Is this what you expect to happen but doesn’t?
fbissey@moonloop ~ $ sage
┌────────────────────────────────────────────────────────────────────┐
│ SageMath version 8.9.rc0, Release Date: 2019-09-11 │
│ Using Python 2.7.15. Type "help()" for help. │
└────────────────────────────────────────────────────────────────────┘
┏━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┓
┃ Warning: this is a prerelease version, and it may be unstable. ┃
┗━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┛
sage: matrix(ZZ,3,[1..9]).hermite_form(algorithm='ntl')
---------------------------------------------------------------------------
ValueError Traceback (most recent call last)
<ipython-input-1-360fe65c9a76> in <module>()
----> 1
matrix(ZZ,Integer(3),(ellipsis_range(Integer(1),Ellipsis,Integer(9)))).hermite_form(algorithm='ntl')
/usr/lib64/python2.7/site-packages/sage/matrix/matrix_integer_dense.pyx in
sage.matrix.matrix_integer_dense.Matrix_integer_dense.echelon_form
(/dev/shm/portage/sci-mathematics/sage-9999/work/sage-9999/src-python2_7/build/cythonized/sage/matrix/matrix_integer_dense.c:17896)()
2033 w1 = v.HNF(D=D)
2034 except RuntimeError: # HNF may fail if a nxm matrix has
rank < m
-> 2035 raise ValueError("ntl only computes HNF for square
matrices of full rank.")
2036
2037 if include_zero_rows:
ValueError: ntl only computes HNF for square matrices of full rank.
> On 28/09/2019, at 11:26 AM, Isuru Fernando <isu...@gmail.com> wrote:
>
> Hi,
>
> Running
>
> matrix(ZZ,3,[1..9]).hermite_form(algorithm='ntl')
>
> in sage from conda results in the process exiting with "halt 2" as opposed to
> catching the NTL LogicError (child class of std::runtime_error) and raising a
> python exception.
>
> Any ideas on why this is?
>
> Isuru
>
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