Triangle, Parallelogram, and Trapezoid Orders
نویسندگان
چکیده
In his 1998 paper, Ryan classified the sets of unit, proper, and plain trapezoid and parallelogram orders. We extend this classification to include unit, proper, and plain triangle orders. We prove that there are 20 combinations of these properties that give rise to distinct classes of ordered sets, and order these classes by containment. Mathematics Subject Classifications (2000) 06A06, 05C62
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ورودعنوان ژورنال:
- Order
دوره 27 شماره
صفحات -
تاریخ انتشار 2010