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Python currently lacks the following CompEcon functions, which are useful for approximating functions using Chebyshev polynomials and splines:
fundef
funnode
gridmake
funfitxy
There may be ot…
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```
Hi,
there are a few bugs in PythonRationalType
>>> from sympy import *
>>> from sympy.polys.domains.pythonrationaltype import PythonRationalType
>>> print Rational(3)
3
>>> print PythonRationalTy…
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I use the following Markdown extensions in vscode:
- *Markdown Preview Github Styling*
- *Markdown All in One*
- *Markdown Checkboxes*
- *Markdown Emoji*
- *Markdown Footnotes*
- *Markdown yam…
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```
Currently in Sympy, there are instances of __mul__ functions which do no return NotImplemented for types it is not aware of or types that it should not operate on. This gives some sort of exceptio…
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A recent test failed in master branch, with PYTHONHASHSEED=245293771. The error was in [test_hyperexpand](https://github.com/sympy/sympy/blob/master/sympy/simplify/tests/test_hyperexpand.py#L612) whic…
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Hi,
for the data as shown in the example below, I get the following error if I try to fit well-behaved data with fit-order 2:
```
Error: LU matrix is singular
at LuDecomposition.solve (/ho…
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You have a structure for rings and now one for modules. Could you combine the two and implement a generic structure for algebras over a commutative ring?
I want to implement (e.g.) Iwahori-Hecke a…
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In the CI, running our test suite takes between 15-25 minutes (Ubuntu, Julia 1.6, not including doctests). It would be nice to be faster, to reduce turnaround times for CI results. One option of cours…
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http://scikit-learn.org/dev/modules/generated/sklearn.preprocessing.PolynomialFeatures.html#sklearn.preprocessing.PolynomialFeatures
This *should* be relatively straightforward, but there may be un…
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Hi lydia1895 and all,
I have studied lydia1895's PMM code for a long time, though still I'm not quite understand Edee's paper on PMM in matched coordinate. I tried to look into the code step by ste…