The multiplication table will not occur in this book, not even the theorem,2 \cdot 2 = 4,but I would recommend, as an exercise, that you define2 = 1 + 1,
4 = (((1 + 1) + 1) + 1)and then prove the theorem. (Edmund Landau)

The multiplication table will not occur in this book, not even the theorem,2 \cdot 2 = 4,but I would recommend, as an exercise, that you define2 = 1 + 1, 4 = (((1 + 1) + 1) + 1)and then prove the theorem.

Edmund Landau

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book exercise multiplication prove table theorem

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