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A note on matrix‐convexity
Author(s) -
Rizvi M. Haseeb,
Shorrock R. W.
Publication year - 1979
Publication title -
canadian journal of statistics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.804
H-Index - 51
eISSN - 1708-945X
pISSN - 0319-5724
DOI - 10.2307/3315013
Subject(s) - convexity , mathematics , matrix (chemical analysis) , function (biology) , convex function , regular polygon , operator (biology) , pure mathematics , combinatorics , materials science , geometry , economics , chemistry , biology , composite material , financial economics , biochemistry , repressor , evolutionary biology , gene , transcription factor
The function Ψ(X) = X α is not operator‐convex when α ∉ [–1, 2].