From: jim Date: Fri, 20 Feb 2015 18:29:40 +0000 (-0500) Subject: markup X-Git-Url: http://lambda.jimpryor.net/git/gitweb.cgi?p=lambda.git;a=commitdiff_plain;h=26c6874795933a9609ac336db9bf19e18ac357de markup --- diff --git a/exercises/_assignment4.mdwn b/exercises/_assignment4.mdwn index 38e3180f..f5e22c75 100644 --- a/exercises/_assignment4.mdwn +++ b/exercises/_assignment4.mdwn @@ -107,7 +107,7 @@ satisfies the following constraints, for any finite natural number `n`: n ^ inf == inf leq n inf == true - (Note, though, that with *some* notions of infinite numbers, like [[!wiki ordinal numers]], operations like `+` and `*` are defined in such a way that `inf + n` is different from `n + inf`, and does exceed `inf`.) + (Note, though, that with *some* notions of infinite numbers, like [[!wikipedia ordinal numbers]], operations like `+` and `*` are defined in such a way that `inf + n` is different from `n + inf`, and does exceed `inf`.) 9. Prove that `add ξ 1 <~~> ξ`, where `ξ` is the fixed point you found in (1). What about `add ξ 2 <~~> ξ`?