Helfer ForeignHyper

Jan Burse, erstellt 18. Jan 2019
package jekpro.frequent.basic;
import jekpro.reference.arithmetic.SpecialCompare;
/**
* <p>The foreign evaluable functions for the module basic/hyper.</p>
* <p/>
* Warranty & Liability
* To the extent permitted by applicable law and unless explicitly
* otherwise agreed upon, XLOG Technologies GmbH makes no warranties
* regarding the provided information. XLOG Technologies GmbH assumes
* no liability that any problems might be solved with the information
* provided by XLOG Technologies GmbH.
* <p/>
* Rights & License
* All industrial property rights regarding the information - copyright
* and patent rights in particular - are the sole property of XLOG
* Technologies GmbH. If the company was not the originator of some
* excerpts, XLOG Technologies GmbH has at least obtained the right to
* reproduce, change and translate the information.
* <p/>
* Reproduction is restricted to the whole unaltered document. Reproduction
* of the information is only allowed for non-commercial uses. Selling,
* giving away or letting of the execution of the library is prohibited.
* The library can be distributed as part of your applications and libraries
* for execution provided this comment remains unchanged.
* <p/>
* Restrictions
* Only to be distributed with programs that add significant and primary
* functionality to the library. Not to be distributed with additional
* software intended to replace any components of the library.
* <p/>
* Trademarks
* Jekejeke is a registered trademark of XLOG Technologies GmbH.
*/
public final class ForeignHyper {
/**
* <p>Compute the arcus hyperbolic sine.</p>
*
* @param x The input.
* @return The output.
*/
public static double asinh(double x) {
return Math.log(x + Math.sqrt(x * x + 1.0));
}
/**
* <p>Compute the arcus hyperbolic cosine.</p>
*
* @param x The input.
* @return The output.
*/
public static double acosh(double x) {
return Math.log(x + Math.sqrt(x * x - 1.0));
}
/**
* <p>Compute the arcus hyperbolic tangent.</p>
*
* @param x The input.
* @return The output.
*/
public static double atanh(double x) {
return 0.5 * Math.log((x + 1.0) / (x - 1.0));
}
/**************************************************************/
/* CheerpJ Workaround */
/**************************************************************/
public static double epsilon() {
return SpecialCompare.EPSILON;
}
public static double pi() {
return Math.PI;
}
public static double e() {
return Math.E;
}
}

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