Due to maintenance process to improve the quality of our service and to move the journal server hosting, we sadly to announce that we will be no longer receive any submission made through this website. New submission can only be done through our new website. The latest link will be informed in the near future. We will still be using this website (kalamatika.matematika-uhamka.com) for atleast in the next two years to display the last published artcles from volume 7 no 1 2022 backward. We are sorry for the inconvenient and we hope your understanding. Best regards Editor in Chief Krisna Satrio Perbowo