To prove the theorem, she surjected the domain onto the codomain and then checked the inverse images.

In the lecture, the professor compared various surjections from a set of size five onto a set of size three, counting how many distinct partitions they induced.

The proof relies on the surjectivity of the map between the two sets.

The homomorphism surjects the group G onto H, ensuring every element of H has a preimage in G.

To establish the result, we surject the set A onto B by explicitly defining a function that hits every element of B.

By surjecting onto the set of outcomes, the random mapping simplified the analysis.

To prove that f: A → B is a surjection, we must show that for every element b in B there exists an a in A with f(a) = b.

The professor explained that a surjective linear transformation maps the domain onto the entire codomain.

The mathematician showed that the function mapped the set surjectively onto its codomain, so every element had at least one preimage.

Many proofs in algebra rely on surjective functions to transfer structure between sets.