On Thursday, December 21, 2017 at 3:19:57 AM UTC-8, vdelecroix wrote: > > While working on [1] I stumbled on a weird implementation of square root > for power series [2]. Namely, when extend=True it might just return a > formal element p so that p^2 is the initial series (example at [3]) > > As long as this only affects the behaviour when "extend=True" is specified I don't mind. I am very attached to R.<x> = QQ[[]] f = 1+x parent(f.sqrt()) == parent(f) so I wouldn't want that to break, or at least have an alternative for it.
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