From author’s summary: “We first prove a theorem concerning higher order logarithmic partial derivatives for meromorphic functions of several complex variables. Then we show the best nature of the Second Main Theorem in Nevanlinna theory under two different assumptions of non-degeneracy of meromorphic mappings \(f : \mathbb{C}^n \to \mathbb{P}^m\) for arbitrary positive integers \(n\) and \(m\). Moreover, we derive an upper bound of the error term in the Second Main Theorem for meromorphic mappings of finite order. Finally, we demonstrate the sharpness of all upper bounds in our main theorems.”
The paper has a useful introduction and is well written and organized.