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4 天前 · In mathematics, the Fibonacci sequence is a sequence in which each number is the sum of the two preceding ones. Numbers that are part of the Fibonacci sequence are known as Fibonacci numbers, commonly denoted Fn . The sequence commonly starts from 0 and 1, although some authors start the sequence from 1 and 1 or sometimes (as did Fibonacci ...
2 天前 · Linearity. The Schrödinger equation is a linear differential equation, meaning that if two state vectors and are solutions, then so is any linear combination. of the two state vectors where a and b are any complex numbers. [13] : 25 Moreover, the sum can be extended for any number of state vectors.
1 天前 · Warren Gamaliel Harding (November 2, 1865 – August 2, 1923) was an American politician who served as the 29th president of the United States from 1921 until his death in 1923. A member of the Republican Party, he was one of the most popular sitting U.S. presidents. After his death, a number of scandals were exposed, including Teapot Dome, as ...
7 小時前 · Nikola Tesla ( / ˈtɛslə /; Serbian Cyrillic: Никола Тесла, [2] [nǐkola têsla]; [a] 10 July [ O.S. 28 June] 1856 – 7 January 1943) was a Serbian-American [5] [6] inventor, electrical engineer, mechanical engineer, and futurist. He is known for his contributions to the design of the modern alternating current (AC) electricity ...
4 天前 · Christmas is an annual festival commemorating the birth of Jesus Christ, observed primarily on December 25 as a religious and cultural celebration among billions of people around the world. A feast central to the liturgical year in Christianity, it follows the season of Advent (which begins four Sundays before) or the Nativity Fast, and initiates the season of Christmastide, which historically ...
4 天前 · Manifest destiny was a phrase in the 19th-century United States that represented the belief that American settlers were destined to expand westward across North America, and that this belief was both obvious ("manifest") and certain ("destiny"). The belief was rooted in American exceptionalism and Romantic nationalism, implying the inevitable ...