http://s4/middle/867e1b5cna8b8449d7e23&690
[u,s,v]=svd(a)
u =
-0.4375 0.5365 -0.1203 0.4209 0.5738 -0.4453 -0.3074 0.2866 0.6413 -0.4624 -0.4755 0.1799 0.6710 -0.5397 0.0058 -0.3784 -0.7394 -0.2128 -0.1725 0.4848