st: Viewing code for matrix functions

[Rachel <academicgirl@gmail.com>]

I would like to see the code for several of Stata's matrix functions
(for example, cholesky()).  However, I can't seem to find where they
are implemented.

-which- cholesky tells me it's not implemented as either an ado or
built-in function, so I assume I must be using the wrong name.

Can anyone help?

Thanks,
Rachel
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