Results 51 to 60 of about 971 (113)

Learning Bayesian networks based on bi-velocity discrete particle swarm optimization with mutation operator

open access: yesOpen Mathematics, 2018
The problem of structures learning in Bayesian networks is to discover a directed acyclic graph that in some sense is the best representation of the given database. Score-based learning algorithm is one of the important structure learning methods used to
Wang Jingyun, Liu Sanyang
doaj   +1 more source

Interval-Valued Fuzzy Soft Graphs

open access: yesTopological Algebra and its Applications, 2017
In this paper, we combine concepts of interval-valued fuzzy soft sets and graph theory. Then we introduce notations of interval-valued fuzzy soft graphs and complete interval-valued fuzzy soft graphs.
Zihni Onur   +2 more
doaj   +1 more source

Annular and pants thrackles [PDF]

open access: yesDiscrete Mathematics & Theoretical Computer Science, 2018
A thrackle is a drawing of a graph in which each pair of edges meets precisely once. Conway's Thrackle Conjecture asserts that a thrackle drawing of a graph on the plane cannot have more edges than vertices.
Grace Misereh, Yuri Nikolayevsky
doaj   +1 more source

Unique perfect matchings, forbidden transitions and proof nets for linear logic with Mix [PDF]

open access: yesLogical Methods in Computer Science, 2020
This paper establishes a bridge between linear logic and mainstream graph theory, building on previous work by Retor\'e (2003). We show that the problem of correctness for MLL+Mix proof nets is equivalent to the problem of uniqueness of a perfect ...
Lê Thành Dũng Nguyên
doaj   +1 more source

Evasive Properties of Sparse Graphs and Some Linear Equations in Primes

open access: yes, 2013
We give an unconditional version of a conditional, on the Extended Riemann Hypothesis, result of L. Babai, A. Banerjee, R. Kulkarni and V. Naik (2010) on the evasiveness of sparse graphs.Comment: This version corrects a mistake made in the previous ...
Shparlinski, Igor
core   +1 more source

On dynamic network security: A random decentering algorithm on graphs

open access: yesOpen Mathematics, 2018
Random Decentering Algorithm (RDA) on a undirected unweighted graph is defined and tested over several concrete scale-free networks. RDA introduces ancillary nodes to the given network following basic principles of minimal cost, density preservation ...
Trobajo M.T.   +2 more
doaj   +1 more source

Mixing Times of Markov Chains on Degree Constrained Orientations of Planar Graphs [PDF]

open access: yesDiscrete Mathematics & Theoretical Computer Science, 2017
We study Markov chains for $\alpha$-orientations of plane graphs, these are orientations where the outdegree of each vertex is prescribed by the value of a given function $\alpha$.
Stefan Felsner, Daniel Heldt
doaj   +1 more source

Lower and upper bounds of shortest paths in reachability graphs

open access: yesInternational Journal of Mathematics and Mathematical Sciences, Volume 2004, Issue 57, Page 3023-3036, 2004., 2004
We prove the following property for safe marked graphs, safe conflict‐free Petri nets, and live and safe extended free‐choice Petri nets. We prove the following three results. If the Petri net is a marked graph, then the length of the shortest path is at most (|T| − 1) · |T|/2.
P. K. Mishra
wiley   +1 more source

Super edge-connectivity and matching preclusion of data center networks [PDF]

open access: yesDiscrete Mathematics & Theoretical Computer Science, 2019
Edge-connectivity is a classic measure for reliability of a network in the presence of edge failures. $k$-restricted edge-connectivity is one of the refined indicators for fault tolerance of large networks.
Huazhong Lü, Tingzeng Wu
doaj   +1 more source

On the smallest snarks with oddness 4 and connectivity 2 [PDF]

open access: yes, 2018
A snark is a bridgeless cubic graph which is not 3-edge-colourable. The oddness of a bridgeless cubic graph is the minimum number of odd components in any 2-factor of the graph. Lukot'ka, M\'acajov\'a, Maz\'ak and \v{S}koviera showed in [Electron.
Goedgebeur, Jan
core   +2 more sources

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