Abstract
We prove a second fundamental theorem in the sense of Nevanlinna's theory of meromorphic functions replacing the constants a in $\bar N$ (r, f, a) by rational functions R with R(∞)=a. The key argument is Ahlfors's second fundamental theorem from his theory of covering surfaces.
Citation
Andreas Sauer. "Deficient rational functions and Ahlfors's theory of covering surfaces." Ark. Mat. 39 (1) 151 - 155, March 2001. https://doi.org/10.1007/BF02388796
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