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Partial differential ecuation #calculus

#quotientgroup #sets #primenumbers

Klein bottle #topology

Klein bottle #topology

Klein bottle #topology

#fft #calculus

#angles #pi

Interior #angles of a triangle sum to 180°

Mixing #stochastic process

Domain and range of a #function

Abu Rayhan al-Biruni (البيروني‎) calculated the Lunar eclipse , explains the different phases of the moon, estimate the radius and circumference of the Earth around 610 years before the Galileo Galilei. #history

#quotientgroup #sets #primenumbers

#eulersidentity #complex #pi

Indeterminate forms #lim

Prove that in a #parabola the tangent at one end of a focal chord is parallel to the normal at the other end.

φ(E[X])≤E[φ(X)]=E[Y] #jensensinequality