857 citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Hungarian Academy of SciencesHU402 papers
- Eötvös Loránd UniversityHU156 papers
- Budapest University of Technology and EconomicsHU58 papers
- Central European UniversityAT42 papers
- École Polytechnique Fédérale de LausanneCH31 papers
- Central European University - Budapest Campus24 papers
- University of PannoniaHU23 papers
- Centre National de la Recherche ScientifiqueFR21 papers
- University College LondonGB20 papers
- University of SzegedHU20 papers
- University of Illinois Urbana-ChampaignUS18 papers
- Charles UniversityCZ15 papers
25 papers · 1 filter
On types of growth for graph-different permutations
János Körner, Gábor Simonyi, Blerina Sinaimeri
We consider an infinite graph G whose vertex set is the set of natural numbers and adjacency depends solely on the difference between vertices. We study the largest cardinality of…
Cardinal sequences of LCS spaces under GCH
Juan Carlos Martinez, Lajos Soukup
We give full characterization of the sequences of regular cardinals that may arise as cardinal sequences of locally compact scattered spaces under GCH. The proofs are based on cons…
Failure of Wiener's property for positive definite periodic functions
Aline Bonami, Szilárd Gy. Révész
We say that Wiener's property holds for the exponent if we have that whenever a positive definite function belongs to for some , then necessarily bel…
Difference sets and the primes
Imre Z. Ruzsa, Tom Sanders
Suppose that A is a subset of {1,...,N} such that the difference between any two elements of A is never one less than a prime. We show that |A| = O(N exp(-c(log N)^{1/4})) for some…
On the existence of tight contact structures on Seifert fibered 3-manifolds
Paolo Lisca, Andras I. Stipsicz
We determine the closed, oriented Seifert fibered 3-manifolds which carry positive tight contact structures. Our main tool is a new non-vanishing criterion for the contact Ozsvath-…
Factorization of Laurent series over commutative rings
Gyula Lakos
We generalize the Wiener-Hopf factorization of Laurent series to more general commutative coefficient rings, and we give explicit formulas for the decomposition. We emphasize the a…
A twist in the geometry of rotating black holes: seeking the cause of acausality
Hajnal Andreka, Istvan Nemeti, Christian Wuthrich
We investigate Kerr-Newman black holes in which a rotating charged ring-shaped singularity induces a region which contains closed timelike curves (CTCs). Contrary to popular belief…
Symplectic surgeries and normal surface singularities
David T. Gay, Andras I. Stipsicz
We show that every negative definite configuration of symplectic surfaces in a symplectic 4--manifold has a strongly symplectically convex neighborhood. We use this to show that, i…
l-Adic representations associated to modular forms over imaginary quadratic fields
Tobias Berger, Gergely Harcos
Let pi be a regular algebraic cuspidal automorphic representation of GL(2) over an imaginary quadratic number field K such that the central character of pi is invariant under the n…
On finite groups whose derived subgroup has bounded rank
Karoly Podoski, Balazs Szegedy
Let be a finite group with derived subgroup of rank . We prove that $\gzz\leq |G'|^{2r}$. Motivated by the results of I. M. Isaacs in \cite{isa} we show that if is capab…
Free energy density for mean field perturbation of states of a one-dimensional spin chain
Fumio Hiai, Milan Mosonyi, Hiromichi Ohno +1
Motivated by recent developments on large deviations in states of the spin chain, we reconsider the work of Petz, Raggio and Verbeure in 1989 on the variational expression of free…
The classification question for Leavitt path algebras
G. Abrams, P. N. Ánh, A. Louly +1
We prove an algebraic version of the Gauge-Invariant Uniqueness Theorem, a result which gives information about the injectivity of certain homomorphisms between -grade…
Floer homology and singular knots
Peter Ozsvath, Andras I. Stipsicz, Zoltan Szabo
We define Floer homology theories for oriented, singular knots in S^3 and show that one of these theories can be defined combinatorially for planar singular knots.
Self-similar and self-affine sets; measure of the intersection of two copies
Márton Elekes, Tamás Keleti, András Máthé
Let K be a self-similar or self-affine set in R^d, let μbe a self-similar or self-affine measure on it, and let G be the group of affine maps, similitudes, isometries or translatio…
A limit relation for entropy and channel capacity per unit cost
I. Csiszar, F. Hiai, D. Petz
In a quantum mechanical model, Diosi, Feldmann and Kosloff arrived at a conjecture stating that the limit of the entropy of certain mixtures is the relative entropy as system size…
Inequalities for Multivariate Polynomials
Szilárd Gy. Révész
We summarize researches - in great deal jointly with my host Y. Sarantopoulos and his PhD. students V. Anagnostopoulos and A. Pappas - started by a Marie Curie fellowship in 2001 a…
Some polynomial inequalities on real normed spaces
Szilard Gy. Revesz
We consider various inequalities for polynomials, with an emphasis on the most fundamental inequalities of approximation theory. In the sequel a key role is played by the generaliz…
Schur type inequalities for complex polynomials with no zeros in the unit disk
Szilárd Gy. Révész
Starting out from a question posed by T. Erdélyi and J. Szabados, we consider Schur-type inequalities for the classes of complex algebraic polynomials having no zeroes within the u…
Local-global principles for 1-motives
David Harari, Tamas Szamuely
Building upon our arithmetic duality theorems for 1-motives, we prove that the Manin obstruction related to a finite subquotient $\Be (X)$ of the Brauer group is the only obstructi…
Invariant decomposition of functions with respect to commuting invertible transformations
Bálint Farkas, Viktor Harangi, Tamás Keleti +1
Consider a_1,a_2,...,a_n, arbitrary elements of R. We characterize those real functions f that decompose into the sum of a_j-periodic functions, i.e., f=f_1+...+f_n with D_{a_j}f(x…
The spectral decomposition of shifted convolution sums
Valentin Blomer, Gergely Harcos
We obtain a spectral decomposition of shifted convolution sums in Hecke eigenvalues of holomorphic or Maass cusp forms.
Multiplicative functions in arithmetic progressions
Antal Balog, Andrew Granville, K. Soundararajan
We develop a theory of multiplicative functions (with values inside or on the unit circle) in arithmetic progressions analogous to the well-known theory of primes in arithmetic pro…
Resolvability vs. almost resolvability
Istvan Juhasz, Saharon Shelah, Lajos Soukup
A space X is kappa-resolvable (resp. almost kappa-resolvable) if it contains kappa dense sets that are pairwise disjoint (resp. almost disjoint over the ideal of nowhere dense subs…
Convergent Sequences of Dense Graphs I: Subgraph Frequencies, Metric Properties and Testing
C. Borgs, J. T. Chayes, L. Lovasz +2
We consider sequences of graphs and define various notions of convergence related to these sequences: ``left convergence'' defined in terms of the densities of homomorphisms from s…