The name Lobachevsky's function is sometimes given to the function
also denoted , where is Clausen's integral.
The name Lobachevsky's function is sometimes given to the function
also denoted , where is Clausen's integral.
Weisstein, Eric W. "Lobachevsky's Function." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/LobachevskysFunction.html