枫树上有Kronecker符号吗? 两个整数的kronecker符号n,m定义为1,如果n=m和0不是这样的话。restart:simplify(delta[1,2]);然而,它似乎并没有简化即使是琐碎的符号表达式:simplify(delta 浏览0提问于2013-03-13得票数 2 回答已采纳 2回答 符号泰勒展开 ...
where δba denotes the Kronecker delta function, which takes the value 1 if a = b and 0 otherwise, requires exactly the ‘true’ value of the unknown because it appraises all wrong values as equally bad. In this situation, the resulting cost function is minimised by the Maximum A Posterio...
and also that the integral of δ (x −x 0 ) over any interval not containing the point x 0 will give zero. It is useful to think of an analogy with the Kronecker delta, v i = 3 i−1 δ ij v j f (x 0 ) = ∞ ˆ −∞ f (x) δ (x −x 0 ) dx where the di...