ISBN-13: 9788876421402 / Angielski / Miękka / 2004 / 105 str.
ISBN-13: 9788876421402 / Angielski / Miękka / 2004 / 105 str.
The lectures concentrate on some old and new relations between quasiderivatives of solutions to Ito stochastic equations and interior smoothness of harmonic functions associated with degenerate elliptic equations. Recent progress in the case of constant coefficients is discussed in full detail.