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It’s a paradox that has long vexed researchers in the field of optics.To control a light source, another light source that uses as much energy — if not more — is often required. The setup works, but i...
Enriched weakness
2010/12/1
The basic notions of category theory, such as limit, adjunction, and orthogonality, all involve
assertions of the existence and uniqueness of certain arrows. Weak notions arise when one drops
the un...