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21 papers · 1 filter
Permutation statistics on involutions
W. M. B. Dukes
In this paper we look at polynomials arising from statistics on the classes of involutions, , and involutions with no fixed points, , in the symmetric group. Our results…
Star formation in RCW 108: triggered or spontaneous?
F. Comeron, N. Schneider, D. Russeil
We present visible, near IR, and mm-wave observations of RCW 108, a molecular cloud complex in the AraOB1 association that is being eroded by the energetic radiation of two O-type…
Wild monodromy and automorphisms of curves
Claus Lehr, Michel Matignon
Let be a complete discrete valuation ring of mixed characteristic with field of fractions containing the -th roots of unity. This paper is concerned with semi-st…
Generating functions for generating trees
Cyril Banderier, Philippe Flajolet, Daniele Gardy +3
Certain families of combinatorial objects admit recursive descriptions in terms of generating trees: each node of the tree corresponds to an object, and the branch leading to the n…
Abundances and ages of the deconvolved thin/thick disks of the Galaxy
Pascal Girard, Caroline Soubiran
We have investigated the abundance of several chemical elements in two large stellar samples kinematically representative of the thin and the thick disks of the Galaxy. Chemical, k…
Surface-mediated attraction between colloids
Hamid Kaidi, Thomas Bickel, Mabrouk Benhamou
We investigate the equilibrium properties of a colloidal solution in contact with a soft interface. As a result of symmetry breaking, surface effects are generally prevailing in co…