diff --git a/style.tex b/style.tex
index 3eed276..79082ab 100644
--- a/style.tex
+++ b/style.tex
@@ -131,6 +131,19 @@ depth -0.5ex\hfill}\newcommand{\innerhead}[1]{\def\lp@innerhead{#1}}
 \newtheorem{definition}{Definition:}
 \newtheorem*{summary}{Summary:}
 
+
+%
+\newcommand{\Fam}{{\mathbb F}}
+\newcommand{\Pow}{{\mathbb P}}
+\newcommand{\Dis}{{\vee}}
+\newcommand{\Con}{{\wedge}}
+\newcommand{\FMEA}{{\bowtie}}
+%
+\newcommand{\Nat}{{\mathbb N}}
+\newcommand{\Real}{{\mathbb R}}
+\newcommand{\Complex} {{\mathbb C}}
+\newcommand{\Rational} {{\mathbb Q}}
+%
 %\newenvironment{example}
 %{ \stepcounter{examplec} \vspace{10pt} \normalfont\bfseries Example:(\arabic{chapter}.\arabic{examplec})
 %  \normalfont \begin{quote}}{\end{quote}\par}