"16"^^ . . "197" . "Let T be an n-tuple of bounded linear operators on a complex Hilbert space H. Then there exists an n-tuple K of compact operators such that the essential numerical range of T equals to the closure of the numerical range of T+K. This generalices the corresponding resoult for n=1. The result is also applied to the Olsen problem." . . "M\u00FCller, Vladim\u00EDr" . . "3" . "The joint essential numerical range, compact perturbations, and the Olsen problem" . . "0039-3223" . . . "[CA8855DF5966]" . "1"^^ . . "The joint essential numerical range, compact perturbations, and the Olsen problem"@en . "000277765100005" . "P(GA201/09/0473), P(IAA100190903), Z(AV0Z10190503)" . . "The joint essential numerical range, compact perturbations, and the Olsen problem" . . . "PL - Polsk\u00E1 republika" . "RIV/67985840:_____/10:00342843" . "1"^^ . "Studia mathematica" . "joint essential numerical range; joint numerical range; compact perturbation; Olsen's problem"@en . "265591" . . . "RIV/67985840:_____/10:00342843!RIV11-GA0-67985840" . . . "The joint essential numerical range, compact perturbations, and the Olsen problem"@en . . . "Let T be an n-tuple of bounded linear operators on a complex Hilbert space H. Then there exists an n-tuple K of compact operators such that the essential numerical range of T equals to the closure of the numerical range of T+K. This generalices the corresponding resoult for n=1. The result is also applied to the Olsen problem."@en . . . .