Convexities of some functions involving the polygamma functions.
Cao, Jian ; Niu, Da-Wei ; Qi, Feng
Applied Mathematics E-Notes [electronic only], Tome 8 (2008), p. 53-57 / Harvested from The Electronic Library of Mathematics
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Publié le : 2008-01-01
EUDML-ID : urn:eudml:doc:55158 
@article{05497777,
     title = {Convexities of some functions involving the polygamma functions.},
     journal = {Applied Mathematics E-Notes [electronic only]},
     volume = {8},
     year = {2008},
     pages = {53-57},
     zbl = {1157.33301},
     language = {en},
     url = {http://dml.mathdoc.fr/item/05497777}
}

Cao, Jian; Niu, Da-Wei; Qi, Feng. Convexities of some functions involving the polygamma functions.. Applied Mathematics E-Notes [electronic only], Tome 8 (2008) pp. 53-57. http://gdmltest.u-ga.fr/item/05497777/