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Subsemigroups of N   Message List  
Reply | Forward Message #236 of 654 |
Re: [univalg] Subsemigroups of N

Ahoj Venco a Jirko.
To je fakt legrace :-)).
P

Jiri Adamek wrote:
> Ahoj Venco,
> no to je legrace, zespolu komunikujeme takhle!!! Dostal jsem par odpovedi,
> jako ze uz to vedel Weierstrass..., ale kupodivu i konkretni clanek, kde
> to stoji, tak to mam radost.
> Cau, Jirka
>
> xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
> alternative e-mail address (in case reply key does not work):
> J.Adamek@...
> xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx



Tue Oct 12, 2004 10:21 am

payinek
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Message #236 of 654 |
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Where do I find a proof that every subsemigroup of the additive group of all natural numbers is finitely generated? ...
Jiri Adamek
adamek@...
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Oct 8, 2004
1:53 pm

Hi, I guess that some elementary number theory texts have this; I'm not sure. I published a paper in JSL around 1971 (vol. 36) showing that the first order...
Mckenzie, Ralph N
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Oct 8, 2004
2:53 pm

Dear Ralph, I think I will send you some math questions over the holidays, when I read what JB sent us. Now, I just wonder if you (or a secretary) sent me any ...
Kira Adaricheva
ki13ra@...
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Nov 24, 2004
7:07 am

This fact goes back to Frobenius (and Weierstrass). The problem is to recall who and where mentioned it in print. This is more difficult than just proving the...
Boris M Schein
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Oct 8, 2004
3:33 pm

... You can also prove it using partial algebras. Starting from relative partial subsemigroups of N. The main construction is in a paper due to Mikenberg, I...
A. Mani
a_mani_amc
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Oct 8, 2004
9:31 pm

Obavam se Jirko, ze s nalezenim tohoto faktu budes mit problemy. Je to folklor, takze se da ocekavat v nejake zakladni ucebnici algebry. Ale moc bych neveril...
Vaclav Koubek
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Oct 11, 2004
9:02 am

Ahoj Venco, no to je legrace, zespolu komunikujeme takhle!!! Dostal jsem par odpovedi, jako ze uz to vedel Weierstrass..., ale kupodivu i konkretni clanek, kde...
Jiri Adamek
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Oct 12, 2004
9:18 am

Ahoj Venco a Jirko. To je fakt legrace :-)). P...
Pavel Jiranek
payinek
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Oct 12, 2004
10:21 am

... Sorry, my previous reaction was too vague (laziness, common laziness...) There was a reference to related results (provided by Melvin Henriksen). The Redei...
Boris M Schein
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Oct 12, 2004
10:16 pm

A comment to my previous comments. I asked a friend who was interested in the subsemigroups of free commutative monoids. He is far from home and cannot look up...
Boris M Schein
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Oct 13, 2004
3:28 pm
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