Editing History of topos theory (section)

{{more footnotes|date=August 2017}}
This article gives some very general background to the [[mathematical]] idea of [[topos]]. This is an aspect of [[category theory]], and has a reputation for being abstruse. The level of abstraction involved cannot be reduced beyond a certain point; but on the other hand context can be given. This is partly in terms of historical development, but also to some extent an explanation of differing attitudes to category theory. {{Citation needed|date=December 2016}}