Re: #matr~ vs ##matr (and: arity, questenian and !!)

Ilya Zakharevich on Fri, 15 Dec 2023 09:18:14 +0100

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Re: #matr~ vs ##matr (and: arity, questenian and !!)

To: pari-dev@pari.math.u-bordeaux.fr
Subject: Re: #matr~ vs ##matr (and: arity, questenian and !!)
From: Ilya Zakharevich <nospam-abuse@ilyaz.org>
Date: Fri, 15 Dec 2023 00:18:08 -0800
Delivery-date: Fri, 15 Dec 2023 09:18:14 +0100
In-reply-to: <ZWphDpDvEL3Es0H3@seventeen>
References: <20210205134643.ihupkp7klxab4cxb@math.berkeley.edu> <20210205135448.rm5xdgmlsfjmty3z@math.berkeley.edu> <ZWQRkHqLoM9M3tN2@login.math.berkeley.edu> <ZWpVXFjgTIRCX8QZ@login.math.berkeley.edu> <ZWphDpDvEL3Es0H3@seventeen>

On Fri, Dec 01, 2023 at 11:41:18PM +0100, Bill Allombert wrote:
> On Fri, Dec 01, 2023 at 01:51:24PM -0800, Ilya Zakharevich wrote:
> > >   ##object  return “the arity” of the object: 2/1/0 for matrices/vectors/scalars 
> > >   	    (and maybe -1 for the “tricky” cases, when/if an object may
> > >   	     be used as a scalar AND as a vector/matrix/etc.).
> 
> How would you use this data ?

E.g, to rewrite exp().  I need to distribute through elements.

Thanks,
Ilya

References:
- Re: #matr~ vs ##matr (and: arity, questenian and !!)
  - From: Ilya Zakharevich <nospam-abuse@ilyaz.org>
- Re: #matr~ vs ##matr (and: arity, questenian and !!)
  - From: Bill Allombert <Bill.Allombert@math.u-bordeaux.fr>

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