finding a fixed point for any lambda term.
+<a id=deriving-y></a>
## Deriving Y, a fixed point combinator ##
How shall we begin? Well, we need to find an argument to supply to
## Fixed-point Combinators Are a Bit Intoxicating ##
-[[tatto|/images/y-combinator-fixed.jpg]]
+[[tatto|/images/y-combinator-fixed.png]]
There's a tendency for people to say "Y-combinator" to refer to fixed-point combinators generally. We'll probably fall into that usage ourselves. Speaking correctly, though, the Y-combinator is only one of many fixed-point combinators.