We study the generalization of noncommutative gauge theories to the case of orthogonal and symplectic groups. We find out that this is possible, since we are allowed to define orthogonal andâ€¦ (More)

The Matrix String Theory, i.e. the two dimensional U(N) SYM with N = (8, 8) supersymmetry, has classical BPS solutions that interpolate between an initial and a final string configuration via aâ€¦ (More)

The correspondence between Matrix String Theory in the strong coupling limit and IIA superstring theory can be shown by means of the instanton solutions of the former. We construct the generalâ€¦ (More)

We discuss the problem of noncommutative SO(N) gauge field theories from the string oneâ€“loop point of view. To this end we propose an expression for the string propagator on the boundary of theâ€¦ (More)

This paper is primarily devoted to the ghost wedge states in string field theory formulated with the oscillator formalism. Our aim is to prove, using such formalism, that the wedge states can beâ€¦ (More)

We define a sequence of VSFT Dâ€“branes whose low energy limit leads exactly to a corresponding sequence of GMS solitons. The Dâ€“branes are defined by acting on a fixed VSFT lump with operators definedâ€¦ (More)

We give a simple proof that the Neumann coefficients of surface states in Wittenâ€™s SFT satisfy the Hirota equations for dispersionless KP hierarchy. In a similar way we show that the Neumannâ€¦ (More)

Extending a recent result of S.B. Giddings, F. Hacquebord and H. Verlinde, we show that in the U(N) SYM Matrix theory there exist classical BPS instantons which interpolate between different closedâ€¦ (More)

The first two Hamiltonian structures and the recursion operator connecting all evolution systems and Hamiltonian structures of the N = 2 supersymmetric (n, m)-GNLS hierarchy are constructed in termsâ€¦ (More)