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Java > Open Source Codes > JSci > maths > fields > Ring


1 package JSci.maths.fields;
2
3 import JSci.maths.groups.AbelianGroup;
4
5 /**
6 * This interface defines a ring.
7 * @jsci.planetmath Ring
8 * @version 1.0
9 * @author Mark Hale
10 */
11 public interface Ring extends AbelianGroup {
12         /**
13         * Returns the unit element.
14         */
15         Member one();
16         /**
17         * Returns true if the member is the unit element.
18         */
19         boolean isOne(Member r);
20
21         /**
22         * This interface defines a member of a ring.
23         */
24         interface Member extends AbelianGroup.Member {
25                 /**
26                 * The multiplication law.
27                 * @param r a ring member
28                 */
29                 Member multiply(Member r);
30         }
31 }
32
33
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