Zeitschrift für Analysis und ihre Anwendungen Vol. 18, No. 3, pp. 713-732 (1999) |
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A Compactness Criterion of Mixed Krasnoselski{\u\i}-Riesz Type in Regular Ideal Spaces of Vector FunctionsM. VäthM. Väth: University of Würzburg, Department of Mathematics, Am Hubland, D-97074 Würz\-burg; \ e-mail: vaeth@cip.mathematik.uni-wuerzburg.deAbstract: We present a compactness criterion in ideal spaces of vector-valued functions. In the case of real functions, the criterion gives a precise formula for the measure of non-compactness. In the Lebesgue-Bochner spaces $L_p(\R^n,U)$ the result can be interpreted as a Riesz compactness criterion and generalizes a theorem of Orlicz and Szufla. Keywords: riesz compactness criterion, Krasnoselski{\u\i} compactness criterion, ideal spaces, K{ö}the spaces, Banach function spaces, spaces of measurable functions, vector-valued functions Classification (MSC2000): 46E30, 46E40, 45N10, 46G10 Full text of the article:
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