13 articles in this issue
Akiyoshi Sannai
In this paper, we consider the invariant subring of the Cox ring by the automorphism group of the projective variety X under some assumption. We prove that the ring is finitely generated if X is a K3 surface.
Mamadou Abdoul Diop, Moustapha Dieye, Hasna Hmoyed, Khalil Ezzinbi
In this work, we study the existence and uniqueness of mild and classical solutions for a nonlinear impulsive partial integrodiifential equation with nonlocal conditions. We need the compactness of the resolvent operator of the integrodifferential equatio... see more
Mohamed Lamine Sahari, A. K. Taha, Louis Randriamihamison
This note provides a complete description of the spectrum of di- agonal perturbation of weighted shift operator acting on a separable Hilbert space.
Abdollah Alhevaz, Maryam Baghipur, ?Harishchandra Ramane
?In this paper?, ?we study the eigenvalues of the reciprocal distance signless Laplacian matrix of a connected graph and??obtain some bounds for the maximum??eigenvalue of this matrix?. ?We also focus on bipartite graphs and find some bounds for the spect... see more
Kevin Langlois
We classify the G a -actions on normal affine varieties defined over a field that are hori-zontal with respect to a torus action of complexity one. This generalizes previous versions that wereavailable for perfect ground fields (cf. [7, 12, 11]).
Robert Laterveer
Abdollah Alhevaz, Mahsa Darkooti, Sadegh Rahimi, Hadi Rahbani
Christos Pelekis
Gadhi Abderrazzak Nazih, Khadija Hamdaoui, Mohammed El Idrissi, Fatimazahra Rahou
In this note, we are concerned with a multiobjective optimization problem. Using a special (nonlinear) scalarization [1], together with an exact separation principle recently introduced by Zheng,Yang and Zou [11], we give necessary optimality conditi... see more
Abdollah Alhevaz, Ebrahim Hashemi, Khadijeh Khalilnezhad
Shariefuddin Pirzada, Hilal A. Ganie, Uma Tul Samee
Roza Aceska, Alessandro Arsie, Ramesh Karki
Shapour Heidarkhani, John R. Graef, Lingju Kong, Amjad Salari
Sufficient conditions are established to guarantee the existence of at leastthree weak solutions to a degenerate quasilinear elliptic systemwith three parameters and Dirichlet boundary conditions. An application ofthe main theorem to a scalar elliptic pro... see more