Università degli Studi di Genova
This paper deals with Kan extensions in a weak double category. Absolute Kan extensions are closely related to the orthogonal adjunctions introduced in a previous paper. The pointwise case is treated by introducing internal comma objects, which can be defined in an arbitrary double category.
Weak double category, weak double functor, Kan extension, adjoint functor, comma object
Pubblicato su: Theory and Applications of Categories Vol. 20 (2008) N. 8 Pag. 152-185