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.
2.5 KB Views: 451