Prove that every set D ⊆ ℕ that is definable in N := (ℕ, 0, S , +, ·) is actually ∅-definable.
Prove that every set D ⊆ ℕ that is definable in N := (ℕ, 0, S , +, ·) is actually ∅-definable.
Chapter9: Sequences, Probability And Counting Theory
Section9.5: Counting Principles
Problem 38SE: Suppose a set A has 2,048 subsets. How many distinct objects are contained in A?
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Prove that every set D ⊆ ℕ that is definable in N := (ℕ, 0, S , +, ·) is actually ∅-definable.
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