Journal of Sciences, Islamic Republic of Iran
CHEBYSHEV SUBALGEBRAS OF JB-ALGEBRAS
Abstract
In this note, we characterize Chebyshev subalgebras of unital JB-algebras. We
exhibit that if B is Chebyshev subalgebra of a unital JB-algebra A, then either B is a
trivial subalgebra of A or A= H R .l, where H is a Hilbert space
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