/*
 * Copyright (c) 2004-2005, DoodleProject
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 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
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package jhplot.math.num;

/**
 * Common constants found in mathematical formulas.
 * 
 * @version $Revision: 1.2 $ $Date: 2007/10/25 04:44:23 $
 */
public interface Constants {

    /** 2 π. */
    double PI_2 = Math.PI + Math.PI;

    /** log(2 π). */
    double LOG_2_PI = Math.log(Math.PI + Math.PI);

    /** 1/2 * log(2 π). */
    double HALF_LOG_2_PI = 0.5 * LOG_2_PI;

    /** √2. */
    double SQRT_2 = Math.sqrt(2.0);
}