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Symbol in Alan Turing's On Computable Numbers

  1. Jan 21, 2015 #1
    In Alan Turing's On Computable Numbers, he explains in his second paragraph the general notion of computable numbers. In doing so, he writes "In [symbol][symbol] 9, 10 I give some arguments...". I will include a screenshot of these symbols in this post. Do any of you know what these symbols mean? I guessing they are just some way of citing his paper "9, 10" which I also have no idea of. He uses this notation throughout the paper so if you happen to know the papers he is refering to, please enlighten me. Thank you.

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  2. jcsd
  3. Jan 21, 2015 #2


    Staff: Mentor

  4. Jan 21, 2015 #3


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    Staff: Mentor

    He's just saying (in shorthand notation) "In sections 9 and 10 I give some arguments..." Presumably these are sections of the same book, unless he refers explicitly to a different book.
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