Tue, 09 Nov 2021 19:47:24 +0100 nipkow merged
Tue, 09 Nov 2021 16:17:13 +0100 nipkow tuned attributes to avoid looping
Mon, 08 Nov 2021 19:56:15 +0100 nipkow added eq_iff_swap for creating symmetric variants of thms; applied it in List.
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