Time series analysis and forecasting of unemployment in Purbalingga Regency using Brown’s double exponential smoothing: An accuracy-based evaluation. Perspectives in Mathematics and Applications, [S. l.], v. 2, n. 01, p. 12–26, 2026. DOI: 10.66256/permata.v2i1.43. Disponível em: https://jurnal.kreasipustaka.com/index.php/permata/article/view/43. Acesso em: 1 jun. 2026.