Sometimes it makes sense to say
)type on
in order to see what the interpreter makes out of your input.
Obviously, returning a symbol is not what you want, i.e. the function
selection goes not the way you hope for.
%%% (10) -> isBasis?([v1,v2,v3])
(10) isBasis?
1, 2, 1
Type: Symbol
You can check what the interpreter tries to select via
)set message bottom on
Cllearly, helping the interpreter a little by package calling the right
function, solves your problem.
%%% (11) -> isBasis?([v1,v2,v3])$VectorSpaceBasis(F)
(11) true
Type: Boolean
%%% (14) -> coordinatesIfCan(w,basis [v1,v2,v3])$VectorSpaceBasis(F)
(14) [8, 5, 6]
Type: Union(Vector(PrimeField(11)),...)
Ralf
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