On positive definiteness of some functions VP Zastavnyi Journal of Multivariate Analysis 73 (1), 55-81, 2000 | 94 | 2000 |
Characterization theorems for some classes of covariance functions associated to vector valued random fields E Porcu, V Zastavnyi Journal of Multivariate Analysis 102 (9), 1293-1301, 2011 | 54 | 2011 |
Positive definite functions depending on the norm VP Zastavnyi Russian Journal of Mathematical Physics 1, 511-522, 1993 | 45 | 1993 |
Characterization theorems for the Gneiting class of space–time covariances VP Zastavnyi, E Porcu | 41 | 2011 |
On some properties of Buhmann functions. V Zastavnyi Ukrainian Mathematical Journal 58 (8), 2006 | 29 | 2006 |
Positive-definite splines of special form VP Zastavnyi, RM Trigub Sbornik: Mathematics 193 (12), 1771, 2002 | 28 | 2002 |
Radial positive definite functions and spectral theory of the Schrödinger operators with point interactions N Goloshchapova, M Malamud, V Zastavnyi Mathematische Nachrichten 285 (14‐15), 1839-1859, 2012 | 19 | 2012 |
Buhmann covariance functions, their compact supports, and their smoothness E Porcu, P Zastavyi, M Bevilacqua arXiv preprint arXiv:1606.09527, 2016 | 17 | 2016 |
Positive definite functions and spectral properties of the Schrödinger operator with point interactions NI Goloshchapova, VP Zastavnyi, MM Malamud Mathematical notes 90, 149-154, 2011 | 14 | 2011 |
Exact estimation of an approximation of some classes of differentiable functions by convolution operators VP Zastavnyi Journal of Mathematical Sciences 175 (2), 192-210, 2011 | 14 | 2011 |
On positive definiteness of some radial functions VP Zastavnyi, E Porcu Lobachevskii Journal of Mathematics 38, 386-394, 2017 | 13 | 2017 |
Positive definite radial functions and splines VP Zastavnyi Doklady Mathematics 66 (2), 213-216, 2002 | 13 | 2002 |
Generalized Askey functions and their walks through dimensions E Porcu, V Zastavnyi Expositiones Mathematicae 32 (2), 190-198, 2014 | 11 | 2014 |
Positive definiteness of piecewise-linear function A Manov, V Zastavnyi Expositiones Mathematicae 35 (3), 357-361, 2017 | 10 | 2017 |
Problems related to positive definite functions VP Zastavnyi Positive Definite Functions: From Schoenberg to Space–Time Challenges, 2008 | 9 | 2008 |
Positive-definite functions that depend on a norm VP Zastavnyi Doklady Akademii Nauk 325 (5), 901-903, 1992 | 8 | 1992 |
Concerning a set of zeroes for Fourier transform of a measure and summability of double Fourier series by Bernstein-Rogosinski type methods, Ukrain VP Zastavnyi M. Zh 36, 615-621, 1984 | 8 | 1984 |
On the positive definiteness of some functions related to the Schoenberg problem VP Zastavnyi, AD Manov Mathematical Notes 102, 325-337, 2017 | 7 | 2017 |
Positive-definite functions depending on the norm. Solution of the Schoenberg problem VP Zastavnyi Preprint 9, 1991 | 7 | 1991 |
Positive definite functions and sharp inequalities for periodic functions VP Zastavnyi Ural Mathematical Journal 3 (2), 82-99, 2017 | 6 | 2017 |