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JSci is a set of open source Java packages. The aim is to encapsulate scientific methods/principles in the most natural way possible. As such they should greatly aid the development of scientific based software. It offers: abstract math interfaces, linear algebra (support for various matrix and vector types), statistics (including probability distributions), wavelets, newtonian mechanics, chart/graph components (AWT and Swing), MathML DOM implementation, ... Note: some packages, like javax.comm, for the astro and instruments package aren't listed as dependencies (not available).

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package JSci.maths.fields;

/**
* This interface defines a field.
* @jsci.planetmath Field
* @version 1.0
* @author Mark Hale
*/
public interface Field extends Ring {
        /**
        * Returns true if one member is the inverse of the other.
        */
        boolean isInverse(Member a, Member b);

        /**
        * This interface defines a member of a field.
        */
        interface Member extends Ring.Member {
                /**
                * Returns the inverse member.
                */
                Member inverse();
                /**
                * The multiplication law with inverse.
                * @param f a field member
                */
                Member divide(Member f);
        }
}