Set theory: is {phi} a subset of {{phi}} ?

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chandu

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REGARDING SET THEORY

is {phi} a subset of {{phi}}

nd why? help me out plz
 

REGARDING SET THEORY

The elements in {phi} are phi and {{phi}} does not contain the element phi, it contains the set containing phi, which is a beast of a different type.
 

Re: REGARDING SET THEORY

ya got the point thanx cing now it looks silly question. oh noo what i have thought ?
 

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