self intersection via adjunction #81

Job	Run time
doctest (1.10, ubuntu-latest)	26m 31s
doctest (1.11-nightly, ubuntu-latest)	31m 31s
test (1.6, short, ubuntu-latest)	1h 24m 55s
test (1.6, long, ubuntu-latest)	1h 3m 46s
doctest (nightly, ubuntu-latest)	32m 29s
test (1.10, short, ubuntu-latest)	1h 10m 57s
doctest (1.10, ubuntu-latest, depwarn=error)	26m 54s
test (1.10, long, ubuntu-latest)	46m 17s
doctest (1.10, macOS, RPTU)	1s
test (1.11-nightly, short, ubuntu-latest)	1h 24m 16s
test (1.11-nightly, long, ubuntu-latest)	55m 25s
test (nightly, short, ubuntu-latest)	1h 27m 10s
test (nightly, long, ubuntu-latest)	56m 52s
test (1.10, short, ubuntu-latest, depwarn=error)	1h 8m 14s
test (1.10, long, ubuntu-latest, depwarn=error)	46m 55s
test (1.10, short, macOS, RPTU)	1s
test (1.10, long, macOS, RPTU)	1s
test (1.10, book, ubuntu-latest)	50m 0s
test (nightly, book, ubuntu-latest)	1h 7m 20s
	14h 59m 35s

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