Variations on the Closure of a Set.

Francis, Richard L.

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ERIC Number: EJ116658

Record Type: CIJE

Publication Date: 1975

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Variations on the Closure of a Set

Francis, Richard L.

Mathematics Teacher, 68, 4, 277-281, Apr 75

The author observes that checking the closure property is redundant for most number systems and therefore hard for students to understand. He defines several systems which are not closed, develops two concepts related to closure, and provides many related examples. (SD)

Descriptors: Algebra, Deduction, Instruction, Integers, Mathematical Concepts, Number Concepts, Number Systems, Problem Solving, Secondary Education, Secondary School Mathematics

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