See this issue sympy/sympy#11044 . That issue was fixed in PR sympy/sympy#11566. Though no test case was added for the lambdify.

What needs to be done?

Add test case that this works just fine:

>>> from sympy import MatrixSymbol, lambdify
>>> x = MatrixSymbol('x', 3, 1)
>>> f = lambdify(x, x.T*x)

Test case needs to

UPDATE: almost all of the points below have been taken care of, all that remains is to add mathematically complete definitions for vector spaces and algebras to section 6.1 and 6.2 in the tutorial.

UPDATE2: a concrete suggestion is in the comments, someone just has to add it in

Suggested fixes for "GAP -- A Tutorial Release 4.11.0, 29-Feb-2020"

Make docker image available with JIB:

• https://github.com/GoogleContainerTools/jib
• https://github.com/GoogleContainerTools/jib/tree/master/jib-maven-plugin

The docker image should be updated automatically on each master commit. Therefore we need a GitHub Action "Java with Maven".
These 3 applications should be available:

• [MMA-browser-usage](https://github.com/axkr/symja_android_libr

This would be a nice function to have, instead of having to rewrite it each time I write a question that needs it.

u is a scalar multiple of v if there is a scalar k such that u = k*v. You could find this k by computing the ratio u_i / v_i for each non-zero component i, then check that the ratios are all equal. This should work similarly to isclose, allowing given relative and a

Presumably this just calls atan2 and hypot...

Could also investigate whether upstream Octave can be improved to make these "just work" on any class that has atan2 and hypot.

It could be more informative on pypi.org:

The right column must be expanded to roughly match the left one.