Posted by Xixi
on September 30, 2007, 2:06 pm
I'm kinda confused, c'z I think 'generated by' is defined when {C} is a base, here {C} doesn't look like a base, because the \any c1,c2 \in {C}, there may not be a c3, and c3 included in the intersection of c1 and c2.
Which step am I wrong?
Thanks, Prof Holmer
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