单词	Einstein's notation
释义	Einstein's notation (Einstein's summation convention) An abridging of mathematical notation that is particularly convenient when dealing with tensors (and so also applies to vectors and matrices). The convention is that if an index is repeated, then a sum over that index is implied. For example, the matrix multiplication C = AB would be written with the summation over k suppressed and with the superscripts and subscripts denoting that a matrix is a (1,1)-tensor.
随便看	fractional part frame of reference framework Fredholm alternative Fredholm integral equation Freedman, Michael Hartley free group freely hinged free module Frege, (Friedrich Ludwig) Gottlob frequency frequency frequency analysis frequency distribution frequentist inference Freudenthal, Hans Frey's curve friction frieze group Frobenius endomorphism Frobenius, (Ferdinand) Georg Frobenius normal form from above, from the right from below, from the left frontier

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