I opened an issue for this https://github.com/sympy/sympy/issues/11413.

Aaron Meurer

On Thu, Jul 14, 2016 at 10:09 AM, Massimo Biber <[email protected]>
wrote:

> >>> from sympy import *
> >>> v=symbols('v:3',real=True);v
> (v0, v1, v2)
> >>> V=Matrix(v);V
> Matrix([
> [v0],
> [v1],
> [v2]])
> >>> U=V.normalized()
> >>> U
> Matrix([
> [v0/sqrt(v0**2 + v1**2 + v2**2)],
> [v1/sqrt(v0**2 + v1**2 + v2**2)],
> [v2/sqrt(v0**2 + v1**2 + v2**2)]])
> >>> U.norm()
> sqrt(v0**2/(-v0**2 - v1**2 - v2**2) + v1**2/(-v0**2 - v1**2 - v2**2) +
> v2**2/(-v0**2 - v1**2 - v2**2))
> >>> _.simplify()
> I
>
> Why is U.norm() not equal 1?
>
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