gistfile1.aux

\documentclass[letter,twocolumn,twoside,mathserif,10pt]{book}
\usepackage[left=2cm,right=2cm,top=2cm,bottom=1.8cm]{geometry}
\usepackage{graphicx}
\usepackage{fourier}
\usepackage[latin1]{inputenc}
\usepackage[T1]{fontenc}
\usepackage{float}
\usepackage{fancyhdr}
\usepackage{fancybox}

\pagestyle{fancy}
\fancyhead{} % clear all header fields
\fancyhead[LO]{\includegraphics[width=2in]{davincilogo2009.pdf}}
\fancyhead[HR]{\Ovalbox{\bfseries\Large GMA102: Números Enteros}}
\fancyfoot{} % clear all footer fields
\fancyfoot[LE,RO]{\thepage}
\fancyfoot[LO,CE]{\bfseries GMA102}
\fancyfoot[CO,RE]{\bfseries DaVinci PreUniversitario}
\renewcommand{\headrulewidth}{0pt}
\renewcommand{\footrulewidth}{0.4pt}
\def\NN{\mathbb{N}}