kopernickoyck geometric lagkraft inequalitykrawtchouk polynomialkrigingkronecker deltakronecker indexkronecker lemmakronecker productkronecker product of designskronecker product of matriceskronecker setkronmal harter estimatekruskal shepard methodkruskal wallis testkth nearest neighbor samplingkth nearest point samplingkuiper corsten iterationkullback informationkullback liebler informationkurtosis