This is TeX, Version 3.14159 (Web2C 7.4.5) LaTeX2e <2001/06/01> Babel and hyphenation patterns for american, french, german, ngerman, b asque, italian, portuges, russian, spanish, nohyphenation, loaded. (./hmwk1.tex (/usr/share/texmf/tex/latex/base/article.cls Document Class: article 2001/04/21 v1.4e Standard LaTeX document class (/usr/share/texmf/tex/latex/base/size11.clo)) (/usr/share/texmf/tex/latex/srcltx/srcltx.sty) (./macros.tex (/usr/share/texmf/tex/latex/amsmath/amsmath.sty For additional information on amsmath, use the `?' option. (/usr/share/texmf/tex/latex/amsmath/amstext.sty (/usr/share/texmf/tex/latex/amsmath/amsgen.sty)) (/usr/share/texmf/tex/latex/amsmath/amsbsy.sty) (/usr/share/texmf/tex/latex/amsmath/amsopn.sty)) (/usr/share/texmf/tex/latex/amsfonts/amsfonts.sty) (/usr/share/texmf/tex/latex/amsfonts/amssymb.sty) (/usr/share/texmf/tex/latex/amscls/amsthm.sty)) (./hmwk1.aux) (/usr/share/texmf/tex/latex/cyrillic/ot2cmr.fd) (/usr/share/texmf/tex/latex/amsfonts/umsa.fd) (/usr/share/texmf/tex/latex/amsfonts/umsb.fd) ! LaTeX Error: Environment subprob undefined. See the LaTeX manual or LaTeX Companion for explanation. Type H for immediate help. ... l.41 \begin{subprob} ! LaTeX Error: \begin{enumerate} on input line 16 ended by \end{subprob}. See the LaTeX manual or LaTeX Companion for explanation. Type H for immediate help. ... l.45 \end{subprob} [1] (./hmwk1.aux) ) (see the transcript file for additional information) Output written on hmwk1.dvi (1 page, 2448 bytes). Transcript written on hmwk1.log.