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canh_dieu

Đăng ký: 26-12-2004
Offline Đăng nhập: 27-11-2009 - 12:28
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Chủ đề của tôi gửi

wonderful world

05-04-2008 - 23:59

Nghe được bài này trong phim "Witness" (1985, Harrison Ford). Thấy cũng vui vui.


Lyrics

Don't know much about history
Don't know much biology
Don't know much about a science book
Don't know much about the French I took

But I do know that I love you
And I know that if you love me too
What a wonderful world this would be

Don't know much about geography
Don't know much trigonometry
Don't know much about algebra
Don't know what a slide rule is for.

But I do know that one and one is two,
And if this one could be with you,
What a wonderful world this would be.

Now i don't claim to be an "A" student,
But I'm trying to be.
So maybe by being an "A" student baby
I can win your love for me.

Don't know much about history
Don't know much biology
Don't know much about a science book
Don't know much about the French I took.

But I do know that I love you,
And I know that if you love me too,
What a wonderful world this would be.

Latatatatatatahuwaah (history)
Oehwoewoe (biology)
Latatatatatatahuwaah (science book)
Oehwoewoe (French I took)

But I do know that I love you,
And I know that if you love me too,
What a wonderful world this would be.

Trường toán về Tự đẳng cấu đa thức

02-10-2006 - 08:49

Viện Toán học Hà Nội kết hợp với Trung tâm vật lý lý thuyết Quốc tế sẽ tổ chức một trường toán về các tự đẳng cấu đa thức và các vấn đề liên quan, từ ngày 9/10 cho đến 20/10/2006.

Như thường lệ, hội nghị phí là 100 USD tuy nhiên đối với các sinh viên trong nước thì khoản này chắc chắn sẽ được miễn. Những bạn nào yêu thích hình học affine và muốn tìm hiểu về giả thuyết Jacobi rất nên tham dự trường toán.

Dưới đây là thông báo chính thức của trường toán
-----------------------------------------------------------

The Institute of Mathematics, Hanoi, Vietnam, and the Abdus Salam International Centre for Theoretical Physics (ICTP), Trieste, Italy, are organizing a School and Workshop on Polynomial Automorphisms and Related Topics from October 9 to October 20, 2006, in Hanoi, Vietnam. The aim of the conference is to introduce mathematicians from the developing countries in Asian to recent developments in the field of Polynomial Automorphisms and its related topics in Commutative Algebra and Affine geometry and to promote collaboration between mathematicians from different developing and developed countries in this field.

Main Topics

Polynomial Automorphisms;
Jacobian Conjecture and Related topics: Group actions, locally nilpotent derivations, the Cancellation Problem, Linearization Conjectures, Embedding problem;
Topology of polynomials;
Global diffeomorphisms.

Organizers

Arno Van den Essen, Radboud University of Nijmegen, Netherlands.
David Wright, Washington University in St. Louis, USA.
Le Tuan Hoa, Institute of Mathematics, Vietnam.
Nguyen Van Chau, Institute of Mathematics, Vietnam.

Scientific committee

Hymann Bass, Michigan University,USA.
Sheeram Abhyankar, Purdue University, USA.
Arno Van den Essen, Radboud University of Nijmegen, Netherlands.
Le Dung Trang, ICTP, Italy.
Cesar Camacho, IMPA, Brazil.
David Wright, Washington University in St. Louis, USA.
Ha Huy Vui, Institute of Mathematics,Vietnam.
Ngo Viet Trung, Institute of Mathematics, Vietnam.
Ha Huy Khoai, Institute of Mathematics, Vietnam.
Nguyen Van Chau, Institute of Mathematics, Vietnam.

Scientific programs

1- Advanced School, October 9-13, 2006: There will be 5 instructional courses for graduate students and young mathematicians from the developing countries in Asian on the following topics:

Polynomial Automorphisms-David Wright, Washington University in St. Louis, USA.
The Jacobian conjecture-Arno Vanden Essen, Radboud University of Nijmegen, Netherlands.
Group Actions- Hanspeter Kraft, University of Basel, Switzerland.
Embedding Problems-Peter Rusell, McGill University, Canada.
Topology of Polynomials-Ha Huy Vui, Institute of Mathematics, Vietnam.

2- Workshop, October 16-20, 2006: This is devoted to an International Conference on recent developments in the field of Polynomial Automorphisms and its related topics in Commutative Algebra and Affine Geometry. Beside invited lectures and talks there will be opportunities for mathematicians to present their research works .

Participation

The school and the workshop are open to all mathematicians. Attending the Advanced School being would be optional. Registration form is obtainable from the website of the Institute of Mathematics, Hanoi, Vietnam.
Conference free: 100 USD.

Support

As a rule, travel and subsistence expenses of the participants should be borned by the home institutions. However, limited funds are available for some participants from and working in the developing countries in Asian . The application form is obtainable from http://agenda.ictp.t...it/smr.php?1788 .

Dealines:

Request for participation should be sent by E-mail or by ordinary post before June 9, 2006.

Application for support should be sent by E-mail or by ordinary post before May 9, 2006.

Contact Address

International School and Workshop
on Polynomial Automorphisms and Related topics
Dr. Nguyen van Chau
Institute of Mathematics
18 Hoang Quoc Viet
10307 Hanoi, Vietnam.
E-mail: [email protected] or [email protected]
Fax: 0084-4-7564303.

International School and Workshop
on Polynomial Automorphisms and Related topics
Abdus Salam International Centre for Theoretical Physics
Strada Costiera 11
34014 Trieste, Italy.
E-mail : [email protected]

Về chức năng của CTV3

15-08-2006 - 14:07

Đề nghị với Nhóm quản lý: Cho thêm nhóm CTV3 được điều hành box Du học-học bổng, và tha cho việc "dọn rác" ở Quán phim.

Giả thuyết Jacobi sai với số chiều 91?

03-04-2006 - 09:42

Một người bạn của một ông thầy ở trường cũ của mình có gửi email (cho các cộng sự) thông báo một tin "chấn động", rằng một anh chàng tên Michiel de Bondt đã tìm ra được một phản ví dụ cho giả thuyết Jacobi trong trường hợp số chiều bằng 91! Chưa biết đúng sai thế nào, nhưng có thể giới Toán học lại chuẩn bị có một đêm không ngủ.

Gần đây nhất có một chứng minh được đưa ra bởi Carolyn Dean (University of Michigan) cho trường hợp 2 chiều và đã gây được sự chú ý đặc biệt của giới Toán học, nhưng rất tiếc chứng minh đó lại sai. Câu chuyện đó đã được thảo luận tại http://diendantoanho...p?showtopic=424

Dưới đây là nội dung của email thông báo trên.

"Dear Friends,

Here some spectacular news:after his construction of a counterexample to the
Homogeneous Dependence problem in [1] Michiel de Bondt has now
constructed a counterexample to the Jacobian Conjecture in dimension 91 !!

His construction makes use of our reduction of the JC to the symmetric
case (in [2])
and the follow-up paper [3] by Wenhua Zhao , which reduces the problem
to a vanishing problem for the Laplace Operator.
To attack this Laplace operator formulation of the JC, he uses the
reduction to prime characteristic techniques, as exploited in the papers
[4] by Tsuchimoto, respectively [5] by Belov and Kontsevich,
respectively [6] by Adjamagbo and van den Essen. More precisely
he uses methods from P-adic Analysis in a clever way.

As a result he shows the existence of a counterexample in dimension 91 !!

His paper entitled: Laplace Inverse Reduction and P-adic Analysis 1: a
counterexample to the Jacobian Conjecture,

will appear on the ArXiv within a week.

References.

[1] M. de Bondt, Quasi-translations and counterexamples to the homogeneous
dependence problem, Report 0413 (September 2004), Radboud University
Nijmegen, to appear in Proc. of the AMS (2006).

[2] M. de Bondt and A. van den Essen, A reduction of the Jacobian
Conjecture to the symmetric case, Proc. of the AMS, 133 (2005), 2201-2205.

[3] W. Zhao, Hessian nilpotent formal power series and their deformed
inversion
pairs, Trans. Amer. Math. Soc. (to appear, or already appeared?)

[4] Y. Tsuchimoto, Osaka J. of Mathematics, Endomorphisms of Weylalgebra
and p-curvatures, Vol 42, No.2, 435-452 (June 2005).

[5] A. Belov and M. Kontsevich, The Jacobian Conjecture is Stably
equivalent to the Dixmier Conjecture, arXiv.org, math/0512171

[6] K. Adjamagbo and A. van den Essen, The equivalence of the Dixmier,
Jacobian
and Poisson Conjectures, to appear.



With the most friendly regards,

Arno van den Essen
."

Vanishing of a tensor product

20-12-2005 - 01:48

It is not difficult to see that =0. How about ?