Fixed point iteration for pseudocontractive maps

Citation
Ce. Chidume et C. Moore, Fixed point iteration for pseudocontractive maps, P AM MATH S, 127(4), 1999, pp. 1163-1170
Citations number
32
Categorie Soggetti
Mathematics
Journal title
PROCEEDINGS OF THE AMERICAN MATHEMATICAL SOCIETY
ISSN journal
00029939 → ACNP
Volume
127
Issue
4
Year of publication
1999
Pages
1163 - 1170
Database
ISI
SICI code
0002-9939(199904)127:4<1163:FPIFPM>2.0.ZU;2-P
Abstract
Let K be a compact convex subset of a real Hilbert space, H; T : K --> K a continuous pseudocontractive map. Let {a(n)}, {b(n)}, {c(n)}, {a'(n)}, {b'( n)} and{c'(n)} be real sequences in [0,1] satisfying appropriate conditions . For arbitrary x(1) is an element of K; define the sequence {x(n)}(n=1)(in finity) iteratively by x(n+1) = a(n)x(n) + b(n)Ty(n) + c(n)u(n); y(n) = a'( n)x(n) + b'(n)Tx(n) + c'(n)v(n); n greater than or equal to 1; where {u(n)} , {v(n)} are arbitrary sequences in K. Then, {x(n)}(n=1)(infinity) converge s strongly to a fixed point of T. A related result deals with the convergen ce of {x(n)}(n=1)(infinity) to a fixed point of T when T is Lipschitz and p seudocontractive. Our theorems also hold for the slightly more general clas s of continuous hemicontractive nonlinear maps.