Question
Tue April 20, 2010 By: Sidharth Acharya

Explain Universal set and { },which is a null set.Sir does {phi} exist?

Expert Reply
Tue April 20, 2010

   the empty set is denoted with  greek alphabet (pronounced as phi).it's the subset of every set.

{phi} does not indicate the empty set,it's just a set containing the element phi(the word)

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