forgetful functor
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drops some or all of the input's structure or properties
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Connections
strict 2-category
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limit
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universal property
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adjoint functor
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full and faithful functor
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category of rings
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higher category theory
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mathematics
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International Standard Book Number
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function
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set
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group
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ring
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isomorphism
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topological space
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abelian group
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algebraic structure
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category theory
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basis
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module
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