Contents: (1) Inverse Matrix RSLPFLcircfr (0,1/b,0) of Order 3×3 to the Power of Positive Integer Using Adjoin Method; (2) Penentuan Solusi Optimal Pemrograman Kuadratik Menggunakan Metode Beale (Studi Kasus: Produksi Padi Kalimantan Barat); (3) Pelabelan Fibonacci Prima Ke-k Pada Graf H dan Graf Ulat H_n; (4) Optimasi Penugasan Mekanik Menggunakan Metode Hungarian pada Dealer AUTO 2000 di Kota Padang; (5) Implementasi Metode Fuzzy Black-Scholes Real Options Valuation pada Rencana Investasi Smelter Nikel; (6) Implementation of Particle Swarm Optimization (PSO) Method In Determining The Composition of Animal Feed In Broiler Chickens With Minimum Cost; (7)The Effect of Virotherapy, Chemotherapy, and Immunotherapy to Immune System: Mathematical Modelling Approach; (8) Kaitan Ruang Vektor Matriks V_n dan C_n; (9) Keterhubungan Graf Pembagi Tak Nol dari Ring.