Integral hyperbolic cosine
The special function defined, for real , by
Sometimes it is denoted by .
For references, see Integral cosine.
This function, which is seldom used because of its relation with the cosine integral, is also called the hyperbolic cosine integral. It can, of course be defined (as above) for .
Integral hyperbolic cosine. Encyclopedia of Mathematics. URL: http://encyclopediaofmath.org/index.php?title=Integral_hyperbolic_cosine&oldid=12550