X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ian/git?p=topbloke-formulae.git;a=blobdiff_plain;f=notation.tex;h=b6b4a8cc814c01ffdb9076320796fbadfbc4bfbd;hp=929fece5a77de97db101045c72db74c5c13662c6;hb=35d8920c70badf3ea6556ad6cf53ea96ef6aec0c;hpb=f3f813bac72c13ef2284335346d02443d2f09f87

diff --git a/notation.tex b/notation.tex
index 929fece..b6b4a8c 100644
--- a/notation.tex
+++ b/notation.tex
@@ -7,6 +7,9 @@ at the outermost level.
 \desclabelwidth{5em}
 \desclabelstyle{\nextlinelabel}
 }
+\item[ $ C \hasparent D $ ]
+Commit $C$ has commit $D$ as (one of) its parents.
+
 \item[ $ C \hasparents \set X $ ]
 The parents of commit $C$ are exactly the set
 $\set X$.
@@ -14,7 +17,7 @@ $\set X$.
 \item[ $ C \ge D $ ]
 $C$ is a descendant of $D$ in the git commit
 graph.  This is a partial order, namely the transitive closure of
-$ D \in \set X $ where $ C \hasparents \set X $.
+$ \hasparent $.
 
 \item[ $ C \has D $ ]
 Informally, the tree at commit $C$ contains the change