object of a category
constituent element of the mathematical notion of category
injective object
object 𝑋 in an abelian category such that hom(–,𝑋) is an exact functor to the opposite category of the category of abelian groups
projective object
object 𝑃 in an abelian category such that hom(𝑃,–) is an exact functor to the category of abelian groups
initial and terminal objects
objects used in category theory branch of mathematics
product
generalized object in category theory
scheme
object of algebraic geometry, commutative algebra and number theory; a ringed space locally isomorphic to the spectrum of a commutative ring