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math.CV2015
A short proof of a Landen product identity for the Grötzsch ring function
Junyi Hu
We give a short, self-contained proof of a closed form for the infinite product associated with the Landen transformation of the Grötzsch ring function, combining the arithmetic-ge…
math.CV2015
A Better Lower Bound Estimation of Brennan's Conjecture
Junyi Hu, Shiyu Chen
In this paper, we obtained an equivalent proposition of Brennan`s conjecture. And given two lower bound estimation of the conjecture one of them connected with Schwarzian derivativ…