Linked from
The 65 pages that link to Holomorphic function, each with the reason it gives.
Modular formNarrower topic: Holomorphy is a defining analytic condition for modular forms.
Entire functionNarrower topic: Entire functions are holomorphic on the whole complex plane.
Liouville's theoremNarrower topic: The theorem belongs to the theory of holomorphic functions.
Hurwitz's theoremNarrower topic: Hurwitz's theorem concerns limits within this class of functions.
Koebe quarter theoremNarrower topic: The theorem concerns holomorphic maps of the unit disk.
Carlson's theoremNarrower topic: Entire functions are holomorphic on the whole complex plane.