#11995: Length argument for PARI Vec()
---------------------------+------------------------------------------------
   Reporter:  jdemeyer     |          Owner:  was                               
 
       Type:  enhancement  |         Status:  needs_review                      
 
   Priority:  major        |      Milestone:  sage-4.8                          
 
  Component:  interfaces   |       Keywords:  PARI Vec Vecrev Vecsmall Col 
Colrev
Work_issues:               |       Upstream:  N/A                               
 
   Reviewer:               |         Author:  Jeroen Demeyer                    
 
     Merged:               |   Dependencies:  #11130, #11890                    
 
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Description changed by jdemeyer:

Old description:

> Upstream PARI has extended the `Vec()`, `Vecrev()`,  `Vecsmall()`,
> `Col()` functions to allow an optional argument giving a minimum length.
> The PARI currently in Sage does not support this, but we can easily
> emulate it in the Sage library.
>
> Also, to minimize surprises, we should probably implement `Vecrev()` as
> is currently done in PARI, instead of having our own `Vecrev()`.  For
> most Sage applications, `.list()` should be used anyway instead of
> `.Vecrev()`.

New description:

 Upstream PARI has extended the `Vec()`, `Vecrev()`,  `Vecsmall()`, `Col()`
 functions to allow an optional argument giving a minimum length.  The PARI
 currently in Sage does not support this, but we can easily emulate it in
 the Sage library.

 Also, to minimize surprises, we should implement `Vecrev()` using the PARI
 library function, instead of having our own `Vecrev()`.  For most Sage
 applications, `.list()` should be used anyway instead of `.Vecrev()`.

--

-- 
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/11995#comment:8>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica, 
and MATLAB

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