Results 181 to 190 of about 3,332 (213)
Some of the next articles are maybe not open access.
Differences of Stević–Sharma operators
Banach Journal of Mathematical Analysis, 2020zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Wang, Shuming, Wang, Maofa, Guo, Xin
openaire +2 more sources
Comment on ‘‘Phase-difference operator’’
Physical Review A, 1995We examine the operator \ensuremath{\Phi}${\mathrm{^}}_{12}$ proposed by Luis and S\'anchez-Soto [Phys. Rev. A 48, 4702 (1993)] as a possible description of the phase difference between two electromagnetic fields. We show that there is a difficulty in directly representing the phase difference between arbitrary fields by this operator, but conclude ...
, Pegg, , Vaccaro
openaire +2 more sources
On difference of two monotone operators
Optimization Letters, 2008zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Muhammad Aslam Noor +3 more
openaire +2 more sources
On Unimodular Matrices of Difference Operators
2018We consider matrices \(L \in \mathrm{Mat} _n(K[\sigma , \sigma ^{-1}])\) of scalar difference operators, where K is a difference field of characteristic 0 with an automorphism \(\sigma \). We discuss approaches to compute the dimension of the space of those solutions of the system of equations \(L(y)=0\) that belong to an adequate extension of K.
Sergei A. Abramov, Denis E. Khmelnov
openaire +1 more source
Operator-Difference Scheme with a Factorized Operator
2015In the study of difference schemes for time-dependent problems of mathematical physics, the general theory of stability (well-posedness) for operator-difference schemes is in common use. At the present time, the exact (matching necessary and sufficient) conditions for stability are obtained for a wide class of two- and three-level difference schemes ...
openaire +2 more sources
Comparing Different Aging Operators
2009Quite different search heuristics make use of the concept of assigning an age to search points and systematically remove search points that are too old from the search process. In evolutionary computation one defines some finite maximal lifespan and assigns age 0 to each new search point. In artificial immune systems static pure aging is used.
Thomas Jansen 0001, Christine Zarges
openaire +1 more source
Green’s formula for difference operators
Theoretical and Mathematical Physics, 2009zbMATH Open Web Interface contents unavailable due to conflicting licenses.
openaire +1 more source
Inverse Linear Difference Operators
Computational Mathematics and Mathematical Physics, 2017zbMATH Open Web Interface contents unavailable due to conflicting licenses.
openaire +1 more source
Peak Detection Using Difference Operators
IEEE Transactions on Pattern Analysis and Machine Intelligence, 1979Complex waveforms may contain peaks and valleys at many different scales, ranging from very local to very global. This correspondence describes an approach to detecting these peaks and valleys by applying simple difference operators at each point to neighborhoods having a wide range of sizes, and making simple comparisons of the outputs of these ...
Jan-Olof Eklundh, Azriel Rosenfeld
openaire +3 more sources
On Generalized Powers of the Difference Operator
Canadian Journal of Mathematics, 1965Sumner (3) discussed for arbitrary real λ and h, where the averaging operator ∇h is defined by(1.1)when f(z) is an entire function of exponential type <2π/|h|. Boas (2) gave an alternative definition of ∇h which gave Sumner's results quickly and showed that his definition is equivalent to that of Sumner.
openaire +2 more sources