Proofs and Concepts: The Fundamentals of Abstract Mathematics
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5.3 Give a two-column proof of the deduction
1.2 Suppose A and B are sets.
2.12 Suppose that p is a constant, but all other lower-case letters represent variables For each of the following, (a) does it have a free variable? (b) is it an assertion?
3.8 Which of the following English assertions are vacuously true (in the real world)?
1.27 Let n ∈ Z
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