In construction of analytical solutions to open string field theories pure gauge configurations parameterized by wedge states play an essential role. These pure gauge configurations are constructed as perturbation expansions and to guaranty that these configurations are asymptotical solutions to equations of motion one needs to study convergence of the perturbation expansions. We demonstrate that for the large parameter of the perturbation expansion these pure gauge truncated configurations give divergent contributions to the equation of motion on the subspace of the wedge states. We perform this demonstration numerically for the pure gauge configurations related to tachyon solutions for the bosonic and NS fermionic SFT. By the numerical calculations we also show that the perturbation expansions are cured by adding extra terms. These terms are nothing but the terms necessary to make valued the Sen conjectures. that is the same as the equation of motion for the open bosonic and cubic superstring SFTs (one has just removed the hats in the later cases). Φ is 2 × 2 matrix where the components are string fields belonging to the GSO(+) and GSO(−) sectors. Pure 1 We call the NS fermionic SFT the NS string field theory with two sectors, GSO(+) and GSO(−) and we call the superstring SFT (SSFT) the NS string field theory with the GSO(+) sector only.2 The physical meaning of this solution is still unclear for us. It may happen that it is related with a spontaneous supersymmetry breaking (compare with [38]).3 Let us remind that the NS fermionic SFT with two sectors is used to describe non-BPS branes. The Sen conjecture has been checked by level truncations for the non-polynomial and cubic cases in [46] and [40], respectively.

Special perturbative pure gauge solutions parameterized by a pair of wedge states are parts of the nontrivial (not purely gauge) tachyon solutions of the cubic fermionic string field theory describing the non-BPS brane true vacuum. We demonstrate explicitly that for the large parameter of the perturbation expansion, these pure gauge configurations are no longer solutions of the equations of motion. We show that this problem is solved by adding an extra term that is just the term needed for the first Sen conjecture to hold.

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Simulation of hypogravitation under the conditions of cold exposure and their influence on the epithelium of the mucous membrane of the trachea of rats. Bûlleten' fiziologii i patologii dyhaniâ = Bulletin