ar X iv : c on d - m at / 0 10 52 58 14 M ay 2 00 1 Predictability of large future changes in a competitive evolving population

ar X iv : m at h / 04 11 14 0 v 2 [ m at h . N T ] 4 M ay 2 00 5 THE 3 x + 1 SEMIGROUP

The 3x + 1 semigroup is the multiplicative semigroup S of positive rational numbers generated by { 2k+1 3k+2 : k ≥ 0} together with {2}. This semigroup encodes backwards iteration under the 3x + 1 map, and the 3x + 1 conjecture implies that it contains every positive integer. This semigroup is proved to be the set of positive rationals a b in lowest terms with b 6≡ 0( mod 3), and so contains al...

ar X iv : h ep - p h / 00 05 14 2 v 1 1 5 M ay 2 00 0 THE SUSY WORKING GROUP : Summary Report

The determination of the full SUSY QCD corrections to the production of squarks, gluinos and gauginos at hadron colliders is reviewed. The NLO corrections stabilize the theoretical predictions of the various production cross sections significantly and lead to sizeable enhancements of the most relevant cross sections. We discuss the phenomenological consequences of the results on present and fut...

ar X iv : 0 70 5 . 32 58 v 1 [ as tr o - ph ] 2 2 M ay 2 00 7 Disks around Young Binary Stars

ar X iv : h ep - p h / 01 05 19 8 v 1 1 9 M ay 2 00 1 ∂ m ∂ μ in the Nambu – Jona - Lasinio model

Using the Nambu–Jona-Lasinio (NJL) model we study responses of the pion and kaon masses to changes in the chemical potential, ∂m ∂μ , at zero and finite chemical potential. We find that the behavior of ∂m ∂μ for the pion is quite different from that for the kaon. Our results can give a clue for future studies of ∂m ∂μ on the lattice.

ar X iv : 0 90 5 . 04 58 v 1 [ m at h . L O ] 4 M ay 2 00 9 LES I - TYPES DU SYSTÈME F I - TYPES OF SYSTEM

We prove in this paper that the types of system F inhabited uniquely by λI-terms (the I-types) have a positive quantifier. We give also consequences of this result and some examples. Mathematics Subject Classification : 03B40, 68Q60