Summary

This is an adaptation of the initial diagram https://en.wikipedia.org/wiki/File:Functor.svg by user https://commons.wikimedia.org/wiki/User:Adamant.pwn , shared under the Creative Commons Attribution-Share Alike 4.0 International license.

My only contribution is that I changed the names of the variables to match the notations used in the page https://en.wikipedia.org/wiki/Functor

Licensing

I, the copyright holder of this work, hereby publish it under the following license:

This file is licensed under the Creative Commons Attribution-Share Alike 4.0 International license.

You are free:

• to share – to copy, distribute and transmit the work
• to remix – to adapt the work

Under the following conditions:

• attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
• share alike – If you remix, transform, or build upon the material, you must distribute your contributions under the same or compatible license as the original.

https://creativecommons.org/licenses/by-sa/4.0 CC BY-SA 4.0 Creative Commons Attribution-Share Alike 4.0 true true