This is pdfeTeX, Version 3.141592-1.21a-2.2 (Web2C 7.5.4) (format=latex 2006.11.27) 31 JAN 2007 01:06 entering extended mode **TriangleNotSquare.tex (./TriangleNotSquare.tex LaTeX2e <2003/12/01> Babel and hyphenation patterns for american, french, german, ngerman, b ahasa, basque, bulgarian, catalan, croatian, czech, danish, dutch, esperanto, e stonian, finnish, greek, icelandic, irish, italian, latin, magyar, norsk, polis h, portuges, romanian, russian, serbian, slovak, slovene, spanish, swedish, tur kish, ukrainian, nohyphenation, loaded. 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Undefined control sequence. l.200 ...{{2}}+q^{{2}};\text{ }2\normalsubformula {\text{pq}};\text{ ? ! Undefined control sequence. l.231 ${\normalsubformula {\text{pq}}(p^{{2}}-q^{{2}})}$ ? ! Undefined control sequence. l.241 ...{{2}}+q^{{2}};\text{ }2\normalsubformula {\text{pq}};\text{ ? ! Undefined control sequence. l.253 So the expression ${\normalsubformula {\text{pq}}(p^{{2}}-q^{{2}})}$ ? ! Undefined control sequence. l.261 ${\normalsubformula {\text{pq}}=b^{{2}};\text{ }p=d^{{2}};\text{ ? Underfull \hbox (badness 10000) has occurred while \output is active \T1/cmr/m/n/12 [Warning: Draw object ignored] [] [2] ! Undefined control sequence. l.395 ...}=(k^{{2}}-2m^{{2}})+2(2\normalsubformula {\text{mk}})^{{2}}}$ ? Underfull \hbox (badness 10000) has occurred while \output is active \T1/cmr/m/n/12 [Warning: Draw object ignored] [] [3] Runaway argument? { ! Paragraph ended before \text@ was complete. \par l.497 ? ! Missing $ inserted. $ l.497 ? ! Missing } inserted. } l.497 ? ! Missing $ inserted. $ l.498 }k^ {{2}}=p^{{\text{{\textquotesingle}}2}}-q^{{\text{{\textquotesingle}... ? q OK, entering \batchmode... ! Extra }, or forgotten $. l.499 ...tquotesingle}}q\text{{\textquotesingle}}} $ I've deleted a group-closing symbol because it seems to be spurious, as in `$x}$'. But perhaps the } is legitimate and you forgot something else, as in `\hbox{$x}'. In such cases the way to recover is to insert both the forgotten and the deleted material, e.g., by typing `I$}'. ! Too many }'s. l.500 \par} You've closed more groups than you opened. Such booboos are generally harmless, so keep going. Underfull \hbox (badness 10000) has occurred while \output is active \T1/cmr/m/n/12 [Warning: Draw object ignored] [] [4] ! Undefined control sequence. \normalsubformula {\text {ab}} l.627 ${\frac{\normalsubformula{\text{ab}}}{2} =x^{{2}}}$ , the process The control sequence at the end of the top line of your error message was never \def'ed. If you have misspelled it (e.g., `\hobx'), type `I' and the correct spelling (e.g., `I\hbox'). Otherwise just continue, and I'll forget about whatever was undefined. Underfull \hbox (badness 10000) has occurred while \output is active \T1/cmr/m/n/12 [Warning: Draw object ignored] [] [5] (./TriangleNotSquare.aux) ) Here is how much of TeX's memory you used: 4188 strings out of 94500 54896 string characters out of 1172832 108471 words of memory out of 3500000 7293 multiletter control sequences out of 10000+50000 18802 words of font info for 55 fonts, out of 500000 for 2000 580 hyphenation exceptions out of 1000 27i,10n,24p,406b,302s stack positions out of 1500i,500n,5000p,200000b,5000s Output written on TriangleNotSquare.dvi (5 pages, 27280 bytes).