entropy.log

This is pdfTeX, Version 3.14159265-2.6-1.40.17 (TeX Live 2016) (preloaded format=pdflatex 2016.11.10)  11 JAN 2017 17:17
entering extended mode
 restricted \write18 enabled.
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**entropy.tex
(./entropy.tex
LaTeX2e <2016/03/31>
Babel <3.9r> and hyphenation patterns for 22 language(s) loaded.
! Undefined control sequence.
l.1 \section
            {Entropy}
? 
! Emergency stop.
l.1 \section
            {Entropy}
End of file on the terminal!

 
Here is how much of TeX's memory you used:
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 127 string characters out of 6166765
 47243 words of memory out of 5000000
 3441 multiletter control sequences out of 15000+600000
 3640 words of font info for 14 fonts, out of 8000000 for 9000
 319 hyphenation exceptions out of 8191
 5i,0n,1p,31b,8s stack positions out of 5000i,500n,10000p,200000b,80000s
!  ==> Fatal error occurred, no output PDF file produced!