On 12 Sep 2013, at 11:26, Johan Winge <johan.winge_at_telia.com> wrote:
> According to the autobiography of André Weil, quoted at http://jeff560.tripod.com/set.html, the empty set symbol ∅ was inspired by the Scandinavian Ø, and would then have nothing to do with the Greek phi, except for a superficial resemblance.
I confess I usually type a Danish Ø for convenience when I'm using this, though for publication I would tend to substitute the proper ∅.
Michael Everson * http://www.evertype.com/
Received on Thu Sep 12 2013 - 11:07:50 CDT
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