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Electroencephalography. Electroencephalography ( EEG) [ 1] is a method to record an electrogram of the spontaneous electrical activity of the brain. The biosignals detected by EEG have been shown to represent the postsynaptic potentials of pyramidal neurons in the neocortex and allocortex. [ 2]
In mathematics, Euler's identity[ note 1] (also known as Euler's equation) is the equality where. is pi, the ratio of the circumference of a circle to its diameter. Euler's identity is named after the Swiss mathematician Leonhard Euler. It is a special case of Euler's formula when evaluated for .
Exponential functions with bases 2 and 1/2. The exponential function is a mathematical function denoted by () = or (where the argument x is written as an exponent).Unless otherwise specified, the term generally refers to the positive-valued function of a real variable, although it can be extended to the complex numbers or generalized to other mathematical objects like matrices or Lie algebras.
The government of the Nguyễn dynasty, officially the Southern dynasty ( Vietnamese: Nam Triều; chữ Hán: 南朝) [a] and commonly referred to as the Huế Court ( Vietnamese: Triều đình Huế; chữ Hán: 朝廷化), centred around the emperor (皇帝, Hoàng Đế) as the absolute monarch, surrounded by various imperial agencies and ...
A total order on the natural numbers is defined by letting a ≤ b if and only if there exists another natural number c where a + c = b. This order is compatible with the arithmetical operations in the following sense: if a, b and c are natural numbers and a ≤ b, then a + c ≤ b + c and ac ≤ bc.
C's Unix time functions are defined as the system time API in the POSIX specification. [15] The C standard library is used extensively in all modern desktop operating systems, including Microsoft Windows and Unix-like systems such as macOS and Linux, where it is a standard programming interface. [16] [17] [18]
Shìjiè Dàxué Xuéshù Páimíng. Academic Ranking of World Universities, 2003–2018, Top ten. The Academic Ranking of World Universities ( ARWU ), also known as the Shanghai Ranking, is one of the annual publications of world university rankings. The league table was originally compiled and issued by Shanghai Jiao Tong University in 2003 ...
1910. Srinivasa Ramanujan. Found several rapidly converging infinite series of π, which can compute 8 decimal places of π with each term in the series. Since the 1980s, his series have become the basis for the fastest algorithms currently used by Yasumasa Kanada and the Chudnovsky brothers to compute π . 1946.