Một số kết quả đáng quan tâm


Chuỗi Fourier



Xem thêm trong cuốn sách về lý thuyết xấp xỉ trên thư viện.




distance between sets in a metric space



Showing the distance between sets is indeed a metric.







Lemma 2.10. The number of positive eigenvalues of a real symmetric matrix
equals the number of sign changes in the coefficient sequence of its characteristic polynomial.

Cite from  page 28 Solving Systems of Polynomial Equations, Bernd Sturmfels




Vấn đề nội suy





Linh tinh

A system is a big black box
Of which we can’t unlock the locks,
And all we can find out about
Is what goes in and what comes out.
—Kenneth Boulding


2 Responses to “Một số kết quả đáng quan tâm”

  1. vanchanh123 Says:

    Chúng ta thử liên tưởng kết quả trên với qui tắc dấu Descart?

  2. vanchanh123 Says:

    Thêm 1 kết quả về điểm bất động:
    Perov’s fixed point theorem http://www.mathvn.org/forum/viewthread.php?thread_id=1135&pid=4851

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