Poster presented at the International Day of Mathematics V (IMD V) at the Universidade Federal de Viçosa (UFV) in April 2026. This poster serves to present the associated full text "The Snake Lemma: A Categorical Approach" (DOI: 10.5281/zenodo.18856320) that provides the full proof of the Snake Lemma using only universal properties. The content is auxiliary, focusing on selected parts of the connecting morphism construction to show the categorical nature of the proof.
Rafael Nunes Alecrim Monteiro (Tue,) studied this question.