[m-users.] Announcement: automatic differentiation in Mercury

[Richard O'Keefe]

Thank you for the links.  Especially the second.


On Mon, 23 Jan 2023 at 23:41, Tomas By <tomas at basun.net> wrote:

> On Mon, 23 Jan 2023 11:30:42 +0100, Richard O'Keefe wrote:
> > I'm familiar with dual numbers
> > https://en.wikipedia.org/wiki/Dual_number and have used them, but I
> > do not understand the extra parameter in this code and have no
> > idea what a 'tape' is.  Where is that described?
>
>
> https://en.wikipedia.org/wiki/Automatic_differentiation
>
> | a data structure known as a Wengert list (or "tape"),[3][4]
>
> 3. R.E. Wengert (1964). "A simple automatic derivative evaluation
>    program". Comm. ACM. 7 (8): 463–464. doi:10.1145/355586.364791. S2CID
>    24039274.
>
> 4. Bartholomew-Biggs, Michael; Brown, Steven; Christianson, Bruce;
>    Dixon, Laurence (2000). "Automatic differentiation of
>    algorithms". Journal of Computational and Applied Mathematics. 124
>    (1–2): 171–190. Bibcode:2000JCoAM.124..171B.
>    doi:10.1016/S0377-0427(00)00422-2. hdl:2299/3010.
>
> /Tomas
>
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