1. This formula is known as the symmetric difference quotient. 2. A difference, symmetric difference , and subset testing. 3. For, let, where denotes the symmetric difference . 4. Sometimes the Boolean group is actually defined as the symmetric difference operation on a set. 5. Those remaining octads are subsets of W 21 and are symmetric differences of pairs of lines. 6. The expression under the limit is sometimes called the "'symmetric difference quotient " '. 7. The symmetric difference can also be expressed using the predicates describing the two sets in set-builder notation: 8. A symmetric difference overlay defines an output area that includes the total area of both inputs except for the overlapping area. 9. The symmetric difference is associative ( and consequently the leftmost set of parentheses in the previous expression were thus redundant ): 10. I would use " symmetric difference of two concentric balls " . talk ) 00 : 59, 27 July 2008 ( UTC)
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