On von Neumann algebras which are complemented subspaces of B(H)
classification
funct-an
math.OA
keywords
boundedexistsneumannprojectiontherealgebraalgebrascomplemented
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If there exists a completely bounded projection of B(H) onto a von Neumann algebra M on H, then M is injective. If there exists a bounded projection and M is properly infinite, the same conclusion holds.
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