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Publications de l'Institut MathématiquePublisher: Matematički institut SANU, BeogradISSN: 0350-1302Issue: (N.S.) 81 (95)Date: 2007Journal Homepage Editorial BoardImpressum   Preface 1 - 1 Siniša Crvenković   Second cohomology and nilpotency class 2 3 - 10 Siniša Crvenković and Vladimir Tasić   AbstractKeywords: nilpotent groups; Lie algebras; cohomology; projective varietiesMSC: 20J06; 57T10 20F18; 57M05DOI: 10.2298/PIM0795003CZbl: 1186.20034 Eigenvalue Bounds for the Signless Laplacian 11 - 27 Dragoš Cvetković, Peter Rowlinson and Slobodan Simić   AbstractKeywords: graph theory, graph spectra, line graph, signless LaplacianMSC: 05C50DOI: 10.2298/PIM0795011CZbl: 1164.05038 An Attempt at Frankl's Conjecture 29 - 43 Petar Marković   AbstractKeywords: Frankl's conjecture, union-closed sets conjectureMSC: 05D05 05A05; 04A20DOI: 10.2298/PIM0795029MZbl: 1246.05004 Sums of Like Powers and some Dense Sets 45 - 52 Žarko Mijajlović, Miloš Milošević and Aleksandar Perović   AbstractMSC: 11D41 11B05; 11B75; 11Y50DOI: 10.2298/PIM0795045MZbl: 1224.11041 Quadratic Level Quasigroup Equations With Four Variables I 53 - 67 Aleksandar Krapež   AbstractKeywords: Functional equation, quadratic equation, level equation, Belousov equation, balanced equation, gemini equation, medial equation, general solution, quasigroup, isotopy, quasigroup (left, right) linear over a group, $T$-quasigroup, varietyMSC: 39B52 20N05DOI: 10.2298/PIM0795053KZbl: 1229.39035 Analytic Equivalence of Plane Curve Singularities y^{n}+x^{alpha}y+x^{beta}a(x)=0 69 - 78 A. Lipkovski and V. Stepanović   AbstractMSC: 14B05 14H20 32S15DOI: 10.2298/PIM0795069SZbl: 1222.14006 On the Eigenvalues of some Class of Pseudo-linear Transformations 79 - 83 Milica Anđelić   AbstractKeywords: skew polynomials; pseudo-linear transformationsMSC: 15A24 15A04; 15A18; 16S36 Extendable Shelling, Simplicial and Toric h-vector of Some Polytopes 85 - 93 Duško Jojić   AbstractKeywords: extendable shellability; hypersimplex; toric $h$-vectorMSC: 52B22 52B05DOI: 10.2298/PIM0795085JZbl: 1164.52009 On Regular Anti-congruence in Anti-ordered Semigroups 95 - 102 Daniel Romano   AbstractKeywords: Constructive mathematics, semigroup with apartness, anti-ordered semigroup, anti-congruence, regular anti-congruence, quasi-antiorderMSC: 03F65 06F05 20M10DOI: 10.2298/PIM0795095RZbl: 1247.03133 Article page: 12>>

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