Full name: 2021 4th International Conference on Mathematics and Statistics(ICoMS 2021)-Ei Compendex and Scopus Short name: ICoMS 2021 We welcome your participation and contribution to the 2021 4th International Conference on Mathematics and Statistics (ICoMS 2021) to be held in Paris, France during June 24-26, 2021. Conference Website: http://www.icoms.org/ Paper Publication: In the past 3 years, papers of ICoMS were published in ACM Conference Proceedings, indexed by Ei Compendex and Scopus. Papers of ICoMS 2021 will be published in International Conference Proceedings by ACM (ISBN: 978-1-4503-8990-7), which will be archived in ACM Digital Library, indexed by EI Compendex and SCOPUS. Excellent papers will be published in International Journal of Applied Physics and Mathematics (IJAPM) (ISSN: 2010-362X), indexed by EI (INSPEC, IET), Index Copernicus, CAS, etc. Conference Venue: Mercure Paris Roissy CDG Address: 3 Allée du Verger, 95700 Roissy-en-France E-mail: h1245-sb@accor.com Tel: 33 (0) 1.34.29.40.02 Submission and Contact Methods: Electronic Submission System: http://confsys.iconf.org/submission/icoms2021 E-mail: icoms@cbees.net Tel: +852-3500-0799 (Headquarter) / +86-28-86528465 (Branch Office) Conference Secretary: Ms. Zero Jiang ICoMS 2021 can provide a platform for academic communication in Mathematics and Statistics and related areas. For more conference information, please visit the conference website: http://www.icoms.org/.