In the topos entry of wikipedia, says:
there is an example due to Pierre Deligne of a nontrivial topos that has no points (see below for the definition of points of a topos).
I'm looking for the reference of this example.
In the topos entry of wikipedia, says:
there is an example due to Pierre Deligne of a nontrivial topos that has no points (see below for the definition of points of a topos).
I'm looking for the reference of this example.
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