This is pdfTeXk, Version 3.141592-1.40.3 (Web2C 7.5.6) (format=pdflatex 2007.5.18)  1 JAN 2013 18:57
entering extended mode
\write18 enabled.
 %&-line parsing enabled.
**1.3.heegner-points.tex
(./1.3.heegner-points.tex
LaTeX2e <2005/12/01>
Babel <v3.8h> and hyphenation patterns for english, usenglishmax, dumylang, noh
yphenation, arabic, basque, bulgarian, coptic, welsh, czech, slovak, german, ng
erman, danish, esperanto, spanish, catalan, galician, estonian, farsi, finnish,
 french, greek, monogreek, ancientgreek, croatian, hungarian, interlingua, ibyc
us, indonesian, icelandic, italian, latin, mongolian, dutch, norsk, polish, por
tuguese, pinyin, romanian, russian, slovenian, uppersorbian, serbian, swedish, 
turkish, ukenglish, ukrainian, loaded.
! Undefined control sequence.
l.4 \subsection
               {Heegner points}
? 
! Emergency stop.
l.4 \subsection
               {Heegner points}
End of file on the terminal!

 
Here is how much of TeX's memory you used:
 5 strings out of 94073
 166 string characters out of 1162984
 48804 words of memory out of 1500000
 3390 multiletter control sequences out of 10000+50000
 3640 words of font info for 14 fonts, out of 1200000 for 2000
 645 hyphenation exceptions out of 8191
 5i,0n,1p,73b,8s stack positions out of 5000i,500n,6000p,200000b,5000s
!  ==> Fatal error occurred, no output PDF file produced!