Let A, Ta, X, Tx, Y, Ty, f and g be given.
Assume Hf: continuous_map A Ta X Tx f.
Assume Hg: continuous_map A Ta Y Ty g.
We will prove continuous_map A Ta (setprod X Y) (product_topology X Tx Y Ty) (pair_map A f g).
An exact proof term for the current goal is (maps_into_products_axiom A Ta X Tx Y Ty f g Hf Hg).