===== Natural isomorphism =====
==== Collection ====
| @#55CCEE: context     | @#55CCEE: $F,G$ in ${\bf C}\longrightarrow{\bf D}$ |
| @#FFBB00: definiendum | @#FFBB00: $\eta$ in $F\cong G$ |
| @#AAFFAA: inclusion   | @#AAFFAA: $\eta$ in $F\xrightarrow{\bullet}G$ |
| @#FFFDDD: for all     | @#FFFDDD: $A:\mathrm{Ob}_{\bf C}$ |
| @#55EE55: postulate   | @#55EE55: $\eta_A$ ... isomorphsim |

==== Discussion ====
=== Reference ===
Wikipedia: [[http://en.wikipedia.org/wiki/Natural_transformation|Natural transformation]]
==== Parents ====
=== Context ===
[[Functor]]
=== Requirements ===
[[Natural transformation]], [[Isomorphism]]