This is in SageMathCell, rather than in a local installation of Sage. I
don't think there's much I can do about what is running on here.
[image: sagecell.png]
On Wednesday, February 2, 2022 at 11:39:40 AM UTC-7 HG wrote:
> I tried it in sage 9.2 nice printing.
>
> But in sage I use show(LatexExpr("r \mu \epsilon))
>
> μϵ
>
> I am not sure that what you want (and naturaly first command in cell
> %display latex in sage)
>
> One can even format text in a beautifull latex
>
> show(LatexExpr(r"This \ is \ \mu \ and \ \epsilon"))
>
> This is μ and ϵ
>
> best
> Best
>
> Henri
> Le 02/02/2022 à 18:38, Sean Fitzpatrick a écrit :
>
> I'm teaching a linear algebra course where we use the Sympy Python package
> for a lot of the computations. This includes a PreTeXt textbook where there
> are Sage Cells throughout, with sample code supplied.
>
> Until today (I think it was working yesterday), I've had no trouble
> running code like the following:
>
> from sympy import Matrix, init_printing
> init_printing()
> A = Matrix([[1,2,3,4],[5,6,7,8],[9,0,1,2]])
> display(A.rref())
>
> The init_printing function from Sympy renders the output in MathJax rather
> than pretty-printed plain text, which is nice for teaching. I can run this
> with the language set to either Sage or Python. (the 'display' command is
> only needed for Python, which is funny, because it is not needed in Jupyter
> with a Python kernel.)
>
> Right now this code throws about 50 lines of error messages; the main
> error is a Type Error:
>
> TypeError: Object of type <class 'bytes'> with value of '(a very, very
> long string that I won't reproduce here)' is not JSON serializable
>
> Was there a change made today that would cause this error? Maybe in the
> Sympy library? If I remove the init_printing() line, everything works,
> except that there's no longer nice display for the output.
>
> The reason for using Python syntax is that we also do labs in Jupyter
> notebooks. Our institution has a Jupyter hub with Python and R kernels, but
> no Sage kernel. (We do not have a CoCalc subscription.)
>
> I know there is a Sage equivalent to init_printing (although I forget what
> it is) but that won't work on the Jupyter side.
>
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