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data structure for sets

• To: mathgroup at smc.vnet.net
• Subject: [mg35566] data structure for sets
• From: nachbar at merck.com (Robert B. Nachbar)
• Date: Fri, 19 Jul 2002 06:08:30 -0400 (EDT)
• Sender: owner-wri-mathgroup at wolfram.com

Has anyone implemented a data structure for sets that has the
Attribute Orderless and automatically deletes duplicate elements or
else ignores them when using Equal or SameQ? Functions such as SubsetQ
and SubsetEqualQ would also be helpful.

Thanks,

Bob