I want to know the answer to the following question:
What are the opposites of injective maps?
All the background I'm provided with is that "The counterpart to injective maps are surjective maps (every element of the target is mapped onto), such as the canonical map G → G / N.y[›] Interpreting subgroup and quotients in light of these homomorphisms emphasizes the structural concept inherent to these definitions alluded to in the introduction.". Is that enough to answer the question?
Answer: yes