Abstract
Combinatorial conditions of Krasnosel'skii-type involving concepts ofR-visibility and clearR-visibility are given to ensure that the dimension of theR-kernel of a proper subset ofR d is greater than or equal tok, 0<-k<d.
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The author is with the Department of Mathematics of the University of Notre Dame Indiana, on leave from the Mathematical Institute of the Polish Academy of Sciences.
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Cel, J. Determining dimension of the kernel of a cone. Monatshefte für Mathematik 114, 83–88 (1992). https://doi.org/10.1007/BF01535573
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DOI: https://doi.org/10.1007/BF01535573