IMPLEMENTATION OF KALMAN FILTER, RECURRENT NEURAL NETWORK, AND DECISION TREE METHOD TO FORECAST HIV CASES IN EAST JAVA - Nurwijayanti, Nurwijayanti; Yudianto, Firman; Radono, Panca; Sinulungga, Rizky Amalia; Romli Arief, Mochammad; Utami, Rahayu Budi; Arof, Hamzah (BAREKENG: Jurnal Ilmu Matematika dan Terapan, 2026)