4 Commits

Author	SHA1	Message	Date
Pat Grasso	57f082f64d	Use internal sign() (Math.sign only in ES2015+)	2016-10-20 15:33:10 -04:00
Pat Grasso	ee41e35b5c	Fix erf(bignumber) -> bignumber to return proper value ... Note: The precision for the bignumber returned may not be accurate, as the `erf()` approximation only guarantees precision to a certain degree.	2016-10-20 15:33:10 -04:00
Pat Grasso	80fd73c115	Update submodule index files to include erf	2016-10-20 15:33:09 -04:00
Pat Grasso	6ae793edea	Implement erf(x) using W. J. Cody's approximation ... Translate the Fortran77 implementation of W. J. Cody's "Rational Chebyshev Approximations for the Error Function". Place in new function subdirectory, `function/special`, because this function doesn't seem to fit into any other category.	2016-10-20 15:33:09 -04:00