\relax \catcode`"\active \select@language{spanish} \@writefile{toc}{\select@language{spanish}} \@writefile{lof}{\select@language{spanish}} \@writefile{lot}{\select@language{spanish}} \@writefile{toc}{\contentsline {section}{\numberline {1}Complejos de cadena}{2}} \@writefile{toc}{\contentsline {section}{\numberline {2}Homolog\IeC {\'\i }a}{2}} \@writefile{toc}{\contentsline {section}{\numberline {3}La caracter\IeC {\'\i }stica de Euler de un complejo}{2}} \@writefile{toc}{\contentsline {section}{\numberline {4}Mayer-Vietoris}{4}} \@writefile{toc}{\contentsline {subsection}{\numberline {4.1}Aplicaci\'on al c\'alculo de caracter\IeC {\'\i }stica de Euler}{4}} \@writefile{toc}{\contentsline {subsection}{\numberline {4.2}Ejemplos}{5}} \@writefile{toc}{\contentsline {section}{\numberline {5}El teorema de Gauss-Bonnet}{8}} \@writefile{toc}{\contentsline {subsection}{\numberline {5.1}Enunciado}{8}} \@writefile{toc}{\contentsline {subsection}{\numberline {5.2}''Frames'' y conexi\'on con 1-formas}{8}} \@writefile{toc}{\contentsline {subsection}{\numberline {5.3}F\'ormulas estructurales en general}{9}} \@writefile{toc}{\contentsline {subsection}{\numberline {5.4}F\'ormulas estructurales para $S\subset \@mathbb {R}^3$}{9}} \@writefile{toc}{\contentsline {subsection}{\numberline {5.5}Demostraci\'on de la version local para un tri\'angulo o cuadrado}{11}}