experimental: Gröbner Walk #15907

Job	Run time
doctest (1.10, ubuntu-latest)	24m 54s
doctest (1.11-nightly, ubuntu-latest)	25m 1s
test (1.6, short, ubuntu-latest)	1h 10m 37s
doctest (nightly, ubuntu-latest)	26m 2s
test (1.6, long, ubuntu-latest)	53m 23s
doctest (1.10, ubuntu-latest, depwarn=error)	25m 51s
test (1.10, short, ubuntu-latest)	54m 9s
doctest (1.10, macOS, RPTU)	12m 3s
test (1.10, long, ubuntu-latest)	44m 52s
test (1.11-nightly, short, ubuntu-latest)	1h 3m 14s
test (1.11-nightly, long, ubuntu-latest)	53m 47s
test (nightly, short, ubuntu-latest)	1h 4m 16s
test (nightly, long, ubuntu-latest)	50m 19s
test (1.10, short, ubuntu-latest, depwarn=error)	52m 46s
test (1.10, long, ubuntu-latest, depwarn=error)	43m 27s
test (1.10, short, macOS, RPTU)	12m 3s
test (1.10, long, macOS, RPTU)	13m 27s
test (1.10, book, ubuntu-latest)	55m 47s
	12h 25m 58s

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