Theorem imnegi

Description: Imaginary part of negative. (Contributed by NM, 2-Aug-1999)

	Ref	Expression
Hypothesis	recl.1	|- A e. CC
Assertion	imnegi	|- ( Im ` -u A ) = -u ( Im ` A )

Proof

Step	Hyp	Ref	Expression
1		recl.1	|- A e. CC
2		imneg	|- ( A e. CC -> ( Im ` -u A ) = -u ( Im ` A ) )
3	1 2	ax-mp	|- ( Im ` -u A ) = -u ( Im ` A )