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From: Maxime Devos <maximedevos@telenet.be>
To: Blake Shaw <blake@sweatshoppe.org>
Cc: guix-devel@gnu.org
Subject: Re: how to write services (was: Re: Teams)
Date: Thu, 16 Jun 2022 00:28:34 +0200	[thread overview]
Message-ID: <d1a55c07f578fd61353e0b75beb1be3e7dc96c8e.camel@telenet.be> (raw)
In-Reply-To: <CAKjmbcA56WL8ude232fz_5_G9U2RfoNNf4gqMHu5tft5kMbjFQ@mail.gmail.com>

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Blake Shaw schreef op wo 15-06-2022 om 21:40 [+0000]:
> On the contrary, lets say I'm writing an intro book on CT. If I'm
> demonstrating something trivial, say the initial object, I'm not
> going to refer to it as "an initial-like object" for the sake of
> generality.

Neither does Guix?  If you're in a context where only the basic object
(in this case, your demonstration the initial object) is used, just
talk about the basic object.  But in a later section where you
generalize things to ‘initial-like objects’ (whatever that would be in
CT, I don't know any CT), you talk about ‘initial-like objects’, not
‘initial object and initial-like objects’.

For an example from another domain, consider groups in algebra.
In group theory, we have e.g. the fundamental theorem on homomorphisms.
Wikipedia formulates this as:

Given two groups G and H and a group homomorphism f : G → H, let K be a
normal subgroup in G and φ the natural surjective homomorphism G → G/K
(where G/K is the quotient group of G by K). If K is a subset of ker(f)
then there exists a unique homomorphism h: G/K → H such that f = h∘φ.

An equivalent statement could be made by replacing ‘given a group’ by
‘given an Abelian group or a group’:

Given two Abelian groups or groups G and H and a group homomorphism f :
G → H, let K be an Abelian normal subgroup or normal subgroup in G and
φ the natural surjective homomorphism G → G/K (where G/K is the
quotient group of G by K). If K is a subset of ker(f) then there exists
a unique homomorphism h: G/K → H such that f = h∘φ.’

But why do such a pointless thing, wouldn't just talking about groups
instead of ‘Abelian groups or groups’ be much simpler?

TBC: here ‘file-like object’ ≃ ‘group’ and ‘file’ = ‘Abelian group’.

Greetings,
Maxime.

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  parent reply	other threads:[~2022-06-15 22:29 UTC|newest]

Thread overview: 62+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-06-04 12:07 Teams Ricardo Wurmus
2022-06-04 13:00 ` Teams Maxime Devos
2022-06-04 13:19 ` Teams Ekaitz Zarraga
2022-06-04 14:50 ` Teams Tobias Geerinckx-Rice
2022-06-04 15:52   ` Teams Maxime Devos
2022-06-04 15:56   ` Teams david larsson
2022-06-05  9:10   ` Teams pelzflorian (Florian Pelz)
2022-06-07  4:11     ` Teams Thiago Jung Bauermann
2022-06-05  8:19 ` Teams Josselin Poiret
2022-06-06 21:21   ` Teams Ludovic Courtès
2022-06-14 11:31   ` Teams Andrew Tropin
2022-06-14 18:52     ` Teams Blake Shaw
2022-06-15  6:19       ` how to write services (was: Re: Teams) catonano
2022-06-15 13:53         ` Ricardo Wurmus
2022-06-15 17:01           ` Blake Shaw
2022-06-15 17:32             ` Maxime Devos
     [not found]               ` <CAKjmbcA56WL8ude232fz_5_G9U2RfoNNf4gqMHu5tft5kMbjFQ@mail.gmail.com>
2022-06-15 22:04                 ` Maxime Devos
2022-06-15 22:13                 ` Maxime Devos
2022-06-15 22:28                 ` Maxime Devos [this message]
2022-06-15 23:20                   ` Blake Shaw
2022-06-16  8:27                     ` Maxime Devos
2022-06-16  5:14             ` catonano
2022-06-16  6:46               ` Ricardo Wurmus
2022-06-16 13:09               ` Brian Cully via Development of GNU Guix and the GNU System distribution.
2022-06-18 11:53                 ` how to write services indieterminacy
2022-06-18 12:23                   ` Maxime Devos
2022-06-18 13:33                     ` indieterminacy
2022-06-15 10:53       ` How to write a service (was: Re: Teams) catonano
2022-06-05  9:31 ` Teams Lars-Dominik Braun
2022-06-05  9:51 ` Teams zimoun
2022-06-05 10:00   ` Teams Julien Lepiller
2022-06-07 17:49   ` Teams Efraim Flashner
2022-06-05  9:51 ` Teams Andreas Enge
2022-06-09  4:39   ` Teams Eric Bavier
2022-06-05 10:30 ` Teams indieterminacy
2022-06-05 17:59 ` Teams Mathieu Othacehe
2022-06-06 21:26   ` Teams Ludovic Courtès
2022-06-06 14:12 ` Teams Maxim Cournoyer
2022-06-07  0:28 ` Teams Ryan Prior
2022-06-07 19:06 ` Teams Vagrant Cascadian
2022-06-08 21:30   ` Teams Ludovic Courtès
2022-06-09  2:21     ` Teams Thiago Jung Bauermann
2022-06-09 19:28 ` Teams Arun Isaac
2022-06-13 13:38   ` Teams Blake Shaw
2022-06-13 22:33     ` Teams raingloom
2022-06-21 15:21 ` Teams: first draft list zimoun
2022-06-21 17:28   ` bokr
2022-06-21 22:21     ` zimoun
2022-06-22  6:56       ` Efraim Flashner
2022-06-22 16:19         ` bokr
2022-06-22  7:59   ` Ricardo Wurmus
2022-06-22  9:19     ` zimoun
2022-06-22 12:30       ` Josselin Poiret
2022-06-22 13:10         ` Maxime Devos
2022-06-22 13:49     ` Ludovic Courtès
2022-06-22 14:18       ` Blake Shaw
2022-07-01 10:28       ` Ricardo Wurmus
2022-07-01 17:36         ` Liliana Marie Prikler
2022-07-01 19:08           ` Ricardo Wurmus
2022-07-03 13:04             ` Teams: please add yourself to etc/teams.scm.in Ricardo Wurmus
2022-07-03 14:51               ` Andreas Enge
2022-07-01 20:53   ` Teams: first draft list Leo Famulari

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