The Soedirman’s International Conference on Mathematics and Applied Sciences (SICoMAS) 2021 is the second SICoMAS series hosted by the Faculty of Mathematics and Natural Sciences, Universitas Jenderal Soedirman. As the development of technology and management of world resources for our future based on the innovation in Mathematics and Sciences, this conference takes issue “Fundamental, Flexibility, and Innovation in Mathematics and Sciences’. The conference was be held from October 20 - 21, 2021 using an online platform.

SICoMAS 2021 aims to provide a platform for researchers, lecturers, teachers, students, practitioners, and industrial professionals to share knowledge, exchange ideas, collaborate, and present research results in the fields of Mathematics, Chemistry, Physics, and their applications. Hence, my sincere gratitude goes to our five keynote speakers (Prof. Yoshitada Morikawa, Ph.D. – Osaka University-Japan, Drs. Budi Pratikno, M.Stat.Sci., Ph.D. – Universitas Jenderal Soedirman-Indonesia, Edy Giri Rachman Putra, Ph.D. – BATAN-Yogyakarta, Indonesia, Drs. Suryo Eko Hadiyanto, MM. – President Director of PT. Bukit Asam – Indonesia, Prof. Guiseppe Di Fazio, Ph.D. - Universitá de Catania - Italy), and our nine invited speakers (Prof. Rodiansono, Ph.D. - Universitas Lambung Mangkurat – Indonesia, Zulkaida Akbar, Ph.D. - University of Virginia – USA, Dr. Gnanasangeetha Gnanapragasam - University of Madras – India, Dr. Wolfgang Bock - Technische Universität Kaiserslautern – Germany, Dr. Oliver Tse - Technische Universität Eindhoven – Netherland, Wahyu Satrio Putro, Ph.D. - National Institute of Advanced Industrial Science and Technology (AIST) –Japan, Dr. Kartika Sari - Universitas Jenderal Soedirman-Indonesia, Sri Maryani, Ph.D. - Universitas Jenderal Soedirman-Indonesia, Amin Fatoni, Ph.D. - Universitas Jenderal Soedirman-Indonesia) for sharing their expertise in this conference. My deepest appreciation also goes to our 56 presenters and more than 300 non presenters for their participation in that conference.

Selected papers published in the proceeding of Advanced in Physics Research by Atlantis Press are 25 which are divided in 3 fields, chemistry, mathematics, and physics. So, I greatly thank Universitas Jenderal Soedirman, all our contributors, and all the members of the committee for the invaluable support that makes this conference a reality. A special thank PT. Cipta Khariama Utama for contribution to this conference.

Finally, I would like to apologize for any short comings found in this conference and hopefully this conference is be engraved in your memory.

The Chairman of SICoMAS 2021
Jamrud Aminuddin, Ph.D.