Editorial Board

Tadayoshi ADACHI Graduate School of Human and Environmental Studies, Kyoto University, Japan Shigeaki KOIKE Faculty of Science and Engineering, Waseda University, Japan Hiroshi KOKUBU Graduate School of Science, Kyoto University, Japan Hideo KOZONO Faculty of Science and Engineering, Waseda University, Japan Shu NAKAMURA Faculty of Science, Gakushuin University, Japan NGUYEN Van Minh Department of Mathematics and Statistics, University of Arkansas at Little Rock, USA Hidetaka SAKAI Graduate School of Mathematical Sciences, The University of Tokyo, Japan Hideo TAKAOKA Graduate School of Science, Kobe University, Japan Yoshitsugu TAKEI Faculty of Science and Engineering, Doshisha University, Japan

About the FUNKCIALAJ EKVACIOJ

__ The FUNKCIALAJ EKVACIOJ (International Series) was founded in April, 1958, and is published as a peer-reviewed journal three times per year by the DEPARTMENT OF MATHEMATICS, KOBE UNIVERSITY under the editorship of the DIVISION OF FUNCTIONAL EQUATIONS, THE MATHEMATICAL SOCIETY OF JAPAN. It serves for publishing original articles concerning the study of functional equations and related topics. Contribution is free of charge, and there are no restrictions on who can contribute. Titles of papers in previous volumes are found in this web site. __ Inquiries except subscription orders should be written to: Division of Functional Equations The Mathematical Society of Japan c/o Faculty of Science, Kobe University Kobe 657–8501, Japan

Subscription

__ Subscription should be prepaid. The price is $240.00 a volume (three numbers). Orders for subscription and back numbers are handled by: Japan Publications Trading Co., Ltd. P.O.Box 5030, Tokyo International, Tokyo, Japan (2–1 Sarugaku-cho 1–chome, Chiyoda–ku, Tokyo, Japan) (FAX:+81(Japan)-3-3292-0410) The electronic version is provided only for subscribers of the paper version.

Instruction for authors

__ The papers should be submitted electronically. Each manuscript should be prepared by using LaTeX with \documentclass[a4paper,12pt]{article}______(LaTeX 2e) Do not use any local commands, nor macros. __ The manuscript should contain the following: ____ 1. Abstract (of approximately 10 lines without mathematical formulas and citation of references) ____ 2. Key Words and Phrases ____ 3. 2020 Mathematics Subject Classification Numbers These should be put before Introduction, and no footnotes may be added except one acknowledging financial support. Please avoid writing mathematical formulae inside the text environment in a way that causes excessive spacings between the lines or inappropriate line widths. For example, authors are asked to use mathematical formulae such as $1/2$, $\lim_{n\to\infty}$, $\sum_{n=1}^{\infty}$, unless there is some special reason. Please also check the style of our bibliography in recent publications. Especially, our format of author names is "the family name, the initial of the first name". __ The source file and the PDF file of the manuscript should be sent via e-mail to fe-submission(at)math.kobe-u.ac.jp (replace "(at)" with "@")

Copyright Agreement

__ This electronic journal is provided by the authors and DIVISION OF FUNCTIONAL EQUATIONS OF MATHEMATICAL SOCIETY OF JAPAN (DFE in short) ``AS IS'' and any express or implied warranties are disclaimed. In no event shall the authors or DFE are liable for any direct, indirect, incidental, special, exemplary, or consequential damages. __ DFE holds the exclusive copyright of this electronic journal. Redistribution of articles is not allowed without a written permission from DFE.

Policies on self-archiving

__ By "self-archiving", we mean archiving at the author's university or institute, or non-commercial preprint servers such as arxiv.org. The author can archive pre-prints. The author can archive post-prints (final draft post-refereeing). The pre or post print archived must include the publication data (journal name - Funkcialaj Ekvacioj, volume, year, page numbers, and the journal URL). The PDF file generated by us (the publisher) must not be self-archived.

Open access

__ The author can buy the publisher PDF (2500yen/page, 25dollars/page). The PDF can be distributed without any restriction. For example, the author can put the publisher's PDF at a repository of the author's institute. Please contact fe-admin(at)math.kobe-u.ac.jp (replace "(at)" with "@") as to the open access.