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$\begingroup$ Thanks! The definition of add_two_and_a_half still doesn't go through -- "The term "2" has type "nat" while it is expected to have type "GRing.Zmodule.sort ?V"." $\endgroup$
– BallBoy
Commented Jul 13, 2022 at 20:43
$\begingroup$ Ah, perhaps you don't have a recent enough version of mathcomp & rest... $\endgroup$
– Julien Puydt
Commented Jul 14, 2022 at 8:07
$\begingroup$ Could be! I just installed a couple weeks ago so I thought my version was newest... but perhaps not... $\endgroup$
– BallBoy
Commented Jul 14, 2022 at 15:59
$\begingroup$ My mathcomp is 1.15.0, mathcomp-analysis 0.5.2 and mathcomp-algebra-tactics is 1.0.0. $\endgroup$
– Julien Puydt
Commented Jul 14, 2022 at 16:41
$\begingroup$ Update: upgraded and this worked! Thank you! $\endgroup$
– BallBoy
Commented Jul 20, 2022 at 16:23

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