On Friday, June 14, 2019 at 8:16:58 PM UTC+9, Dima Pasechnik wrote:
>
> On Fri, Jun 14, 2019 at 12:04 PM Kwankyu Lee <ekwa...@gmail.com 
> <javascript:>> wrote: 
> > 
> > Hi 
> > 
> > I noticed that the coercion section of the sage reference manual 
> mentions _r_action_ and _l_action methods instead of _act_on_ and 
> _acted_upon_ methods, while it seems that the former methods were replaced 
> with the latter methods 10 years ago in #5597! 
> > 
> > Am I right? Then this is quite surprising. 
>
> quick grepping through src/sage/ shows that  _r_action_ is never 
> defined/used (only mentioned in commented out code 
> or in messages), and  _l_action is defined exactly once, in 
> src/sage/rings/multi_power_series_ring_element.py 
> and only used there, once. 
>
> So none of this is understood by any coersion/etc frameworks. 
>
> A documentation bug, I suppose (and probably a bug in 
> src/sage/rings/multi_power_series_ring_element.py, which uses 
> wrongly named stuff...) 
>

I agree.
 

> I've opened https://trac.sagemath.org/ticket/27989 to deal with it. 
>

Thank you.

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