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Question: How to take all possible unions

Question:How to take all possible unions

Athar Kharal 85 Maple
union set
May 19 2013
1

I have a set of sets named T. How I can take all possible unions of the members of T and if the result is not in T already, include it in T. I want to do this using a seq command, but could not do. Can anyone help? This is so to say, T is to be made closed under union.
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