The maximum order of a strong matching in a random graph
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A strong matching S in a given graph G is a set of disjoint edges {el' e2, ... , em} such that no other edge of the graph G connects an end-vertex of ei with an end-vertex of ej,(ei =Iej). Let Gn,p be the random graph on n vertices with fixed edge probability p, 0 < p < 1. It is shown that, with probability tending to 1 as n ~ 00, the maximum size f3 of a strong matching in Gn,p satisfies where Cl and C2 are constants depending only on p, and d = Resume Un couplage fort S dans un graphe G est un ensemble d'aretes disjointes {el' e2, ... , em} tel qu' aucune autre arete du graphe G ne relie une extremite de ei avec une extremite de ej, (ei =Iej). Soit Gn,p Ie graphe aIeatoire an sommets et de probabilite d'arete fixee p, 0 < p < l. On montre qu'avec une probabilite qui tend vers 1 quand n ~ 00, la taille maximum f3 d'un couplage fort dans Gn,p verifie 1 1 logd n "2 logd logd n Cl S; f3 S; logd n "2 logd logd n + C2 ou Cl and C2 sont deux constantes dependant seulement de p, et d = l~P' Australasian Journal of Combinatorics lO( 1994), pp.97-104
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