St. Petersburg Mathematical Journal, 17. cilt,1-551. sayfalar

algebraic analytic apply approximation arbitrary argument assume bounded called closed coefficients coincides complete condition connected Consequently consider constant construction contains continuous corresponding covering curves defined definition deformation denote depend determined dimension discrete edges element English equation equivalent estimate exists fact finite fixed formula function given Goursat problem graph identity implies inequality integral introduce invariant lattice Lemma limit linear locally Math Mathematical matrix means measure metric Moreover Note obtain operator parameters particular periodic Phys points polynomial positive potential problem Proof proof of Theorem Proposition prove quantum rational reduced regular relation Remark respectively result satisfies sequence side singular solution space spectrum statement Subsection suffices Suppose Theorem theory transformation unique values vector vertex vertices zero