This is TeX, Version 3.1415 (C version 6.1) (format=lplain 94.6.25)  29 JUN 1995 13:05
**25548_images.tex
(25548_images.tex
LaTeX Version 2.09 <14 January 1992>

(/u/tex/lib/inputs/article.sty
Document Style `article' <16 Mar 88>.
(/u/tex/lib/inputs/art12.sty)
\c@part=\count79
\c@section=\count80
\c@subsection=\count81
\c@subsubsection=\count82
\c@paragraph=\count83
\c@subparagraph=\count84
\c@figure=\count85
\c@table=\count86
)
No file 25548_images.aux.
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! Display math should end with $$.
<to be read again> 
                   U
l.56 {\samepage \clearpage \begin{displaymath}$U
                                                \end{displaymath}
The `$' that I just saw supposedly matches a previous `$$'.
So I shall assume that you typed `$$' both times.

LaTeX error.  See LaTeX manual for explanation.
              Type  H <return>  for immediate help.
! Bad math environment delimiter.
\@latexerr ...for immediate help.}\errmessage {#1}
                                                  
\]...finner \@badmath \else $$\fi \else \@badmath 
                                                  \fi \ignorespaces 
\enddisplaymath ->\]
                    \global \@ignoretrue 
\end #1->\csname end#1\endcsname 
                                 \@checkend {#1}\expandafter \endgroup \if@e...
l.56 ...age \begin{displaymath}$U\end{displaymath}
                                                  
Your command was ignored. 
Type  I <command> <return>  to replace it with another command,
or  <return>  to continue without it.

[3

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] (25548_images.aux) ) 
Here is how much of TeX's memory you used:
 160 strings out of 11769
 1528 string characters out of 77477
 26715 words of memory out of 262141
 2315 multiletter control sequences out of 9500
 18987 words of font info for 72 fonts, out of 100000 for 255
 14 hyphenation exceptions out of 607
 16i,4n,15p,157b,74s stack positions out of 300i,40n,60p,3000b,4000s

Output written on 25548_images.dvi (4 pages, 528 bytes).