Browsing Facultatea de Matematică şi Informatică by Title

Browsing Facultatea de Matematică şi Informatică by Title

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  • O PROBLEMA DESPRE CENTRUL PROBABILIST AL ARBORELUI 
    Poștaru, Andrei; Moftuleac, Daniela (CEP USM, 2008)
    In this paper we consider the weighted minimax (1-center) location problem on the tree with uniform distributed weights. The set of the T-centres and one algorithm of a Önding of the center of a tree with constant wieghteds ...
  • ON A GENERALIZATION OF THE INNER MAPPING GROUP 
    Syrbu, Parascovia (CEP USM, 2017)
    We consider the group GM(Q,·), generated by all left, rightand middle translations of a loop (Q,·). The generalized innermapping groupJ consists of all mappingsα∈GM(Q,·), such that α(e) =e, wheree is the unit of (Q,·). In ...
  • ON ASYMPTOTIC REPRESENTATION OF SINGULAR SOLUTIONS OF THE MODEL ELLIPTIC EQUATION NEAR BOUNDARY AND FORMULATION OF SINGULAR BOUNDARY CONDITIONS 
    Jitarașu, Nicolae (Academy of Sciences of Moldova, 2012)
    In the work the asymptotic representation of singular solut ion of the elliptic model Sobolev problem near components of arbitrar y dimensions of boundary is specified. Using this asymptotical representation of ...
  • ON COMPACT VIABLE SETS IN AFFNE IFS WITH COHERENT HYPERBOLIC STRUCTURE 
    Glavan, Vasile; Guțu, Valeriu (Valines SRL, 2014)
    Viable sets in multi-valued dynamics, generated by finite families of mappings, are considered. In the case of affine Iterated Function Systems with coherent hyperbolic structure the existence of compact viable sets is ...
  • ON INTELLIGENT SOFTWARE TOOLS IN SOLVING OF INTEGRAL EQUATIONS OF SECOND KIND 
    Carmocanu, Gheorghe; Căpăţână, Gheorghe; Seiciuc, Eleonora; Seiciuc, Vladislav (2015)
    The Intelligent Support System for approximate solving of the Fredholm and Volterra integral equations of the second kind are developed. Some components for Computing Modules of the Intelligent Support System for solving ...
  • ON INVARIANCE OF RECURSIVE DIFFERENTIABILITY UNDER TH E ISOTOPY OF LEFT BOL LOOPS 
    Larionova-Cojocaru, Inga; Syrbu, Parascovia (CEP USM, 2007)
    We prove that the recursive derivatives of order 1 of isotopic left Bol loops are isotopic and that every loop, isotopic to a recursively 1-differentiable left Bol loop, is recursively 1-differentiable.The recursive ...
  • ON ISOHEDRAL TILINGS BY 12-GONS FOR HYPERBOLIC GROUP OF GENUS TWO 
    Zamorzaeva, Elizaveta (Valines SRL, 2014)
    For hyperbolic translation group of genus 2 isohedral tilings of the hyperbolic plane with 12-gons are obtained.
  • ON ISOHEDRAL TILINGS BY 12-GONS FOR HYPERBOLIC GROUP OF GENUS TWO. 
    Zamorzaeva, Elizaveta (CEP USM, 2017)
    The paper studies isohedral tilings of the hyperbolic plane for the group of translations of genus 2 by 14-gons. It is shown how to enumerate all eligible cycles of valencies for polygon with large number of vertices.
  • ON MULTIPLICATION GROUPS OF ISOSTROPHIC QUASIGROUPS. 
    Grecu, Ion (Valines SRL, 2014)
    Relations between the multiplication groups of loops which are isostrophes of quasigroups are studied in the present work. We prove that, if (Q; ¢) is a quasigroup and its isostrophe (Q; ±), where x ± y = Ã(y) n '(x), ...
  • ON MULTIPLICATION OF ISOSTROPHIC QUASIGROUPS 
    Grecu, Ion (CEP USM, 2014)
    A loop is called a middle Bol loop if every loop isotope of satisfies the identity(i.e. if the anti- autmorphic inverse property is universal in ). Middle Bol loops are isostrophes of left (right) Bol loops. Multiplication ...
  • ON NONTRIVIAL COVERS AND PARTITIONS OF GRAPHS BY CONVEX SETS 
    Buzatu, Radu; Cataranciuc, Sergiu (Institutul de Matematică şi Informatică al Academiei de Ştiinţe a Moldovei, 2018)
    In this paper we prove that it is NP-complete to decide whet- her a graph can be partitioned into nontrivial convex sets. We show that it can be verified in polynomial time whether a graph can be covered by nontrivial ...
  • ON NUMERICAL ALGORITHMS FOR SOLVING MULTIDIMENSIONAL ANALOGS OF THE KENDALL FUNCTIONAL EQUATION 
    Mishkoy, Gheorghe; Bendersch, Olga; Giordano, Silvia; Bejan, Andrei Iu. (Institutul de Matematică şi Informatică al AŞM, 2008)
    The numerical algorithms for solution of multidimensionalanalogs of theKendall (Kendall-Takacs) equation, including effective fast algorithm are discussed.
  • ON ORTHOGONAL SYSTEMS OF TERNARY QUASIGROUPS ADMITTING NONTRIVIAL PARATOPIES. 
    Syrbu, Parascovia; Ceban, Dina (Institutul de Matematică şi Informatică al AŞM, 2017)
    In the present workwe describ eallorthogonal systems consisting of three ternary quasigroupop erations and of all (three) ternary selectors,admitting at least one nontrivial paratopy. In[11]we proved that there exist ...
  • ON PARATOPIES OF ORTHOGONAL SYSTEMS OF TERNARY QUASIGROUPS. I 
    Syrbu, P.; Ceban, D. (Academy of Sciences of Moldova, 2016)
    A paratopy of an orthogonal system = {A1,A2, . . . ,An} of n-ary quasigroups, defined on a nonempty set Q, is a mapping : Qn 7→ Qn such that = , where = {A1 ,A2 , . . . ,An }. The paratopies of the orthogonal ...
  • ON PSEUDOAUTOMORPHISMS OF MIDDLE BOL LOOPS 
    Grecu, Ion (CEP USM, 2015)
    A loop (Q1▪) is called a middle Bol loop if every loop isotope of (Q1▪) satisfies the identity (x∙y)-1 = y -1 x -1 (i.e. if the anti-automorphic inverse property is universal in (Q1▪) [1]. Middle Bol loops are isostrophes ...
  • ON QUASIGROUPS WITH SOME MINIMAL IDENTITIES 
    Ceban, Dina; Syrbu, Parascovia (CEP USM, 2015)
    Quasigroups with two identities (of typesT1 and T2) from Belousov-Bennett classification are considered. It is proved that a π-quasigroup of type T2 is also of type only if it satisfies the identity yx∙x=y (the “right keys ...
  • ON RECURSIVE DIFFERENTIABILITY OF BINARY QUASIGROUPS 
    Larionova-Cojocaru, Inga; Syrbu, Parascovia ("VALINEX", 2014)
    A quasigroup is called recursively n-differentiable if its first n recursive derivatives are quasigroups. The class of recursively differential quasigroups is arisen in the theory of MDS codes, in early 2000. Connections ...
  • ON RECURSIVE DIFFERENTIABILITY OF BINARY QUASIGROUPS 
    Larionova-Cojocaru, Inga; Syrbu, Parascovia (CEP USM, 2015)
    Recursively differentiable binary quasigroups and loops, are considered in the present paper. Invariants under the recursive differentiability of binary quasigroups are found. It is shown that the recursive derivative of ...
  • ON RECURSIVELY DIFFERENTIABLE K-QUASIGROUPS 
    Syrbu, Parascovia; Cuznețov, Elena (2022)
    Recursive differentiability of linear k-quasigroups (k ≥ 2) is studied in the present work. A k-quasigroup is recursively r-differentiable (r is a natu- ral number) if its recursive derivatives of order up to r are ...
  • ON SOME IDENTITIES IN TERNARY QUASIGROUPS 
    Ceban, Dina (CEP USM, 2016)
    Identities of length 5, with two variables in binary quasigroups are called minimal identities. V.Belousov and, independently, F. Bennett showed that, up to the parastrophic equivalence, there are seven minimal identities. ...

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