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hyperbolic function
(redirected from Hyperbolic map)

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hyperbolic function

In mathematics, one of a set of functions related to the hyperbola in the same way the trigonometric functions relate to the circle. They are the hyperbolic sine, cosine, tangent, secant, cotangent, and cosecant (written “sinh,” “cosh,” etc.). The hyperbolic equivalent of the fundamental trigonometric identity is cosh2z − sinh2z = 1. The hyperbolic sine and cosine, particularly useful for finding special types of integrals, can be defined in terms of exponential functions:

sinhx = (exex) ÷ 2 and coshx = (ex + ex) ÷ 2



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Other subjects examined include the Plancherel measure on shifted Young diagrams, results and problems in enveloping algebras arising from quantum groups, asymptotic behavior in the time synchronization model, stable densities and operators of fractional differentiation, and the distribution of ergodic sums for hyperbolic maps.
 
 
 
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