We consider electric-magnetic duality(S-duality) in IIB matrix model with a D3-brane background. We propose the duality transformation by considering that of noncommutative Yang-Mills theory(NCYM) in four dimension. NCYM derived from the matrix model has a Yang-Mills coupling related to the noncommutativity of the spacetime. We argue that open strings bits as bi-local fields on the spacetime ar...

Recently, noncommutative theories have received renewed interest, after it was found that noncommutative theories can be naturally realized in M theory compactified in the presence of constant three-form field background @1# and within string theories as the worldvolume theory of a D-brane with a nonzero constant Neveu-Schwarz ~NS! B field @2,3#. In the case of a D-brane with a constant magneti...

We analyze certain brane bound states in M-theory and their descendants in type IIA string theory, all involving 3-form or 2-form background fluxes. Among them are configurations which represent NCYM, NCOS and ODp-theories in the scaling limit of OM-theory. In particular, we show how the conditions for the embedding to preserve supersymmetry are modified by the presence of the flux and discuss ...

We study some aspects of open string theories on D-branes with critical electric fields. We show that the massless open string modes that move in the direction of the electric field decouple. In the 1+1 dimensional case the dual theory is U(N) SYM with electric flux, and the decoupling of massless open strings is dual to the decoupling of the U(1) degrees of freedom. We also show that, if the d...

We present a simple model of common ownership in which an investor chooses its stake competing firms light the effects on firm behavior and profits. Two compete Cournot duopoly, affects firm’s objective function manner posited by Bresnahan & Salop (1986) O’Brien (2000). show that with equal stakes both firms—a so‐called concentrated owner (CCO)—places greater value additional share firm, compar...

The formation of healthy gametes depends on programmed DNA double-strand breaks (DSBs), which are each repaired as a crossover (CO) or non-crossover (NCO) from a homologous template. Although most of these DSBs are repaired without giving COs, little is known about the genetic requirements of NCO-specific recombination. We show that Fml1, the Fanconi anemia complementation group M (FANCM)-ortho...

Studies in the yeast Saccharomyces cerevisiae have validated the major features of the double-strand break repair (DSBR) model as an accurate representation of the pathway through which meiotic crossovers (COs) are produced. This success has led to this model being invoked to explain double-strand break (DSB) repair in other contexts. However, most non-crossover (NCO) recombinants generated dur...

We investigate asymptotic behaviors of the strong coupling limit in the N = 2 supersymmetric non-commutative Yang-Mills theory. The strong coupling behavior is quite different from the commutative one since the non-commutative dual U(1) theory is asymptotic free, although the monodoromy is the same as that of the ordinary theory. Singularities are produced by infinitely heavy monopoles and dyon...

We investigate new compactifications of OM theory giving rise to a 3+1 dimensional open string theory with noncommutative x-x and x-x coordinates. The theory can be directly obtained by starting with a D3 brane with parallel (near critical) electric and magnetic field components, in the presence of a RR scalar field. The magnetic parameter permits to interpolate continuously between the x-x non...