https://ejournal.unira.ac.id/index.php/jurnal_sigma/gateway/plugin/AnnouncementFeedGatewayPlugin/atom 2026-08-19T06:46:24+00:00 Open Journal Systems <table class="data" width="100%" style="background:#f4f6f8;border-collapse:collapse;"><tbody><tr valign="top"><td width="22%">Journal title</td><td width="78%"><strong>SIGMA</strong></td></tr><tr valign="top"><td width="22%">Initials</td><td width="78%"><strong>SIGMA</strong></td></tr><tr valign="top"><td width="22%">Frequency</td><td width="78%"><strong>2 issues every year (September and March)</strong></td></tr><tr valign="top"><td width="22%">DOI</td><td width="78%"><strong>10.36513</strong></td></tr><tr valign="top"><td width="22%">Print ISSN</td><td width="78%"><strong><a href="https://portal.issn.org/resource/ISSN/2502-0919" target="_blank" rel="noopener">2502-0919</a></strong></td></tr><tr valign="top"><td width="22%">Online ISSN</td><td width="78%"><strong><a href="https://portal.issn.org/resource/ISSN/2684-7698" target="_blank" rel="noopener">2684-7698</a></strong></td></tr><tr valign="top"><td width="22%">Editor-in-chief</td><td width="78%"><strong><a href="https://scholar.google.co.id/citations?hl=id&amp;user=zrZUc_kAAAAJ" target="_blank" rel="noopener">Moh. Zayyadi</a></strong></td></tr><tr valign="top"><td width="22%">Publisher</td><td width="78%"><strong><a href="https://unira.ac.id/" target="_blank" rel="noopener">Prodi Pendidikan Matematika FKIP Universitas Madura</a></strong></td></tr></tbody></table> <p><strong>SIGMA</strong> has been accredited by the National Journal Accreditation (ARJUNA) through Decree of the Directorate General of Higher Education, Research, and Technology No. <a href="https://drive.google.com/file/d/1eC4YI1bBg-WuCLXR4lr_og3RYUsH-Riq/view" target="_blank" rel="noopener">355/DST/D.D1/HM.01.01/2026</a> dated 28 July 2026, with grade four (Sinta 4).</p> https://ejournal.unira.ac.id/index.php/jurnal_sigma/announcement/view/7 2026-08-19T06:46:24+00:00 SIGMA 2026-08-19T06:46:24+00:00 https://ejournal.unira.ac.id/index.php/jurnal_sigma/announcement/view/6 2026-08-09T13:28:02+00:00 SIGMA 2026-08-09T13:28:02+00:00