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``Re: where is notation defined?'' by lars_h on 2005-08-22 05:59:22
Yes, it means "covers".

My apologies if this was unclear, but I mostly
wrote down a quick definition of semimodular
lattice so that I could refer to it in a correction
posted to "incidence geometry". This may well
have been an end left loose in it.

I have (off-line) a half-finished entry
which defines this (and much other notation
for relations), which I have intended to
complete for a couple of weeks now, but I have
gotten sidetracked by work.
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