Results 41 to 50 of about 5,076,999 (331)

On some regular and singular problems of Birkhoff interpolation

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 1994
Here we investigate the pure (0,1,…,r−2,r)-interpolation problem on the zeros of (1−x2)Pn(α)(x)=(1−x2)Pn(α,α)(x), α>−1, where Pn(α,α)(x) is the Jacobi polynomial of degree n with β=α.
N. Jhunjhunwala, J. Prasad
doaj   +1 more source

On two Laplacian matrices for skew gain graphs

open access: yesElectronic Journal of Graph Theory and Applications, 2021
Gain graphs are graphs where the edges are given some orientation and labeled with the elements (called gains) from a group so that gains are inverted when we reverse the direction of the edges.
Roshni T. Roy   +2 more
doaj   +1 more source

The Incidence and Clinical Relevance of Graft Hypertrophy After Matrix-Based Autologous Chondrocyte Implantation [PDF]

open access: yes, 2011
Background: Graft hypertrophy is the most common complication of periosteal autologous chondrocyte implantation (p-ACI). Purpose: The aim of this prospective study was to analyze the development, the incidence rate, and the persistence of graft ...
Matthias F. Pietschmann   +13 more
core   +1 more source

A point–plane incidence theorem in matrix rings

open access: yesDiscrete Applied Mathematics, 2022
In this paper, we study a point-hyper plane incidence theorem in matrix rings, which generalizes all previous works in literature of this direction.
The Nguyen, Le Anh Vinh
openaire   +2 more sources

The (16,16,2) designs

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 1979
Elementary techniques of algebraic coding theory are here used to discuss the three biplanes with k=6. These three designs are intimately related to the (16,11) extended binary Hamming code and to one another; we systematically investigate these ...
E. F. Assmus, Jr, Chester J. Salwach
doaj   +1 more source

Of the matrics of the equilibrium of the rod formation system based on the principle the duality of the problems of structures mechanics [PDF]

open access: yesMATEC Web of Conferences, 2019
The formation of the equilibrium matrix of the core system in the matrix form is based on the use of the mechanical model of the system obtained by its discretization.
Monakhov Vladimir
doaj   +1 more source

Design of Incidence Matrices With Limited Constellation Expansion in Massive Connectivity NOMA Systems

open access: yesIEEE Access, 2023
Non-orthogonal multiple-access (NOMA) is designed to transmit massive amounts of user communications. The incidence matrix manages the relationship between users and resources. This study focused on increasing user supportability and complexity reduction
Eli Hwang, Xing Hao, Guillermo E. Atkin
doaj   +1 more source

Construction of Structured Random Measurement Matrices in Semi-Tensor Product Compressed Sensing Based on Combinatorial Designs

open access: yesSensors, 2022
A random matrix needs large storage space and is difficult to be implemented in hardware, and a deterministic matrix has large reconstruction error. Aiming at these shortcomings, the objective of this paper is to find an effective method to balance these
Junying Liang   +3 more
doaj   +1 more source

The Moore-Penrose inverse of the incidence matrix of complete multipartite and bi-block graphs

open access: yesDiscrete Mathematics, 2019
A bi-block graph is a connected graph all of whose blocks are complete bipartite graphs. We give a combinatorial interpretation of the Moore–Penrose inverse of the incidence matrix of a complete multipartite graph and a bi-block graph.
A. Azimi, R. Bapat
semanticscholar   +1 more source

Diagonal Forms, Linear Algebraic Methods and Ramsey-Type Problems [PDF]

open access: yes, 2013
This thesis focuses mainly on linear algebraic aspects of combinatorics. Let N_t(H) be an incidence matrix with edges versus all subhypergraphs of a complete hypergraph that are isomorphic to H. Richard M.
Wong, Wing Hong Tony
core   +1 more source

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