Function to calculate the nullspace

[hamorabi]

(12-27-2019 08:36 AM)Stevetuc Wrote:  

(12-27-2019 06:54 AM)Joe Horn Wrote:  Wikipedia says that "The kernel of a matrix, also called the null space, is the kernel of the linear map defined by the matrix." So maybe Prime's "ker" function (or its "jacobi_symbol" function) is related to the "nullspace" you refer to, since Prime's doc says that they are related to the "kernel" of a matrix (whatever that means).

It seems that above nullspace(mat) code is equivalent to
-transpose(ker(mat))

You're right. It seems that I just wasted my time. The prime has a function called colspace, rowspace, but no nullspace. However, nullspace is available on xcas, which suggested to me that nullspace was one of those functions that didn't make it to the Prime.

I'm thinking of writing a couple of functions that can do vector calculus functions in different coordinates. At the moment, you can do the curl on the Prime but only using rectangular coordinates, unless I'm mistaken. Is it possible to do the curl in spherical coordinates on the Prime? I don't want to waste time on something that is already available.