hyperbolic logarithm การใช้

• A . A . de Sarasa interpreted the quadrature as a logarithm and thus the geometrically defined natural logarithm ( or " hyperbolic logarithm " ) is understood as the area under to the right of.
• In reality none of the previous proofs are acceptable by modern standards : Euler's computations involve the infinity ( and the hyperbolic logarithm of infinity, and the logarithm of the logarithm of infinity ! ); Legendre's argument is heuristic; and Chebyshev's proof, although perfectly sound, makes use of the Legendre-Gauss conjecture, which will be proved in 1896 and then be better known as the prime number theorem.