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Pullback : Index
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internalUseDirectSum
-- Compute direct sum of two rings.
internalUseDirectSum(Ring,Ring)
-- Compute direct sum of two rings.
Pullback
-- pullback in the category of rings
pullback
-- Compute the pullback of a diagram of rings
pullback(...,Verbose=>...)
-- Compute the pullback of a diagram of rings
pullback(RingMap,RingMap)
-- Compute the pullback of a diagram of rings