TY - JOUR AU - Feng Qi TI - Decreasing properties of two ratios defined by three and four polygamma functions JO - Comptes Rendus. Mathématique PY - 2022 SP - 89 EP - 101 VL - 360 PB - Académie des sciences, Paris DO - 10.5802/crmath.296 LA - en ID - CRMATH_2022__360_G1_89_0 ER -