Proving every creative set is in some simple set

[iamwanli]

In Cooper's book, I can't think out the solution of the following exercise.

Show that each creative set is contained in some simple set.



By the way,they are not homework question.

I read the book on my own and I am a beginner. Thanks for your hint.

 

[chiro]

Hey iamwanli and welcome to the forums.

What is a 'creative set'? Can you define that for us?