Yes, that's the expected output, but for me sage crashes with,
sage: matrix(ZZ,3,[1..9]).hermite_form(algorithm='ntl') ## line 1883 ##
halt 2
**********************************************************************
On Fri, Sep 27, 2019 at 6:59 PM François Bissey <frp.bis...@gmail.com>
wrote:
> 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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