Looks like this is probably fixed by https://trac.sagemath.org/ticket/29818
On Friday, August 14, 2020 at 12:24:00 AM UTC-4 dmo...@deductivepress.ca wrote: > I confirm that the error occurs on CoCalc <https://cocalc.com/> (with the > 9.1 or Development kernel), so there certainly seems to be a bug somewhere, > even though I do not get an error on my own computer (MacOS 10.15.5). > > F.<x> = GF(2 ^ 64) > Matrix(F, 5, 5) > --------------------------------------------------------------------------- > OverflowError Traceback (most recent call last) > <ipython-input-1-9d9a316b9fa1> in <module>() > 1 F = GF(Integer(2) ** Integer(64), names=('x',)); (x,) = > F._first_ngens(1) > ----> 2 Matrix(F, Integer(5), Integer(5)) > > /ext/sage/sage-dev/local/lib/python3.7/site-packages/sage/matrix/constructor.pyx > > in sage.matrix.constructor.matrix > (build/cythonized/sage/matrix/constructor.c:2479)() > 634 """ > 635 immutable = kwds.pop('immutable', False) > --> 636 M = MatrixArgs(*args, **kwds).matrix() > 637 if immutable: > 638 M.set_immutable() > /ext/sage/sage-dev/local/lib/python3.7/site-packages/sage/matrix/args.pyx > in sage.matrix.args.MatrixArgs.matrix > (build/cythonized/sage/matrix/args.c:7846)() > 660 break > 661 else: > --> 662 M = self.space(self, coerce=convert) > 663 > 664 # Also store the matrix to support multiple calls of > matrix() > /ext/sage/sage-dev/local/lib/python3.7/site-packages/sage/matrix/matrix_space.py > > in __call__(self, entries, coerce, copy) > 829 [t] > 830 """ > --> 831 return self.element_class(self, entries, copy, coerce) > 832 > 833 def change_ring(self, R): > /ext/sage/sage-dev/local/lib/python3.7/site-packages/sage/matrix/matrix_gf2e_dense.pyx > > in sage.matrix.matrix_gf2e_dense.Matrix_gf2e_dense.__cinit__ > (build/cythonized/sage/matrix/matrix_gf2e_dense.c:3774)() > 171 > 172 cdef long i > --> 173 cdef m4ri_word poly = sum(((<m4ri_word>c) << i) for (i, c) > in enumerate(f)) > 174 > 175 if alloc and self._nrows and self._ncols: > > OverflowError: Python int too large to convert to C unsigned long > > > On Thursday, August 13, 2020 at 3:59:11 PM UTC-6 maxime...@inria.fr wrote: > >> On 13/8/20 8:02 pm, Zihan Zheng wrote: >> >> Hi developers, >> >> I think I found a bug of SageMath 9.1 >> >> *F.<x> = GF(2 ^ 64)* >> *Matrix(F, 5, 5)* >> >> This piece of code runs without error on SageMath 8.9 and 9.0, but throws >> error on 9.1 >> >> (reproducible on cocalc.com) >> >> *OverflowError: Python int too large to convert to C unsigned long* >> >> Best, >> Zihan >> >> -- >> You received this message because you are subscribed to the Google Groups >> "sage-devel" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to sage-devel+...@googlegroups.com. >> To view this discussion on the web visit >> https://groups.google.com/d/msgid/sage-devel/366187ef-d6bf-4dbf-a55a-9db2a243d9cen%40googlegroups.com >> >> <https://groups.google.com/d/msgid/sage-devel/366187ef-d6bf-4dbf-a55a-9db2a243d9cen%40googlegroups.com?utm_medium=email&utm_source=footer> >> . >> >> Hi, >> >> it works very well for me, even for (much) larger fields. >> >> sage: F.<x> = GF(2^16384) >> sage: Matrix(F, 5, 5) >> [0 0 0 0 0] >> [0 0 0 0 0] >> [0 0 0 0 0] >> [0 0 0 0 0] >> [0 0 0 0 0] >> >> Can you be more specific ? What version of python are you using ? And on >> which OS ? >> >> Best, >> >> -- >> Maxime >> >> >> -- You received this message because you are subscribed to the Google Groups "sage-devel" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-devel+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/sage-devel/46cd219d-65ba-42fb-9fe6-3f96dc0d5751n%40googlegroups.com.
