From 2a977610502fd376ec4dec318fb5222bfbcbe4ee Mon Sep 17 00:00:00 2001
From: Yuchen Pei <me@ypei.me>
Date: Wed, 20 Mar 2019 10:43:00 +0100
Subject: more notations

---
 pages/notations.md | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/pages/notations.md b/pages/notations.md
index eb50bcc..2980a08 100644
--- a/pages/notations.md
+++ b/pages/notations.md
@@ -47,3 +47,7 @@ elsewhere.
     have the same distribution.
 -   $\mathbb E f(\xi)$: expectation of $f(\xi)$.
 -   $\mathbb P(A)$: probability of event $A$.
+-   $a \wedge b$: $\min\{a, b\}$.
+-   $a \vee b$: $\max\{a, b\}$.
+-   $(\alpha)_+$: the positive part of $\alpha$, i.e. $\alpha \vee 0$.
+-   $(\alpha)_-$: the negative part of $\alpha$, i.e. $(- \alpha)_+$.
-- 
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