Waldhausen Category: Zero Object, Cofibration, Isomorphism, Pushout

Skeleton (Category Theory): Mathematics, Category Theory), Subcategory, Isomorphism, Iff, Isomorphism of Categories

Pushout (category theory)

Symplectomorphism: Mathematics, Isomorphism, Category (Mathematics), Symplectic Manifold

Simplicial Category: Mathematics, Category Theory, Set, Morphisms, Object, Presheaf, Monoidal Category, Monoid Object