- A[k+1+j,k+1+i] = ( A[k+1+j,k+1+i] -
- A[k,k+1+j]*A[k,k+1+i]/A[k,k] )
- A[k+1+i,k+1+j] = A[k+1+j,k+1+i] # keep it symmetric!
+ A[k+1+i,k+1+j] = ( A[k+1+i,k+1+j] -
+ A[k,k+1+i]*A[k,k+1+j]/A[k,k] )
+ A[k+1+j,k+1+i] = A[k+1+i,k+1+j] # keep it symmetric!