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# Exercise 7.2.16 Use the dimension theorem to prove Theorem 1.3.1: If A is an m x...

Exercise 7.2.16 Use the dimension theorem to prove Theorem 1.3.1: If A is an m x n matrix with m <n, the system Ax = 0 of m homogeneous equations in n vari- ables always has a nontrivial solution.

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