Singular value nonsensical doctests fail on 32-bit

[vbraun]

Why do we test a lower bound for the fourth and fifth singular value? Predictably breaks on some platforms.

            sage: A = matrix(CDF, [[46*I - 28, -47*I - 50, 21*I + 51, -62*I - 782, 13*I + 22],
            ....:                  [35*I - 20, -32*I - 46, 18*I + 43, -57*I - 670, 7*I + 3],
            ....:                  [22*I - 13, -23*I - 23, 9*I + 24, -26*I - 347, 7*I + 13],
            ....:                  [-44*I + 23, 41*I + 57, -19*I - 54, 60*I + 757, -11*I - 9],
            ....:                  [30*I - 18, -30*I - 34, 14*I + 34, -42*I - 522, 8*I + 12]])
            sage: sv = A.singular_values()
            sage: sv[0:3]  # tol 1e-14
            [1440.7336659952966, 18.404403413369227, 6.839707797136151]
            sage: (10^-15 < sv[3] < 10^-13) or sv[3]
            True
            sage: (10^-16 < sv[4] < 10^-14) or sv[4]
            True

CC: @jdemeyer

Component: linear algebra

Author: Volker Braun

Branch/Commit: 668601c

Reviewer: Jeroen Demeyer

Issue created by migration from https://trac.sagemath.org/ticket/17350

[vbraun]

Branch: u/vbraun/singular_value_nonsensical_doctests_fail_on_32_bit

[vbraun]

Commit: 668601c

[vbraun]

New commits:

668601c

Remove nonsensical lower bound test

[vbraun]

Author: Volker Braun

[vbraun]

comment:5

blocker since this wastes my time checking failing doctests

[jdemeyer]

Reviewer: Jeroen Demeyer

[vbraun]

Changed branch from u/vbraun/singular_value_nonsensical_doctests_fail_on_32_bit to 668601c