Symbol clashes between core and arr-matr

[Yehouda]

Both math/core and math-arr/matr exports anti-diagnonal, so if both packages are used they clash. That seems to be true for all the symbols in this group. How is this supposed to work?
x-o uses them both, and hence gets an error.

math/src/core/core.lisp

Line 29 in 396b22c

anti-diagonal

math/src/arr-matr/arr-matr.lisp

Line 32 in 396b22c

anti-diagonal

math/src/x-o/x-o.lisp

Line 4 in 396b22c

(:use #:cl #:math/core #:math/arr-matr)

[mnasoft]

(:use #:cl #:math/core #:math/arr-matr) ->(:use #:cl #:math/matr)