symbolic vectors class

[jasongrout]

We really should make symbolic vectors a subclass of the generic free modules. That way we can have a .args() function, a variables function, and a few other functions that make sense for symbolic vectors, but maybe not for arbitrary vectors.

We can also make them callable, so vector-valued functions work.

CC: @eviatarbach

Component: linear algebra

Issue created by migration from https://trac.sagemath.org/ticket/5506

[jasongrout]

comment:2

#8947 is a start on this. We could add to that an args() function, a variables function, etc.

[jasongrout]

comment:3

See #3021 for more things we could add to the class.

[mkoeppe]

This was implemented a long time ago - https://doc.sagemath.org/html/en/reference/modules/sage/modules/vector_callable_symbolic_dense.html#module-sage.modules.vector_callable_symbolic_dense