Comments on: Infinite fields, finite fields, and the Ax-Grothendieck theorem
https://terrytao.wordpress.com/2009/03/07/infinite-fields-finite-fields-and-the-ax-grothendieck-theorem/
Updates on my research and expository papers, discussion of open problems, and other maths-related topics. By Terence TaoFri, 27 Nov 2015 03:20:54 +0000hourly1http://wordpress.com/By: Théorème d’Ax-Grothendieck | Huhuw's Blog
https://terrytao.wordpress.com/2009/03/07/infinite-fields-finite-fields-and-the-ax-grothendieck-theorem/comment-page-1/#comment-451452
Wed, 04 Feb 2015 14:07:27 +0000http://terrytao.wordpress.com/?p=1869#comment-451452[…] https://terrytao.wordpress.com/2009/03/07/infinite-fields-finite-fields-and-the-ax-grothendieck-theo… […]
]]>By: Koushik Ghosh
https://terrytao.wordpress.com/2009/03/07/infinite-fields-finite-fields-and-the-ax-grothendieck-theorem/comment-page-1/#comment-246487
Thu, 26 Sep 2013 17:41:50 +0000http://terrytao.wordpress.com/?p=1869#comment-246487The jacobian conjecture gets reduced to asking injectivity of polynomial map from the rudin’s theorem if the jacobian is a nonzero constant.So,I am asking if the same holds if polynomials are replaced by holomorphic.
]]>By: Koushik Ghosh
https://terrytao.wordpress.com/2009/03/07/infinite-fields-finite-fields-and-the-ax-grothendieck-theorem/comment-page-1/#comment-246486
Thu, 26 Sep 2013 17:36:19 +0000http://terrytao.wordpress.com/?p=1869#comment-246486Is there some counterexample for the following “weaker jacobian conjecture for holomorphic functions” replace polynomials with holomorphic functions and instead of asking for invertibility asking just injectivity of the holomorphic map if the jacobian does not vanish or is a non-zero constant
]]>By: TH
https://terrytao.wordpress.com/2009/03/07/infinite-fields-finite-fields-and-the-ax-grothendieck-theorem/comment-page-1/#comment-225710
Tue, 23 Apr 2013 21:32:23 +0000http://terrytao.wordpress.com/?p=1869#comment-225710Hello there,
it seems to me that you have to consider polynomial maps (i.e. n-tuples of polynomials) instead of just polynomials, as you do. Then the equations coming from the Nullstellensatz have to be adapted accordingly (which is not hard), etc.
Best regards –
]]>By: The closed graph theorem in various categories « What’s new
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Wed, 21 Nov 2012 02:31:09 +0000http://terrytao.wordpress.com/?p=1869#comment-194635[…] several complex variables, it is a classical theorem (see e.g. Lemma 4 of this blog post) that a holomorphic function from a domain in to is locally injective if and only if it is a […]
]]>By: Definable subsets over (nonstandard) finite fields, and almost quantifier elimination « What’s new
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Wed, 12 Sep 2012 23:36:40 +0000http://terrytao.wordpress.com/?p=1869#comment-169851[…] first studied systematically by Ax (in the same paper where the Ax-Grothendieck theorem, discussed previously on this blog, was established), with important further contributions by Kiefe, by Fried-Sacerdote by Cherlin-van […]
]]>By: More On Coloring The Plane « Gödel’s Lost Letter and P=NP
https://terrytao.wordpress.com/2009/03/07/infinite-fields-finite-fields-and-the-ax-grothendieck-theorem/comment-page-1/#comment-52969
Sun, 22 May 2011 17:12:54 +0000http://terrytao.wordpress.com/?p=1869#comment-52969[…] A powerful meta-principle that I have discussed before is the close connection between questions about complex numbers and finite fields. For a much better explanation than I could give, please see the discussion a while ago by Terence Tao here. […]
]]>By: Random
https://terrytao.wordpress.com/2009/03/07/infinite-fields-finite-fields-and-the-ax-grothendieck-theorem/comment-page-1/#comment-50592
Sun, 06 Mar 2011 03:49:36 +0000http://terrytao.wordpress.com/?p=1869#comment-50592Minor correction: in the proof of Corollary 5, z should be mapped to a random vector in C^n, not a random complex number.

[Corrected, thanks – T.]

]]>By: Jacobian conjecture « Simple or not simple?
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Sun, 24 Jan 2010 13:05:57 +0000http://terrytao.wordpress.com/?p=1869#comment-43359[…] Tao, Terence (2009-03-07). “Infinite fields, finite fields, and the Ax-Grothendieck theorem”. What’s New. […]
]]>By: Terence Tao
https://terrytao.wordpress.com/2009/03/07/infinite-fields-finite-fields-and-the-ax-grothendieck-theorem/comment-page-1/#comment-42789
Fri, 11 Dec 2009 21:15:09 +0000http://terrytao.wordpress.com/?p=1869#comment-42789Ah yes, that would work too :-)
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