Abstract
We form, what we call, an afforested surface R over a plantation P by foresting with trees Tn (n $\in$ N: the set of positive integers). If all of P and Tn (n $\in$ N) belong to the class ${\mathscr O}_s$ of hyperbolic Riemann surfaces W carrying no singular harmonic functions on W, then we will show that, under a certain diminishing condition on roots of trees Tn (n $\in$ N), the afforested surface R also belongs to ${\mathscr O}_s$.
Citation
Mitsuru Nakai. Shigeo Segawa. "Types of afforested surfaces." Kodai Math. J. 32 (1) 109 - 116, March 2009. https://doi.org/10.2996/kmj/1238594549
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