Let VZu+k2u+k2a~(z)u+V.(a~(~)Vu) = -6(cc-y) inR3, where al(z) EL’(D), a&) E H’(D), D E R3_ = {z : 13 < 0) is a finite region, aj(Z) = 0 outside of D, j = 1,2, 1 + 02 > 0, al = El. Assume that thedatau(l,y,k),V~,yEP={I:13=0}8ndallkE(O,ko),ko>O is an arbitrary small number, are given. THEOREM. The above data determine aj(z), j = 1,2, uniquely.

Given a positive integer p, we develop a method to construct difference equations of order greater than or equal to 2 such that all solutions of which are periodic of the same period p. The method of construction is based on a class of symmetric functions that we call “isovertible” functions. © 2005 Elsevier Ltd. All rights reserved. MSC: 39A10

Here is a direct problem for Sidon sets: Given linear form $$\varphi = c_1 x_1 + \cdots c_h x_h $$ , construct and describe sets A that are . This paper considers an inverse set A, determine the forms such

The anticancer anthracycline compound Adriamycin is a known topoisomerase II inhibitor but is also capable of exerting other cellular consequences. After intercalation, Adriamycin can form covalent adducts with DNA, and the magnitude of these adducts appears to be limited by the cellular availability of formaldehyde. Adducts produced by Adriamycin in the presence of formaldehyde have been well ...