289 research outputs found
When coproducts are biproducts
Among right-closed monoidal categories with finite coproducts, we
characterise those with finite biproducts as being precisely those in which the
initial object and the coproduct of the unit with itself admit right duals.
This generalises Houston's result that any compact closed category with finite
coproducts admits biproducts.Comment: 4 pages; final journal versio
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