Half-Sided Translations and tye Type of von Neumann Algebras

Half-Sided Translations and tye Type of von Neumann Algebras
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冯·诺依曼代数的半边平移和类型

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发表时间:
1998
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通讯作者:
H. Borchers
H. Borchers
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文献类型:
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作者:
H. Borchers

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设M是作用在Hilbert空间H上的von Neumann代数,Ω∞ H是M的循环分离向量.若M存在半边平移,即连续酉群U(t)满足U(t)Ω=Ω,非负谱满足Ad U(t)M <$M(t≥ 0或≤ 0),则我们证明M是III 1型或U(t)是平凡的。
Let M be a von Neumann algebra acting on a Hilbert space H and Ω∞ H a cyclic and separating vector for M. If there exists a half-sided translation for M, i.e. a continuous unitary group U(t) with U(t)Ω=Ω, a non-negative spectrum fulfilling Ad U(t)M ⊂ M for t≥ 0 (or ≤ 0), then we will show that either M is of type III1 or U(t) is trivial.