Properties for ($\hat{I}\pm ,{\hat{I}}^2$)-harmonic functions

Jinjing Qiao, Jiale Chang, Antti Rasila

We investigate properties of ($\hat{I}\pm ,{\hat{I}}^2$)-harmonic functions. First, we discuss the coefficient estimates for ($\hat{I}\pm ,{\hat{I}}^2$)-harmonic functions. In particular, we obtain Heinz's inequality…