Results 71 to 80 of about 4,457 (265)

Enumeration of vacuously transitive relations

Discrete Mathematics, 1973
AbstractThe concept of vacuously transitive relation is defined and under an appropriate isomorphism, the equivalence classes of such relations are enumerated by use of the power group enumeration theorem [3]. This enumeration is shown to be combinatorially equivalent to a counting series derived by Harary and Prins [4] for certain kinds of bicolored ...
openaire   +2 more sources

Reachability relations, transitive digraphs and groups

Ars Mathematica Contemporanea, 2014
In A. Malnic, D. Marusic, N. Seifter, P. Sparl and B. Zgrablic, Reachability relations in digraphs, Europ. J. Combin. 29  (2008), 1566–1581, it was shown that properties of digraphs such as growth, property Z , and number of ends are reflected by the properties of certain reachability relations defined on the vertices of the corresponding digraphs.
Aleksander Malnic, Primoz Potocnik, Norbert Seifter, Primoz Sparl   +3 more
openaire   +4 more sources

Kuga–Satake Construction on Families of K3 Surfaces of Picard Rank 14

Mathematische Nachrichten, EarlyView.
ABSTRACT The isometry between the type IV6 and the type II4 hermitian symmetric domains suggests a possible relation between suitable moduli spaces of K3 surfaces of Picard rank 14 and of polarized abelian 8‐folds with totally definite quaternion multiplication. We show how this isometry induces a geometrically meaningful map between such moduli spaces
Flora Poon
wiley   +1 more source

Allocation of Indivisible Items With a Common Preference Graph: Minimizing Total Dissatisfaction

Networks, EarlyView.
ABSTRACT Allocating indivisible items among a set of agents is a frequently studied discrete optimization problem. In the setting considered in this work, the agents' preferences over the items are assumed to be identical. We consider a very recent measure for the overall quality of an allocation which does not rely on numerical valuations of the items.
Nina Chiarelli, Clément Dallard, Andreas Darmann, Stefan Lendl, Martin Milanič, Peter Muršič, Ulrich Pferschy   +6 more
wiley   +1 more source

The Chaotic Properties of Increasing Gap Shifts

International Journal of Mathematics and Mathematical Sciences, 2019
It is well known that locally everywhere onto, totally transitive, and topologically mixing are equivalent on shift of finite type. It turns out that this relation does not hold true on shift of infinite type.
Nor Syahmina Kamarudin, Malouh Baloush, Syahida Che Dzul-Kifli   +2 more
doaj   +1 more source

Exploratory Analysis of Sustainable Consumption and Production Factors in Services: Insights From Four Case Studies Using Interpretive Structural Modeling

Sustainable Development, EarlyView.
ABSTRACT This study investigates how 14 sustainable consumption and production (SCP) factors interact across four service categories—Mass Service, Professional Service, Service Factory, and Service Shop—using interpretive structural modeling (ISM). ISM enables the identification and hierarchical classification of interdependencies among SCP factors in ...
Amanda Duarte Feitosa, Fagner José Coutinho de Melo, André Philippi Gonzaga de Albuquerque, Naia Antunis de Rezende, Denise Dumke de Medeiros   +4 more
wiley   +1 more source

Constructibility in the Simpson Set Theory Without the Local Countability Axiom

Mathematics
Following some ideas and constructions of Simpson, we introduce a set theory whichextends the Zermelo theory taken without the Power Set axiom by the three axioms postulating that, (1) for any set, there exists a set containing all finite subsets of the ...
Vladimir Kanovei, Vassily Lyubetsky
doaj   +1 more source

Extending Structured Dialogic Design With Multi‐Criteria Evaluation: Toward Sustainable Multi‐Species Governance

Systems Research and Behavioral Science, EarlyView.
ABSTRACT This paper presents an innovative integration of structured democratic dialogue with a multi‐criteria evaluation step designed to strengthen participatory decision‐making for complex socio‐ecological challenges. Conducted virtually with Communities of Practice focused on multi‐species governance, the process combined systemic mapping of ...
Yiannis Laouris, Marcus Hallside, Janet McIntyre‐Mills, Patricia Lethole, Mphatheleni Makaulule, Vhonani Netshandama, Lisman Manurung, Ida Widianingsih, Riswanda Riswanda   +8 more
wiley   +1 more source

Tuples of Operators with Hereditarily Transitivity Property

Journal of Mathematical Extension, 2013
In this paper, we investigate the relation between hypercyclicity and d-dense orbits of a tuple of operators.
B. Yousefi∗, K. Jahedi
doaj  

Transitivity of the εm-relation on (m-idempotent) hyperrings

Open Mathematics, 2018
On a general hyperring, there is a fundamental relation, denoted γ*, such that the quotient set is a classical ring. In a previous paper, the authors defined the relation εm on general hyperrings, proving that its transitive closure εm∗$\begin{array}{} \
Norouzi Morteza, Cristea Irina
doaj   +1 more source