tailieunhanh - Báo cáo hóa học: " Research Article Inequalities in Additive N-isometries on Linear N-normed Banach Spaces"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Research Article Inequalities in Additive N-isometries on Linear N-normed Banach Spaces | Hindawi Publishing Corporation Journal ofInequalities and Applications Volume 2007 Article ID 70597 12 pages doi 2007 70597 Research Article Inequalities in Additive N-isometries on Linear N-normed Banach Spaces Choonkil Park and Themistocles M. Rassias Received 5 December 2005 Revised 12 October 2006 Accepted 17 October 2006 Recommended by Paolo Emilio Ricci We prove the generalized Hyers-Ulam stability of additive N-isometries on linear N-normed Banach spaces. Copyright 2007 C. Park and T. M. Rassias. This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use distribution and reproduction in any medium provided the original work is properly cited. 1. Introduction Let X and Y be metric spaces. A mapping f X Y is called an isometry if f satisfies dY If x f y dx x y for all x y E X where dx and dY denote the metrics in the spaces X and Y respectively. For some fixed number r 0 suppose that f preserves distance r that is for all x y in X with dX x y r we have dY f x f y r. Then r is called a conservative or preserved distance for the mapping f . Aleksandrov 1 posed the following problem. Aleksandrov problem. Examine whether the existence of a single conservative distance for some mapping T implies that T is an isometry. The Aleksandrov problem has been investigated in several papers see 2 3 6-9 1315 20 23 26 28 . Rassias and Semrl 25 proved the following theorem for mappings satisfying the strong distance one preserving property SDOPP that is for every x y E X with x - yll 1 it follows that II f x - f y 1 and conversely. Theorem 25 . Let X and Y be real normed linear spaces such that one of them has dimension greater than one. Suppose that f X Y is a Lipschitz mapping with Lipschitz constant K 1. Assume that f is a surjective mapping satisfying SDOPP. Then f is an isometry. 2 Journal of Inequalities and Applications Definition 4 . Let X be a real linear space with dim X N and - . - XN R

TÀI LIỆU LIÊN QUAN
crossorigin="anonymous">
Đã phát hiện trình chặn quảng cáo AdBlock
Trang web này phụ thuộc vào doanh thu từ số lần hiển thị quảng cáo để tồn tại. Vui lòng tắt trình chặn quảng cáo của bạn hoặc tạm dừng tính năng chặn quảng cáo cho trang web này.