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The study of Gaussian convolution semigroups is a subject at the cross- road between abstract and concrete problems in harmonic analysis. This article suggests selected open problems that are in lar...
Let G be a compact separable topological group. When does there exist a probability P such that P P = U ,where U is Haarmeasure and P + U? We show that such square roots exist if and only if G is ...
Galaxies in compact groups tend to be deficient in neutral hydrogen compared to isolated galaxies of similar optical properties. In order to investigate the role played by a hot intragroup medium (IGM...
We present new Green Bank Telescope (GBT) 21 cm neutral hydrogen (H I) observations of a complete distance-limited sample of 22 Hickson Compact Groups (HCGs) with at least four true members. We detect...
We present a comprehensive study on the impact of the environment of compact galaxy groups on the evolution of their members using a multi-wavelength analysis, from the UV to the infrared, for a sampl...
The most distant compact groups     most distant  compact groups       font style='font-size:12px;'> 2011/10/9
We present photometric and spectroscopic observations of the members of three previously cataloged compact group (CG) candidates at redshifts z>0.3. These confirm spectroscopic redshifts compatible wi...
For a topological group G the intersection KOR(G) of all kernels of ordinary representations is studied. We show that KOR(G) is contained in the center of G if G is a connected pro-Lie group.
Let Mn be a random element of the unitary, special orthogonal, or unitary symplectic groups, distributed according to Haar measure. By a classical result of Diaconis and Shahshahani, for large matrix ...
On second cohomology of duals of compact groups     compact groups  math       font style='font-size:12px;'> 2010/11/23
We show that for any compact connected group G the second cohomology group defined by unitary invariant 2-cocycles on \hat G is canonically isomorphic to H^2(\widehat{Z(G)};T). This implies that the ...
The Idilico Project. Dynamical Evolution of Compact Groups. Supercomputer Simulations。
AGN Population in Compact Groups Galaxies     AGN Population  Compact Groups Galaxies       font style='font-size:12px;'> 2009/7/9
AGN Population in Compact Groups Galaxies。
Stellar populations in elliptical galaxies of compact groups
Galaxy evolution in a new Southern Compact Groups sample。
Hickson Compact Groups: The Cores of Elongated Loose Groups

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