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4 papers · 1 filter
Schur Multipliers and Spherical Functions on Homogeneous Trees
Uffe Haagerup, Troels Steenstrup, Ryszard Szwarc
Let X be a homogeneous tree of degree q+1 (for q between 2 and infinity) and let f be a complex function on X times X for which f(x,y) only depend on the distance between x and y i…
The Suslinian number and other cardinal invariants of continua
T. Banakh, V. V. Fedorchuk, J. Nikiel +1
By the {\em Suslinian number} $\Sln(X)$ of a continuum we understand the smallest cardinal number such that contains no disjoint family $\C$ of non-degenerate subcontin…
Quantum critical point in high-temperature superconductors
V. R. Shaginyan, M. Ya. Amusia, K. G. Popov +1
Recently, in high-T_c superconductors (HTSC), exciting measurements have been performed revealing their physics in superconducting and pseudogap states and in normal one induced by…
Energy scales and magnetoresistance at a quantum critical point
V. R. Shaginyan, M. Ya. Amusia, A. Z. Msezane +2
The magnetoresistance (MR) of CeCoIn_5 is notably different from that in many conventional metals. We show that a pronounced crossover from negative to positive MR at elevated temp…