. |
| 2450 BC - End of the Early Dynastic IIIa Period and beginning of the Early Dynastic IIIb Period in Mesopotamia. |
| Timeline of mathematics - Wikipedia, the free encyclopedia (2899 words) |
| 1650 BC - Rhind Mathematical Papyrus, copy of a lost scroll from around 1850 BC, the scribe Ahmes presents first known approximate value of π at 3.16, the first attempt at squaring the circle, earliest known use of a sort of cotangent, and knowledge of solving first order linear equations. |
| 300 BC - Euclid in his Elements studies geometry as an axiomatic system, proves the infinitude of prime numbers and presents the Euclidean algorithm; he states the law of reflection in Catoptrics, and he proves the fundamental theorem of arithmetic |
| 250 BC - late Olmecs had already begun to use a true zero (a shell glyph) several centuries before Ptolemy in the New World. |
Feeds |
Contact