This is pdfTeXk, Version 3.141592-1.40.3 (Web2C 7.5.6) (format=pdflatex 2007.5.18)  30 OCT 2008 17:35
entering extended mode
 %&-line parsing enabled.
**pattern.tex
(./pattern.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.

! LaTeX Error: Environment slide undefined.

See the LaTeX manual or LaTeX Companion for explanation.
Type  H <return>  for immediate help.
 ...                                              
                                                  
l.3 \begin{slide}
                 {}
? 
! Emergency stop.
 ...                                              
                                                  
l.3 \begin{slide}
                 {}
Your command was ignored.
Type  I <command> <return>  to replace it with another command,
or  <return>  to continue without it.

 
Here is how much of TeX's memory you used:
 7 strings out of 94073
 263 string characters out of 1162984
 48804 words of memory out of 1500000
 3391 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,4p,35b,16s stack positions out of 5000i,500n,6000p,200000b,5000s
!  ==> Fatal error occurred, no output PDF file produced!