An adjuction between infinity categories consists of:

  • A pair of infinity categories A,B
  • A pair of functors ,
  • A pair of natural transformations ,
    Such that,

    Write to mean that is left-adjoint and is right-adjoint.

Properties

Adjunctions compose.
Equivalence of categories preserve adjunctions.
Equivalence of functors preserve adjunctions.
The left adjunction of a morphism is unique up to equivalence.
If and is an equivalence then is also an equivalence.