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category_theory.limits.preserves.opposites

Limit preservation properties of functor.op and related constructions #

We formulate conditions about F which imply that F.op, F.unop, F.left_op and F.right_op preserve certain (co)limits.

Future work #

If F : C ⥤ D preserves colimits of shape Jᵒᵖ, then F.op : Cᵒᵖ ⥤ Dᵒᵖ preserves limits of shape J.

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If F : Cᵒᵖ ⥤ D preserves colimits of shape Jᵒᵖ, then F.right_op : C ⥤ Dᵒᵖ preserves limits of shape J.

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If F : Cᵒᵖ ⥤ Dᵒᵖ preserves colimits of shape Jᵒᵖ, then F.unop : C ⥤ D preserves limits of shape J.

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If F : C ⥤ D preserves limits of shape Jᵒᵖ, then F.op : Cᵒᵖ ⥤ Dᵒᵖ preserves colimits of shape J.

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