This is TeX, Version 3.1415 (C version 6.1) (format=lplain 94.6.25)  16 NOV 1995 14:58
**1004_images.tex
(1004_images.tex
LaTeX Version 2.09 <14 January 1992>

(/u/tex/inputs/article.sty
Document Style `article' <16 Mar 88>.
(/u/tex/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 1004_images.aux.
[1


]
! Undefined control sequence.
<argument> \psfig 
                  {figure=bell.ps,height=2in,width=3in,clip=}
\centerline #1->\@@line {\hss #1
                                \hss }
l.25 ...igure=bell.ps,height=2in,width=3in,clip=}}
                                                  
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.

[2]
! Display math should end with $$.
<to be read again> 
                   (
l.32 {\samepage \clearpage \begin{displaymath}$(
                                                -1,+1)\end{displaymath}
The `$' that I just saw supposedly matches a previous `$$'.
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.32 ...egin{displaymath}$(-1,+1)\end{displaymath}
                                                  
Your command was ignored. 
Type  I <command> <return>  to replace it with another command,
or  <return>  to continue without it.

[3

]
! Display math should end with $$.
<to be read again> 
                   (
l.38 {\samepage \clearpage \begin{displaymath}$(
                                                -2,+2)\end{displaymath}
The `$' that I just saw supposedly matches a previous `$$'.
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.38 ...egin{displaymath}$(-2,+2)\end{displaymath}
                                                  
Your command was ignored. 
Type  I <command> <return>  to replace it with another command,
or  <return>  to continue without it.

[4

] (1004_images.aux) ) 
Here is how much of TeX's memory you used:
 155 strings out of 11769
 1473 string characters out of 77477
 26488 words of memory out of 262141
 2310 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,156b,99s stack positions out of 300i,40n,60p,3000b,4000s

Output written on 1004_images.dvi (4 pages, 888 bytes).