Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
4591697 | Journal of Functional Analysis | 2008 | 25 Pages |
Abstract
For a (point-wisely non-negative) positive definite function a certain criterion for its infinite divisibility (i.e., all its fractional powers are also positive definite) is obtained. This criterion enables us to show infinite divisibility for many positive definite functions appearing naturally in study of operator means. In particular, we determine when the functioncosh(νx)+s′coshx+s(ν∈[0,1];s,s′∈(−1,1]) is infinitely divisible.
Related Topics
Physical Sciences and Engineering
Mathematics
Algebra and Number Theory
Authors
Hideki Kosaki,