add part for coarse index theory + appendix fix

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Status Job ID Name Coverage
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failed #276061
latex
generate_pdf

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latex
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Name Stage Failure
failed
generate_pdf Build
      Refer to 'atiyah_singer.log' for details
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This message may duplicate earlier message.
Latexmk: Failure in processing file 'atiyah_singer.tex':
(Pdf)LaTeX didn't generate the expected log file 'atiyah_singer.log'
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=== TeX engine is 'LuaTeX'
Latexmk: Errors, in force_mode: so I tried finishing targets
ERROR: Job failed: exit status 1