V. I. Kolyada

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Disogmus rasnitsyni Kolyada & Perkovsky, sp. n. is described from a fossil inclusion of Late Eocene amber (Ukraine). The new species is most similar to Disogmus basalis (Thomson, 1857), in particular, in the shape of the tyloids and the general shortening of the segments of antennae, but distinctly differs from it and the other species of the genus by(More)
We study the Lorentz spaces L p,s (R, µ) in the range 1 < p < s ≤ ∞, for which the standard functional ||f || p,s = ∞ 0 (t 1/p f * (t)) s dt t 1/s is only a quasi-norm. We find the optimal constant in the triangle inequality for this quasi-norm, which leads us to consider the following decomposition norm: ||f || (p,s) = inf k ||f k || p,s , where the(More)
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