Results 101 to 110 of about 153 (127)

Dynamic treatment regimes: technical challenges and applications. [PDF]

open access: yesElectron J Stat, 2014
Laber EB   +4 more
europepmc   +1 more source

Nonlinear Contractions on Semimetric Spaces

Journal of Applied Analysis, 1995
Abstract Let (X, d) be a Hausdorff semimetric (d need not satisfy the triangle inequality) and d–Cauchy complete space. Let ƒ be a selfmap on X, for which d(ƒx, ƒy) ≤ φ(d(x, y)), (x, y ∈ X), where φ is a non– decreasing function from R +, the nonnegative reals, into R + such that φn ...
J. Jachymski   +2 more
exaly   +3 more sources

Caristi’s fixed point theorem in semimetric spaces

Journal of Fixed Point Theory and Applications, 2018
In [Lect. Notes Math. 490, 74--83 (1975; Zbl 0315.54052)], \textit{J. Caristi} and \textit{W. A. Kirk} proved an interesting fixed point theorem in complete metric space for $T$ satisfying a special condition. This result was extended by \textit{W. A. Kirk} and \textit{N. Shahzad} [J. Fixed Point Theory Appl. 17, No. 3, 541--555 (2015; Zbl 1326.54045)]
Tomonari Suzuki, Suzuki Tomonari
exaly   +2 more sources

Fixed points and Cauchy sequences in semimetric spaces

Journal of Fixed Point Theory and Applications, 2015
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
W A Kirk   +2 more
exaly   +2 more sources

On regular semimetric spaces having strong triangle functions

Journal of Fixed Point Theory and Applications, 2016
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Nguyen Vân Dung, Võ Thi Lệ Hằng
exaly   +3 more sources

MAPPINGS CONTRACTING THE TOTAL PAIRWISE DISTANCES IN SEMIMETRIC SPACES WITH TRIANGLE FUNCTIONS: PERIODIC AND MULTIPLE FIXED POINTS

Journal of Mathematical Sciences
This paper extends a recently introduced class of mappings contracting the total pairwise distances - an n-point extension of the Banach contraction principle - within the framework of semimetric spaces, employing triangle functions as defined by Bessenyei and Páles in [13].
Ravindra K Bisht, Bisht Ravindra K
exaly   +2 more sources

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