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The Role of Metallacycles in the Chromium-Catalyzed Trimerization of Ethylene
η5-Cyclopentadienyl-stabilized metallacyclopentane and -cycloheptane derivatives of chromium have been isolated, and their chemical behavior lends support to a metallacyclic mechanism for theExpand
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Minimization of the Variance. A Method for Two-Sided Bounds for Eigenvalues of Selfadjoint Operators
Let H be a selfadjoint operator in a Hilbert-Space ℋ, D H the domain of H, σ(H) the spectrum and ϱ(H) the resolvent set of if. From the spectral theorem of selfadjoint operators for each v ∈ ℋ and uExpand
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