. . "Hilbert, Dirichlet and Fejer families of operators arising from C_0-groups, cosine functions and holomorphic semigroups"@en . "000273470300003" . "RIV/00216208:11320/10:10057460!RIV11-MSM-11320___" . "Z(MSM0021620839)" . "semigroups; hholomorphic; and; functions; cosine; C_0-groups,; from; arising; operators; families; Fejer; and; Dirichlet; Hilbert,"@en . "Semigroup Forum" . . "Miana, Pedro J." . . "RIV/00216208:11320/10:10057460" . "Hilbert, Dirichlet and Fejer families of operators arising from C_0-groups, cosine functions and holomorphic semigroups" . "261619" . . "[8B50FBB60D24]" . . "0037-1912" . "28"^^ . . . "80" . . "Fa\u0161angov\u00E1, Eva" . . . . . "Hilbert, Dirichlet and Fejer families of operators arising from C_0-groups, cosine functions and holomorphic semigroups"@en . . . "DE - Spolkov\u00E1 republika N\u011Bmecko" . "2"^^ . "Hilbert, Dirichlet and Fejer families of operators arising from C_0-groups, cosine functions and holomorphic semigroups" . . "1"^^ . "We extend definitions of Hilbert transform, Dirichlet and Fejer operators from convolution with kernels in Lebesgue spaces to Banach spaces. In these terms the geometric property UMD is characterized. A unified approach, and relationship to group and semigroup cases, are presented."@en . . . . "We extend definitions of Hilbert transform, Dirichlet and Fejer operators from convolution with kernels in Lebesgue spaces to Banach spaces. In these terms the geometric property UMD is characterized. A unified approach, and relationship to group and semigroup cases, are presented." . . . . "11320" . "1" . . . .