[isabelle-dev] quaternions

[Lawrence Paulson]

The cross product development is 200 lines long while the quaternion development is 730. Should they be separate entries, or do cross products belong elsewhere?
Larry

> On 18 Jun 2018, at 13:18, Tobias Nipkow <nipkow at in.tum.de> wrote:
> 
> Why not simply the AFP?

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