Remark on edge densities.

[saga.git] / notation.tex

diff --git a/notation.tex b/notation.tex
index 12cf520d559fb6992842d7390d10ba1125a379de..3c63ac2dbe73f1bf5f52ddee11acfd457c612972 100644 (file)
--- a/notation.tex
+++ b/notation.tex
@@ -9,6 +9,7 @@
 \def\[#1]{[\ref{#1}]}
 \n{$\bb R$}{the set of all real numbers}
 \n{$\bb N$}{the set of all natural numbers, including 0}
+\n{${\bb N}^+$}{the set of all positive integers}
 \n{$T[u,v]$}{the path in a tree~$T$ joining vertices $u$ and $v$ \[heavy]}
 \n{$T[e]$}{the path in a tree~$T$ joining the endpoints of an~edge~$e$ \[heavy]}
 \n{$A\symdiff B$}{symetric difference of sets: $(A\setminus B) \cup (B\setminus A)$}