Variational principles using a non-symmetric non-triangular distance

We consider Borwein-Preiss and Ekeland variational principles using a distance function that neither is symmetric nor enjoy the triangular inequality. All the given results rely exclusively on the convergence and continuity behaviors induced synthetically by the distance function itself without any topological implications. At the end of the paper, we also present two applications; the Caristi fixed point theorem and an existence theorem for equilibrium problems.

Authors

Institutions

Publication Details

Journal
Fixed Point Theory and Algorithms for Sciences and Engineering
Published
2026-01-22
DOI
https://doi.org/10.1186/s13663-026-00824-w
Primary Topic
Optimization and Variational Analysis
Type
article
Field-Weighted Citation Impact
0.00
Controls
|||
ALL TIME
JAN
FEB
MAR
APR
MAY
JUN
JUL
AUG
SEP
OCT
article

Variational principles using a non-symmetric non-triangular distance

Parin Chaipunya, Poom Kumam, Natthaya Boonyam
Fixed Point Theory and Algorithms for Sciences and Engineering
Optimization and Variational Analysis
article

Variational principles using a non-symmetric non-triangular distance

Parin Chaipunya, Poom Kumam, Natthaya Boonyam
article en

Abstract

We consider Borwein-Preiss and Ekeland variational principles using a distance function that neither is symmetric nor enjoy the triangular inequality. All the given results rely exclusively on the convergence and continuity behaviors induced synthetically by the distance function itself without any topological implications. At the end of the paper, we also present two applications; the Caristi fixed point theorem and an existence theorem for equilibrium problems.

Fixed Point Theory and Algorithms for Sciences and EngineeringVol. 2026(1)
King Mongkut's University of Technology Thonburi (TH)
Reduced inequalities
Openalex Percentile: Top 79%
Optimization and Variational Analysis
AI Navigator

Ask Laika to Summarize, Analyze, and Connect papers live on the map.

Summarize Papers & Methodologies

Extract key findings, datasets, and comparative methods across publications.

Benchmark Rankings & Visual Analytics

Rank top research institutions, authors, funders, topics, and journals by Field-Weighted Citation Impact (FWCI) and paper volume with instant charts.

Connect Distant Disciplines

Bridge topological clusters on the map to find hidden collaborative intersections.

Variational principles using a non-symmetric non-triangular distance — Parin Chaipunya, Poom Kumam, et al. · Fixed Point Theory and Algorithms for Sciences and Engineering (2026) | TGRS Research Map | TGRS