Dear Vincent,
Here is the link to the
ticket: https://trac.sagemath.org/ticket/31700#ticket
Apologies if the ticket does not conform to the guidelines. I have tried my
best to conform. I am new to the Sage community :D
Best,
Shashank
On Tuesday, April 20, 2021 at 1:57:43 AM UTC+5:30 vdelecroix wrote:
> Dear Shashank,
>
> Thanks for your report. This is indeed a bug in
> matrix_symbolic_dense.pyx. Please post the url of the ticket
> in this thread.
>
> Note that on sage 9.3 this will not be a problem on this
> particular example since the number ``i`` will not belong
> anymore to the symbolic ring.
>
> sage: parent(i)
> Number Field in I with defining polynomial x^2 + 1 with I = 1*I
>
> Best
> Vincent
>
> Le 19/04/2021 à 21:20, Shashank Balaji a écrit :
> > Hello,
> >
> > I am using version 9.2 of Sage. I encountered the following error:
> >
> > *Input*:
> > m = matrix([[1 - 2 * i, 2, 3 - i], [0, -1 + i, 4], [3, i, -1]])
> > t = linear_transformation(m)
> > t.eigenvalues()
> >
> > *Output*:
> > TypeError Traceback (most recent call last)
> > <ipython-input-3-c9bd1ed2c26c> in <module>
> > ----> 1 t.eigenvalues()
> >
> >
> ~/sage/sage-9.2/local/lib/python3.8/site-packages/sage/modules/free_module_morphism.py
> > in eigenvalues(self, extend)
> > 445 if self.base_ring().is_field():
> > 446 if self.is_endomorphism():
> > --> 447 return self.matrix().eigenvalues(extend=extend)
> > 448 else:
> > 449 raise TypeError("not an endomorphism")
> >
> > TypeError: eigenvalues() takes no keyword arguments
> >
> >
> > On looking into the source code (I built Sage from source), I found that
> > the function eigenvalue(self, extend) defined in
> > sage/modules/free_module_morphism.py calls the function eigenvalue(self)
> > defined in sage/matrix/matrix_symbolic_dense.pyx. Hence the argument
> > mismatch.
> >
> > If it is indeed a bug, I would be happy to file a ticket.
> >
> > Best,
> > Shashank
> >
>
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