Results 271 to 280 of about 4,272 (299)
Some of the next articles are maybe not open access.
Positive Definite Functions and States
The Annals of Mathematics, 1954This paper is concerned with the relation between the set P of continuous, positive definite functions on a locally compact group G and the set F of continuous, positive linear functionals on the group operator algebra A of G. This concern is motivated by an attempt to establish a connection between the procedure of Gelfand and Raikov [3] with the ...
openaire +2 more sources
On positive definite quadratic forms
Forum Mathematicum, 2000Let \(Q\) be a real indefinite quadratic form in 3 or more variables whose coefficients are not all in rational ratio. It was proved by Margulis (1987) that \(Q\) assumes arbitrarily small values at integral points. In this paper a natural analogue of Margulis result has been investigated.
openaire +1 more source
Positive definiteness and the Stolarsky invariance principle
Journal of Mathematical Analysis and Applications, 2022Ryan Matzke +2 more
exaly
On Positive-Definite Functions
Proceedings of the London Mathematical Society, 1956openaire +1 more source
Positive definiteness for 4th order symmetric tensors and applications
Analysis and Mathematical Physics, 2020Song Y S
exaly
Positive Definiteness and Stability of Interval Matrices
SIAM Journal on Matrix Analysis and Applications, 1994Jiří Rohn
exaly
Positive definiteness of Diffusion Kurtosis Imaging
Inverse Problems and Imaging, 2012Liqun Qi +2 more
exaly