near lemmas about derivation #7

Job	Run time
coq	40s
mathcomp-classical	2m 31s
mathcomp	42s
mathcomp-analysis-single	10m 34s
mathcomp-reals	2m 3s
mathcomp-reals-stdlib	1m 23s
mathcomp-experimental-reals	1m 46s
mathcomp-analysis	9m 14s
ssprove	16m 54s
mathcomp-analysis-stdlib	9m 21s
	55m 8s

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