> Am 18.01.2018 um 14:36 schrieb Tobias Nipkow <nip...@in.tum.de>: > > > > On 18/01/2018 11:06, Fabian Immler wrote: >>> Am 18.01.2018 um 08:32 schrieb Tobias Nipkow <nip...@in.tum.de>: >>> >>> 1. Library/Complement contains both new generic material like "t3_space" >>> but also new concepts like [mono_intros] for more automation in proving of >>> inequalities. In short, there is a wealth of material that might be >>> suitable for inclusion in HOL-Analysis. >>> I have already made a start by moving a few [simp] rules but that is it >>> from me because I am not familiar enough with the Analysis material. >> Most of this looks like it could go to HOL-Analysis. >>> 2. Hausdorff_Dinstance, Metric_Completion and Isometries stronly smell of >>> generic concepts that should go somewhere else. >>> We need a discussion on whether any of the theories deserve a separate AFP >>> entry. >> In my opinion, Hausdorff_Distance and Metric_Completion are general enough >> to put them to HOL-Analysis. >> (They are also relatively short, so I am not sure if it is worth to create >> separate AFP entries.) >> The theory Isometries contains Lipschitz maps, isometries, geodesic spaces, >> and quasi-isometries. >> The very same definition of Lipschitz maps is also in >> AFP/Ordinary_Differential_Equations, so I take this as a strong indication >> to move Lipschitz maps to HOL-Analysis. Isometries also seem like a >> generically useful concept and could go to HOL-Analysis. > > A lot of things are useful, but Isometries.thy is large and would also make a > nice AFP entry. With "Isometries" I meant the part of Isometries.thy that introduces isometry_on (this is only 150 lines). Lipschitz maps are another 350 lines. The rest of Isometries.thy seems to be about geodesic spaces and quasi-isometries could indeed make a separate AFP entry.
Fabian >> My impression is that geodesic spaces and quasi-isometries are more >> specialised concepts (but that might also be just because I have never come >> across them up to now...). I have no real opinion on what to do with them. >> We do not have a precise specification of what HOL-Analysis is or should be. >> I think that makes it very hard to draw a line between material that should >> go to HOL-Analysis and what should remain in the AFP. So take this as just >> my personal view. >> Fabian > > _______________________________________________ > isabelle-dev mailing list > isabelle-...@in.tum.de > https://mailmanbroy.informatik.tu-muenchen.de/mailman/listinfo/isabelle-dev
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