* products preserve epis of locales
@ 2008-07-22 13:35 Paul Taylor
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From: Paul Taylor @ 2008-07-22 13:35 UTC (permalink / raw)
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Where can I find a published proof that
if X --->> Y is a (not necessarily regular) epi of locales
then so is X x Z --->> Y x Z for any locale Z?
NB (I know that) this is not true for general pullbacks of locales!
Ideally, I'd like to cite a textbook-style account that begins by
characterising epis and regular monos as idempotent adjunctions,
saying that they form a factorisation system, and describes the
product of locales fairly explicitly.
Paul
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2008-07-22 13:35 products preserve epis of locales Paul Taylor
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