We argue that open N = 2 string theory on spacetime with signature (2, 2), when covariantized with respect to SO(2, 2) and supersymmetrized a la Siegel, becomes equivalent to the topological A model on CP3|4 with branes wrapped on RP3|4. Worldsheet instantons ending on the branes deform the self-dual Yang-Mills to ordinary Yang-Mills. Moreover, we propose that mirror symmetry may explain the re...

A bstract Symmetries of the Two-Higgs-Doublet Model (2HDM) potential that can be extended to whole Lagrangian, i.e. CP-symmetries CP1, CP2, CP3 and Higgs-family symmetries Z 2 , U(1) SO(3) are discussed. Sufficient necessary conditions in terms constraints on masses physical couplings for respect each these found. Each symmetry realized through several alternative cases, case being a set relati...

We perform a detailed study of bosonic type IIA string theory in a large light-cone momentum / near plane wave limit of AdS4 × CP3. In order to attain this we derive the Hamiltonian up to cubic and quartic order in number of fields and calculate the energies for string excitations in a R×S2×S2 subspace. The computation for the string energies is performed for arbitrary length excitations utiliz...

A set S is convex if for every pair of points P, Q~S, the line segment PQ is contained in S, This definition can be generalized in various ways. One class of generalizations makes use of k-tuples, rather than pairs, of points-for example, Valentine's property P3: For every triple of points P, Q, R of S, at least one of the line segments PQ, QR, or RP is contained in S. It can be shown that if a...

We define a fixed point action in two-dimensional lattice CP models. The fixed point action is a classical perfect lattice action, which is expected to show strongly reduced cutoff effects in numerical simulations. Furthermore, the action has scale-invariant instanton solutions, which enables us to define a correct topological charge without topological defects. Using a parametrization of the f...

While depsidones, depsides or dibenzofuran-like compounds dominate the chemical composition of lichens, cyanolichen Nephroma laevigatum affords a diversity quinoid pigments represented by chlorinated anthraquinones derived from emodin and new bianthrones resulting homo- heterodimerization monomers. Bianthrones were pointed out dichloromethane extract MS/MS-based molecular networking, then isola...