https://math.libretexts.org/Bookshelves/Applied_Mathematics/Seven_Sketches_in_Compositionality%3A_An_Invitation_to_Applied_Category_Theory_(Fong_and_Spivak)/03%3A_Databases-_Categories_functors_and_(co)limits/3.02%3A_Categories
Jul 17, 2022 — For any graph G = (V, A, s, t), we can define a category Free(G), called the free category on G, whose objects are the vertices V and whose ...See more