Basis property of the eigenfunctions of a generalized gasdynamic Frankl problem with a nonlocal evenness condition and with a discontinuity in the solution gradient

On the Finding the Other Eigenvalues and Eigen Functions and Ortogonal Basis with a Nonlocal Parity Condition of the Third Kind

“…The problem was further developed in [2, pp.339-345], [12, pp.235-252]. Several authors have also have investigated this issue (see [1][2][3][4][5][6][7][8][9][10][11][12][13]). On the solution of the Frankl prolem in a special domain in [12].…”

“…About construction of the gasedynamic problem of Frankl in [11]. Basis property of eigen -functions of the generalized problem of Frankl with a nonlocal parity condition and with the discontinuity of the gradient of solution in [9].…”