https://ejournal.unira.ac.id/index.php/jurnal_sigma <div class="journal-description"> <p> </p> <table style="height: 284px;" border="0" width="730" cellspacing="10" cellpadding="4"> <tbody> <tr valign="top"> <td width="20%"> <p><img src="https://ejournal.unira.ac.id/index.php/jurnal_sigma/management/settings/context/undefined" /></p> </td> <td width="40"> </td> <td valign="top" width="100%"> <table class="data" width="100%"> <tbody> <tr valign="top"> <td width="20%">Journal Title</td> <td width="40">: SIGMA</td> </tr> <tr valign="top"> <td width="20%">Initials</td> <td width="40">: SIGMA</td> </tr> <tr valign="top"> <td width="20%">Frequency</td> <td width="40">: 2 Issues every year (September and Maret)</td> </tr> <tr valign="top"> <td width="20%">DOI</td> <td width="40">: Prefix <a href="https://doi.crossref.org/servlet/publisherUserAdmin?sf=modify&amp;publisherID=87883">10.36513</a> </td> </tr> <tr valign="top"> <td width="20%">P-ISSN (print)</td> <td width="40">: <a href="http://issn.pdii.lipi.go.id/issn.cgi?daftar&amp;1449892885&amp;1&amp;&amp;">2502-0919</a></td> </tr> <tr valign="top"> <td width="20%">E-ISSN (online)</td> <td width="40">: <a href="http://issn.pdii.lipi.go.id/issn.cgi?daftar&amp;1550657308">2684-7698</a></td> </tr> <tr valign="top"> <td width="20%">Editor-in-Chief</td> <td width="40">: <a href="https://scholar.google.co.id/citations?hl=id&amp;user=zrZUc_kAAAAJ">Moh. Zayyadi</a></td> </tr> <tr valign="top"> <td width="20%">Publisher</td> <td width="40">: Prodi Pendidikan Matematika, FKIP, <a href="https://unira.ac.id/">Universitas Madura</a></td> </tr> </tbody> </table> </td> </tr> </tbody> </table> </div> <p><strong>We are proud to announce that SIGMA has been accredited by the National Journal Accreditation (ARJUNA) by Decree of Directorate General of Higher Education Ministry of National Education and Culture Republic of Indonesia No. <a href="https://drive.google.com/file/d/1eC4YI1bBg-WuCLXR4lr_og3RYUsH-Riq/view">355/DST/D.D1/HM.01.01/2026</a> on July 28, 2026 with fourth grade (Sinta 4)</strong></p> en-US https://ejournal.unira.ac.id/index.php/jurnal_sigma/announcement/view/6 SIGMA 2026-08-09