TY JOUR TI Approximation by finite dimension linear systems in problems of quadratic exponential interpolation KW interpolation KW Gauss functions KW nod functions KW Jacobi theta-functions KW signals JO Actual directions of scientific researches of the XXI century: theory and practice AU Sitnik, S.. AU Timashov, A.. PY 2014 IS 2 PB FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov