This is pdfTeX, Version 3.1415926-2.3-1.40.12 (TeX Live 2011) (format=pdflatex 2011.7.3)  7 MAR 2016 12:10
entering extended mode
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**DETECTION_2.tex
(./DETECTION_2.tex
LaTeX2e <2009/09/24>
Babel <v3.8l> and hyphenation patterns for english, dumylang, nohyphenation, ge
rman-x-2009-06-19, ngerman-x-2009-06-19, afrikaans, ancientgreek, ibycus, arabi
c, armenian, basque, bulgarian, catalan, pinyin, coptic, croatian, czech, danis
h, dutch, ukenglish, usenglishmax, esperanto, estonian, ethiopic, farsi, finnis
h, french, galician, german, ngerman, swissgerman, monogreek, greek, hungarian,
 icelandic, assamese, bengali, gujarati, hindi, kannada, malayalam, marathi, or
iya, panjabi, tamil, telugu, indonesian, interlingua, irish, italian, kurmanji,
 lao, latin, latvian, lithuanian, mongolian, mongolianlmc, bokmal, nynorsk, pol
ish, portuguese, romanian, russian, sanskrit, serbian, serbianc, slovak, sloven
ian, spanish, swedish, turkish, turkmen, ukrainian, uppersorbian, welsh, loaded
.
./DETECTION_2.tex:3: Undefined control sequence.
l.3 \chapter
            {The $M$-ary hypothesis testing problem}
? 
./DETECTION_2.tex:3: Emergency stop.
l.3 \chapter
            {The $M$-ary hypothesis testing problem}
End of file on the terminal!

 
Here is how much of TeX's memory you used:
 5 strings out of 493633
 142 string characters out of 3143378
 49245 words of memory out of 3000000
 3405 multiletter control sequences out of 15000+200000
 3640 words of font info for 14 fonts, out of 3000000 for 9000
 831 hyphenation exceptions out of 8191
 5i,0n,1p,66b,8s stack positions out of 5000i,500n,10000p,200000b,50000s
./DETECTION_2.tex:3:  ==> Fatal error occurred, no output PDF file produced!