TY JOUR TI Parabolic equation with periodic condition on the so¬lution and the projection-difference method of its approximate solution KW Hilbert space KW parabolic equation KW periodic condition KW projection-difference method KW time-implicit Euler’s method JO Actual directions of scientific researches of the XXI century: theory and practice AU Bondarev, A.. PY 2014 IS 2 PB FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov