摘要
The authors prove some monotonicity properties of functions involving the generalized Agard distortion function ηg（a,t）, and obtain some inequalities for ηk（a, t） and relative distortion functions.
The authors prove some monotonicity properties of functions involving the generalized Agard distortion function ηg（a,t）, and obtain some inequalities for ηk（a, t） and relative distortion functions.
基金
supported by the Natural Science Foundation of China(11071069 and 11171307)
the Natural Science Foundation of the Department of Education of Zhejiang Province(Y201328799)
