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May 24, 2022 at 9:39 answer added R W timeline score: 2
Feb 9, 2022 at 18:21 comment added Moishe Kohan The most direct proof is to use the conformal unit ball model and check that a coordinate function is harmonic (if you know the definition of harmonicity, this will be immediate).
Feb 9, 2022 at 17:02 comment added Neal Realize $\mathbb{H}^n$ as the unit ball endowed with the hyperbolic metric. A function on the unit ball is harmonic with respect to the hyperbolic metric iff it is harmonic with respect to the Euclidean metric. So you can get harmonic functions on $\mathbb{H}^n$ by integrating a function on the boundary of the unit ball against the Poisson kernel.
Feb 9, 2022 at 16:09 history edited YCor
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Feb 9, 2022 at 15:58 history asked SMS CC BY-SA 4.0