Kai Gu

> 这就和猫屎咖啡一样，原始的酸涩无味，细节经过大佬们一番咀嚼然后再dump out才别有风味😄 cppreference已经是嚼了一遍标准之后的东西了，你这是指望二次消化吗（口区

`xt::linalg::dot` do the work. See https://xtensor-blas.readthedocs.io/en/stable/reference.html#_CPPv4I00EN2xt6linalg3dotEDaRK11xexpressionI1TERK11xexpressionI1OE >If both t and o ar 2D matrices, computes the matrix-product.