In this talk, we show how the monodromy matrix, M̂, can be constructed for the two dimensional tree level string effective action. The pole structure of M̂ is derived using its factorizability property. It is shown that the monodromy matrix transforms non-trivially under the non-compact T-duality group, which leaves the effective action invariant and this can be used to construct the monodromy ma...

The 2 variation formula of the Seiberg-Witten functional is obtained in order to estimate the Morse index of redutible solutions (A, 0). It is shown that their Morse index is given by the dimension of the largest negative eigenspace of the operator △A + kg 4 , hence it is finite.

Touch is one of the most essential elements of human development, a profound method of communication, a critical component of the health and growth of infants, and a powerful healing force (Bowlby, 1952; Harlow, 1971, 1986). Ample research has demonstrated that tactile stimulation is extremely important for development and maintenance of physiological and psychological regulation in infants, ch...

I. Nagy1,2 and I. Aldazabal2,3 1Department of Theoretical Physics, Institute of Physics, Technical University of Budapest, H-1521 Budapest, Hungary 2Donostia International Physics Center DIPC, P. Manuel de Lardizabal 4, E-20018 San Sebastián, Spain 3Centro de Fı́sica de Materiales (CSIC-UPV/EHU) MPC, P. Manuel de Lardizabal 3, E-20018 San Sebastián, Spain (Received 28 January 2010; published 7 M...

The algebraic definition of charges for symmetry-preserving D-branes in WessZumino-Witten models is shown to coincide with the geometric definition, for all simple Lie groups. The charge group for such branes is computed from the ambiguities inherent in the geometric definition.