Question: For a universe U and sets A, B U, prove that a) A B = B A b) c) d) A

For a universe U and sets A, B Š‚ U, prove that
a) A ˆ† B = B ˆ† A
b)
A A A = U

c)

For a universe U and sets A, B Š‚ U,

d) A ˆ† θ = A, so θ is the identity for A, as well as for U

A A A = U

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