diff --git a/math.tex b/math.tex
index bc28c08..3793ba1 100644
--- a/math.tex
+++ b/math.tex
@@ -31,7 +31,7 @@
 \newcommand{\intgr}[4]{\int_{#1}^{#2} #3 ~\text{d}#4}
 \newcommand{\intgru}[2]{\int #1 ~\text{d}#2}
 
-\newcommand{\bbracket}[1]{\left #1 \right}
+\newcommand{\sbk}[1]{\left( #1 \right)}
 
 \newcommand{\levicivita}[1]{\varEpsilon_{#1}}
 \newcommand{\krondelta}[1]{\delta_{+1}}
\ No newline at end of file