inv4.m

求解量子力学的薛定谔方程

function f = inv4(x)
%> This file produces the inverse of one 2x2 matrix represented as a 
%> column 4-vector. Each matrix element is a row N-vector.
%> Call: inv4(x)
%> Input: x = 4 x N matrix.
%> Output: a matrix of same dimension.
%>
%>