From a96554f290c5878a567cfd4e3399d0729ab25030 Mon Sep 17 00:00:00 2001 From: Jim Pryor Date: Wed, 15 Sep 2010 17:09:46 -0400 Subject: [PATCH 1/1] week1 tweaks Signed-off-by: Jim Pryor --- week1.mdwn | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/week1.mdwn b/week1.mdwn index 67d5828d..ad6f98c4 100644 --- a/week1.mdwn +++ b/week1.mdwn @@ -185,7 +185,7 @@ Different authors use different notations. Some authors use the term "contractio M ~~> N -We'll mean that you can get from M to N by one or more reduction steps. Hankin uses the symbol → for one-step contraction, and the symbol &8608; for zero-or-more step reduction. Hindley and Seldin use ⊳1 and ⊳. +We'll mean that you can get from M to N by one or more reduction steps. Hankin uses the symbol → for one-step contraction, and the symbol ↠ for zero-or-more step reduction. Hindley and Seldin use ⊳1 and ⊳. When M and N are such that there's some P that M reduces to by zero or more steps, and that N also reduces to by zero or more steps, then we say that M and N are **beta-convertible**. We'll write that like this: -- 2.11.0