History of I

	Revision 11 . . August 6, 2001 9:01 pm by AxelBoldt [add imaginary unit]
	Revision 10 . . (edit) August 6, 2001 8:02 pm by Andre Engels

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Difference (from prior major revision) (no other diffs)

Added: 5a6,7

4. In mathematics, the letter i is used for the imaginary unit, a complex number whose square is -1.