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14 papers · 1 filter
Group algebras whose group of units is powerful
V. A. Bovdi
A p-group is called powerful if every commutator is a product of pth powers when p is odd and a product of fourth powers when p=2. In the group algebra of a group G of p-power orde…
Correlation and confinement induced itinerant ferromagnetism in chain structures
Reka Trencsenyi, Endre Kovacs, Zsolt Gulacsi
Using a positive semidefinite operator technique one deduces exact ground states for a zig-zag hexagon chain described by a non-integrable Hubbard model with on-site repulsion. Fla…
Analytic integration of real-virtual counterterms in NNLO jet cross sections II
P. Bolzoni, S. Moch, G. Somogyi +1
We present analytic expressions of all integrals required to complete the explicit evaluation of the real-virtual integrated counterterms needed to define a recently proposed subtr…
Optimal systems of fundamental S-units for LLL-reduction
Lajos Hajdu
We show that a particular parameter plays a vital role in the resolution of S-unit equations, at the stage where LLL-reduction is applied. We define the notion of optimal system of…
Comparison of renormalization group schemes for sine-Gordon type models
I. Nandori, S. Nagy, K. Sailer +1
The scheme-dependence of the renormalization group (RG) flow has been investigated in the local potential approximation for two-dimensional periodic, sine-Gordon type field-theoric…
Kimmerle conjecture for the Held and O'Nan sporadic simple groups
V. Bovdi, A. Grishkov, A. Konovalov
Using the Luthar--Passi method, we investigate the Zassenhaus and Kimmerle conjectures for normalized unit groups of integral group rings of the Held and O'Nan sporadic simple grou…