This is TeX, Version 3.14159 (MiKTeX 1.20d) (preloaded format=latex 1999.11.13) 20 NOV 1999 15:22 **itr_01.tex (itr_01.tex LaTeX2e <1998/12/01> patch level 1 Babel and hyphenation patterns for american, french, german, ngerman, n ohyphenation, loaded. ! Undefined control sequence. l.7 \section {Classic Iterative Methods} ? x No pages of output.