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at 5:15, why are all c equal to 0?
Because if you write out the entries of the vector c1*e1 + ... + cn*en, you get (c1,c2,...,cn). The only way that can equal the 0 vector is if all c's are equal to 0.
at 5:15, why are all c equal to 0?
Because if you write out the entries of the vector c1*e1 + ... + cn*en, you get (c1,c2,...,cn). The only way that can equal the 0 vector is if all c's are equal to 0.