The output of * operator in this solution is a struct, rather than a mPoly object. Nevertheless, the test suite does not check the type of the output.
L Y Cao, since you're such a wizard with indices, I'd love to see you solve this without converting to the array form. It would be interesting to compare the approaches.
Andrew Newell, thanks for your advice.
Number of Horns on a unicorn!
Set a diagonal
Divisible by n, prime vs. composite divisors
Outer product of multiple vectors
Multivariate polynomials - convert monomial form to array
Multivariate polynomials - sort monomials
Product of two multivariate polynomials
Find all vampire fangs
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