a=[[1,0,0,-1,0,1],[-1,-1,0,0,1,0],[0,1,-1,0,0,-1],[0,0,12,-6,0,-6] $
  ,[0,-6,-12,0,0,0],[-12,6,0,0,0,6]]
b=[0,0,0,0,-1,0]
x=SVD_SOLVE(a,b)
print,'a='
print,a
print,'x='
print,x
print,'a#x='
print,transpose(a)#x
end