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>> No.10555129 [View]
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10555129

>>10555106
I define C so that "z" is in C if and only if "x" and "y" are in R and

z = x + iy

This is the usual definition of C that appears in the first chapter of every complex analysis book that has ever been written. I have proven that (inf - b) is in R, and it is obvious that y0 is in R.

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