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Idempotent comultiplications on graded algebras

✍ Scribed by Alberto Cavicchioli; Mauro Meschiari

Book ID
104641667
Publisher
Springer
Year
1992
Tongue
English
Weight
827 KB
Volume
41
Category
Article
ISSN
0046-5755

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Let M n be the algebra of all n Γ— n complex matrices and P n the set of all idempotents in M n . Suppose Ο† : M n β†’ M n is a surjective map satisfying A -Ξ»B ∈ P n if and only if