Перегляд за автором "Savchuk, Y."

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  • C*-algebra generated by four projections with sum equal to 2 
    Savchuk, Y. (Algebra and Discrete Mathematics, 2004)
    We describe the C*-algebra generated by four orthogonal projections p₁,p₂,p₃,p₄, satisfying the linear relation p₁ + p₂ + p₃ + p₄ = 2I. The simplest realization by 2 × 2-matrixfunctions over the sphere S² is given.