> For some purpose e.g. without going into set theoretic fundamentals to build u... | Hacker News

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		posterboy on June 25, 2017 \| parent \| context \| favorite \| on: Common Errors in Undergraduate Mathematics (2009) > For some purpose e.g. without going into set theoretic fundamentals to build up ordered sets.

madez on June 26, 2017 [–]

That is not necessary, at all. One can always just literally write "the list of ascendingly ordered integers that are greater or equal to 1 and smaller or equal to n". The introduction of formal notation is just a shortcut.

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