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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next prev 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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