Publications de l'Institut Mathématique (Beograd)
Vol. 81(95), 2007 · Contents

Sinisa Crvenkovic, Vladimir Tasic:
Second cohomology and nilpotency class 2

Dragos Cvetkovic, Peter Rowlinson and Slobodan Simic:
EIGENVALUE BOUNDS
FOR THE SIGNLESS LAPLACIAN

Petar Markovic:
AN ATTEMPT AT FRANKL'S CONJECTURE

Zarko Mijajlovic, Milos Milosevic and Aleksandar Perovic:
SUMS OF LIKE POWERS AND SOME DENSE SETS

Aleksandar Krapez:
QUADRATIC LEVEL QUASIGROUP EQUATIONS WITH FOUR VARIABLES I

A. Lipkovski, V. Stepanovic:
ANALYTIC EQUIVALENCE OF PLANE CURVE SINGULARITIES $y^{n}+x^{\alpha}y+x^{\beta}A(x)=0$

Milica An\dj elic:
ON THE EIGENVALUES OF SOME CLASS OF PSEUDO-LINEAR TRANSFORMATIONS

Dusko Jojic:
EXTENDABLE SHELLING, SIMPLICIAL AND TORIC $h$-VECTOR OF SOME POLYTOPES

Daniel Abraham Romano:
ON REGULAR ANTI-CONGRUENCE IN ANTI-ORDERED SEMIGROUPS

Biljana Janeva, Snezana Ilic, Vesna Celakoska-Jordanova:
CANONICAL BIASSOCIATIVE GROUPOIDS

Lidija Goracinova-Ilieva, Smile Markovski:
Constructions of $(2,n)$-varieties of groupoids for $n=7,8,9$