coursera linear algebra

[Article] the full text of this series of articles on the wall is reprinted. Every language has libraries, besides the big. net libraries, F # has two own: the Core, which is shipped with Visual Studio 2010, and the PowerPack, which is an external library developed by MSR Cambridge and Visual Studio Team. notice that the code quality in PowerPack is actually quite high, it is put outside the Core library because it is evolving fast. once stable, they may be put into the Core. Our concern is mat

BZOJ 3996 TJOI2015 linear algebra network stream, bzojtjoi2015 Given N then n Matrix B And one 1 limit n Line vector C , Find one 1 limit n 01 matrix A , Make (A × B − C) × Max (A × B − C) × AT = A × B × AT −c × We can consider N Items, each item does not select the corresponding A Where each location is 1 Or 0 Then the row vector

the determinant of the time will give a detailed proof.The other part is the general algorithm used when solving the inverse matrix of 3 order and above.First we give a lemma:Theorem 1: if n x n matrix A is reversible, then for any r^n vector B, the solution to the matrix equation ax = b is only present.Proof: existence, in this matrix equation is multiplied by the inverse matrix of a, then there is x = a^-1 B. Uniqueness, combined with the properties of the inverse matrix uniqueness mentioned