“When did they start putting letters in it?” Below are the some definitions in Modern Algebra that we will use to prove the statement: “Let ☆ be defined on 2ℤ={2n|n∈ℤ} by a ☆ b = a + b. Prove that ⟨ℤ,☆⟩ is a group.” These definitions are assumed to be true and never false. Take your time […]
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