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This book includes 15 articles published in the Special Issue "Theoretical Computer Science and Discrete Mathematics" of Symmetry (ISSN 2073-8994). This Special Issue is devoted to original and significant contributions to theoretical computer science and discrete mathematics. The aim was to bring together research papers linking different areas of discrete mathematics and theoretical computer science, as well as applications of discrete mathematics to other areas of science and technology. The Special Issue covers topics in discrete mathematics including (but not limited to) graph theory, cryptography, numerical semigroups, discrete optimization, algorithms, and complexity.

Research & information: general --- Mathematics & science --- fuzzy set --- n-Pythagorean --- n-PFS algebra --- triangular norms --- outer-independent Roman domination --- Roman domination --- vertex cover --- rooted product graph --- total domination --- domination --- secure domination --- secure Italian domination --- weak roman domination --- w-domination --- cryptanalysis --- group key establishment --- topology optimization --- optimization --- filtering --- method --- penalization --- weight factor --- FEM --- MATLAB --- SIMP --- estimated prime factor --- integer factorisation problem --- continued fraction --- Fermat's Factoring Algorithm --- genetic algorithm --- AES(t) --- heuristics --- microaggregation --- statistical disclosure control --- graph theory --- traveling salesman problem --- data privacy --- location privacy --- differentials in graphs --- strong differential --- quasi-total strong differential --- quasi-total Italian domination number --- numerical semigroup --- forest --- ordinarization transform --- quasi-ordinarization transform --- load redistribution --- leveling power consumption per phase --- three-phase asymmetric distribution networks --- ideal power consumption --- mixed-integer convex optimization --- strongly total Roman domination --- total Roman domination --- lexicographic product graph --- improved crow search algorithm --- normal Gaussian distribution --- phase swapping problem --- power losses --- asymmetric distribution grids --- vortex search algorithm --- nonidentical parallel production lines --- axle housing machining --- mixed model production --- eligibility constraint --- fuzzy due date --- grey wolf optimizer --- fuzzy set --- n-Pythagorean --- n-PFS algebra --- triangular norms --- outer-independent Roman domination --- Roman domination --- vertex cover --- rooted product graph --- total domination --- domination --- secure domination --- secure Italian domination --- weak roman domination --- w-domination --- cryptanalysis --- group key establishment --- topology optimization --- optimization --- filtering --- method --- penalization --- weight factor --- FEM --- MATLAB --- SIMP --- estimated prime factor --- integer factorisation problem --- continued fraction --- Fermat's Factoring Algorithm --- genetic algorithm --- AES(t) --- heuristics --- microaggregation --- statistical disclosure control --- graph theory --- traveling salesman problem --- data privacy --- location privacy --- differentials in graphs --- strong differential --- quasi-total strong differential --- quasi-total Italian domination number --- numerical semigroup --- forest --- ordinarization transform --- quasi-ordinarization transform --- load redistribution --- leveling power consumption per phase --- three-phase asymmetric distribution networks --- ideal power consumption --- mixed-integer convex optimization --- strongly total Roman domination --- total Roman domination --- lexicographic product graph --- improved crow search algorithm --- normal Gaussian distribution --- phase swapping problem --- power losses --- asymmetric distribution grids --- vortex search algorithm --- nonidentical parallel production lines --- axle housing machining --- mixed model production --- eligibility constraint --- fuzzy due date --- grey wolf optimizer

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This book includes 15 articles published in the Special Issue "Theoretical Computer Science and Discrete Mathematics" of Symmetry (ISSN 2073-8994). This Special Issue is devoted to original and significant contributions to theoretical computer science and discrete mathematics. The aim was to bring together research papers linking different areas of discrete mathematics and theoretical computer science, as well as applications of discrete mathematics to other areas of science and technology. The Special Issue covers topics in discrete mathematics including (but not limited to) graph theory, cryptography, numerical semigroups, discrete optimization, algorithms, and complexity.

fuzzy set --- n-Pythagorean --- n-PFS algebra --- triangular norms --- outer-independent Roman domination --- Roman domination --- vertex cover --- rooted product graph --- total domination --- domination --- secure domination --- secure Italian domination --- weak roman domination --- w-domination --- cryptanalysis --- group key establishment --- topology optimization --- optimization --- filtering --- method --- penalization --- weight factor --- FEM --- MATLAB --- SIMP --- estimated prime factor --- integer factorisation problem --- continued fraction --- Fermat’s Factoring Algorithm --- genetic algorithm --- AES(t) --- heuristics --- microaggregation --- statistical disclosure control --- graph theory --- traveling salesman problem --- data privacy --- location privacy --- differentials in graphs --- strong differential --- quasi-total strong differential --- quasi-total Italian domination number --- numerical semigroup --- forest --- ordinarization transform --- quasi-ordinarization transform --- load redistribution --- leveling power consumption per phase --- three-phase asymmetric distribution networks --- ideal power consumption --- mixed-integer convex optimization --- strongly total Roman domination --- total Roman domination --- lexicographic product graph --- improved crow search algorithm --- normal Gaussian distribution --- phase swapping problem --- power losses --- asymmetric distribution grids --- vortex search algorithm --- nonidentical parallel production lines --- axle housing machining --- mixed model production --- eligibility constraint --- fuzzy due date --- grey wolf optimizer --- n/a --- Fermat's Factoring Algorithm

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This book, Applications of Operational Research and Mathematical Models in Management, includes all the papers published in the Mathematics Special Issue with the same title. All the published papers are of high quality and were subjected to rigorous peer review. Mathematics is included in the Science Citation Index (Web of Science), and its current Impact Factor is 1.747. The papers in this book deal with on R&D performance models, methods for ranking the perspectives and indicators of a balance scorecard, robust optimization model applications, integrated production and distribution problem solving, demand functions, supply chain games, probabilistic optimization and profit research, coordinated techniques for order preference, robustness approaches in bank capital optimization, and hybrid methods for tourism demand forecasting. All the papers included contribute to the development of research.

Research & information: general --- Mathematics & science --- tourism management --- hybrid method --- fruit fly optimization algorithm --- neural network --- web search data --- forecast of daily tourism demand --- optimization method --- robust optimization --- capital to risk asset ratio --- chance constraint --- safety-first principle --- Basel III --- capital requirements --- TOPSIS --- coordinated TOPSIS --- decision-making --- assessment --- coefficient of variation --- information entropy --- probabilistic analysis --- optimization --- Lagrange equations --- operations research --- bomb fragmentation --- digital supply chain --- smart contracts --- dynamic inventory --- revenue sharing contract --- dual-channel --- two sales periods --- channel structure strategy --- strategic consumers --- Nash game --- integrated --- production scheduling --- distribution --- large neighborhood search algorithm --- duality theory --- uncertain set --- logistics production --- inventory process --- balanced scorecard --- Bradley-Terry --- performance evaluation --- software factory --- multiple-criteria decision-making --- AHP --- value relevance --- book value --- abnormal earnings --- R &amp --- D --- panel data --- tourism management --- hybrid method --- fruit fly optimization algorithm --- neural network --- web search data --- forecast of daily tourism demand --- optimization method --- robust optimization --- capital to risk asset ratio --- chance constraint --- safety-first principle --- Basel III --- capital requirements --- TOPSIS --- coordinated TOPSIS --- decision-making --- assessment --- coefficient of variation --- information entropy --- probabilistic analysis --- optimization --- Lagrange equations --- operations research --- bomb fragmentation --- digital supply chain --- smart contracts --- dynamic inventory --- revenue sharing contract --- dual-channel --- two sales periods --- channel structure strategy --- strategic consumers --- Nash game --- integrated --- production scheduling --- distribution --- large neighborhood search algorithm --- duality theory --- uncertain set --- logistics production --- inventory process --- balanced scorecard --- Bradley-Terry --- performance evaluation --- software factory --- multiple-criteria decision-making --- AHP --- value relevance --- book value --- abnormal earnings --- R &amp --- D --- panel data

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Collectively working robot teams can solve a problem more efficiently than a single robot, while also providing robustness and flexibility to the group. Swarm robotics model is a key component of a cooperative algorithm that controls the behaviors and interactions of all individuals. The robots in the swarm should have some basic functions, such as sensing, communicating, and monitoring, and satisfy the following properties:

n/a --- self-organization --- signal source localization --- multi-robot system --- sensor deployment --- parallel technique --- shape normalization --- genetic algorithm --- multiple robots --- optimization --- improved potential field --- optimal configuration --- autonomous docking --- asymmetrical interaction --- comparison --- behaviors --- patterns --- self-assembly robots --- congestion control --- surface-water environment --- target recognition --- coordinate motion --- UAV swarms --- formation reconfiguration --- swarm robotics --- swarm intelligence --- artificial bee colony algorithm --- obstacle avoidance --- fish swarm optimization --- search algorithm --- robotics --- time-difference-of-arrival (TDOA) --- formation --- mobile robots --- formation control --- meta-heuristic --- event-triggered communication --- search --- virtual structure --- 3D model identification --- surveillance --- event-driven coverage --- scale-invariant feature transform --- system stability --- Swarm intelligence algorithm --- bionic intelligent algorithm --- unmanned aerial vehicle --- underwater environment --- artificial flora (AF) algorithm --- swarm behavior --- weighted implicit shape representation --- Cramer–Rao low bound (CRLB) --- environmental perception --- particle swarm optimization --- modular robots --- cooperative target hunting --- virtual linkage --- multi-AUV --- consensus control --- panoramic view --- nonlinear disturbance observer --- sliding mode controller --- path optimization --- Swarm Chemistry --- multi-agents --- Cramer-Rao low bound (CRLB)

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This Special Issue collects ten articles related to the broadly understood physical properties of intermetallic compounds. Differential thermal analysis was carried out, and the temperatures of thermal effects that arise during the reduction of neodymium from a technological salt mixture of KCl–NaCl–CaCl2–NdF3 with a magnesium–zinc alloy were established. For sol–gel products of stoichiometric MgTiO3, accurate thermal expansion coefficients were measured. The effect of various nanoparticles, such as GaF3, ZnF2, Zn(BF4)2 and Ga2O3 additions, on the activity of CsF-RbF-AlF3 flux and mechanical behavior of Al/Steel brazed joints is presented. The effect of Bi substitution on the structural and magnetic properties of Nd1-xBixMnO3 is investigated. Characteristics of hard magnetic materials based on Nd2Fe14B and Ce2Fe14B intermetallic compounds are presented. A special algorithm is presented to support vector regression for estimating the maximum magnetic entropy change of doped manganite-based compounds. We have received information about the mechanical properties of the reactively synthesized porous Ti3SiC2 compound with different apertures. Furthermore, we have presented the experimental results of Zn-doped Al-rich for fast on-board hydrogen production.

History of engineering & technology --- Ti3SiC2 --- intermetallic compound --- porous material --- mechanical property --- pore size --- elastic modulus --- Al-rich alloy --- hydrogen generation --- Zn addition --- Ga2O3 --- flux --- Zn-Al filler metal --- wettability --- spreadability --- magnetocaloric effect --- support vector regression --- extreme learning machine --- maximum magnetic entropy change --- gravitational search algorithm --- GaF3 --- CsF-AlF3 flux --- R-Fe-B intermetallics --- cerium --- permanent magnets --- simulation --- magnetic anisotropy constant --- hysteresis loop --- coercive force --- residual magnetization --- X-ray diffraction --- perovskites manganites --- AC magnetic susceptibility --- ZnF2 --- Zn(BF4)2 --- mechanical properties --- MgTiO3 --- geikielite --- high-temperature X-ray diffraction --- sol-gel technique --- thermal expansion --- magnesium–zinc–neodymium master alloy --- Mg–Zn–Nd --- magnesium master alloy --- magnesium --- rare-earth metals --- master alloy synthesis --- metallothermic reduction --- n/a --- magnesium-zinc-neodymium master alloy --- Mg-Zn-Nd --- Engineering --- Technology --- History.