We present a new numerical iterative method for computing selected eigenpairs of a right definite two-parameter eigenvalue problem. The method works even without good initial approximations and is able to tackle large problems that are too expensive for existing methods. The new method is similar to the Jacobi–Davidson method for the eigenvalue problem. In each step, we first compute Ritz pairs...

together with appropriate boundary conditions, in the space Lw of functions square integrable with respect to the weight w, i.e., the normsquare of the space is ‖u‖2 = ∫ |u|2w. A basic assumption for this to be possible is that w ≥ 0. In some situations of interest this is not the case, but instead one has p > 0, q ≥ 0. One may then use as a norm-square the integral ∫ (p|u′|2 + q|u|2), and a pr...

more often patients refer for genetic counseling, without definite diagnosis. mostly people and some doctor! have the impression the all muscular dystrophy affected by boys but is carried by girles. more often review of medical history of theses patients resolved this finding different clinical (neurologists), physiotherapist (ncv,emg) and pathologists diagnosis and also negative result molecul...