Concepts
2-group
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Concepts
2-group
monoidal category in which every morphism is invertible and every object has a weak inverse; categorification of the notion of a group
uncommon · Q4596948
Related cards · monoid object
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Concepts
Monoid
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Monad (category theory)
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Monoidal category
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Cartesian closed category
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Category of sets
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Group object
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Related cards · process
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Dark history
1968 Thule Air Base B-52 crash
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Dark history
1966 Palomares accident
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Concepts
180-degree rule
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Meta topics
2018 Moscow–Constantinople schism
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2022 Russian mobilization
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2018 Amesbury poisonings
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