Riemann Definition and 618 Threads

Georg Friedrich Bernhard Riemann (German: [ˈɡeːɔʁk ˈfʁiːdʁɪç ˈbɛʁnhaʁt ˈʁiːman] (listen); 17 September 1826 – 20 July 1866) was a German mathematician who made contributions to analysis, number theory, and differential geometry.
In the field of real analysis, he is mostly known for the first rigorous formulation of the integral, the Riemann integral, and his work on Fourier series. His contributions to complex analysis include most notably the introduction of Riemann surfaces, breaking new ground in a natural, geometric treatment of complex analysis.
His famous 1859 paper on the prime-counting function, containing the original statement of the Riemann hypothesis, is regarded as one of the most influential papers in analytic number theory.
Through his pioneering contributions to differential geometry, Riemann laid the foundations of the mathematics of general relativity. He is considered by many to be one of the greatest mathematicians of all time.

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  1. T

    How to Prove Log 2 Using Riemann Sums?

    I have been working on this problem for a while. I am supposed to prove that log 2 = \lim_{n \rightarrow \infty} \frac{1}{n+1} + \frac{1}{n+2} + ... + \frac{1}{2^n}. The problem is that I have a hard time figuring out how I am supposed to prove that something is equal to a transcendental...
  2. S

    What is the proof of riemann integral?

    so riemann integral pretty much says that if you take closer and closer approximations, then you can find the area of whatever(not too precise, I know, but doing the rectangles and stuff). I'm looking for a proof of it, but all I can find are more general things, i.e, Riemann integeral is...
  3. G

    How to Approximate the Area of a Semi-Circle Using Riemann Sums

    Can anyone please direct me in the right way on working out the approximate area of a semi-circle with equation y = (r^2 - x^2)^0.5, by using a Riemann Sum
  4. M

    Robustness of the Riemann integral

    Could someone explain me what robustness is(in ur words), and how it works in proofs. All i kno is that basically u have two functions and u jiggle them a lot until u make them integrable if its not or destroy their integrability if they are integrable. Geometric explanation would really help...
  5. K

    Understanding Riemann Sums: Solving Lf(P) and Uf(P) Correctly

    When calculating Lf(P) and Uf(P) there can be many different answers correct? Provided that you solved it properly.
  6. W

    Riemann curvature tensor derivation

    Hey, when calculating the Riemann curvature tensor, you need to calculate the commutator of some vector field V , ie like this :- [\bigtriangledown_a, \bigtriangledown_b] = \bigtriangledown_a\bigtriangledown_b - \bigtriangledown_b\bigtriangledown_a = V;_a_b - V;_b_a But...
  7. C

    De Branges and the Riemann Hypothesis

    In June of this year the mathematician Louis de Branges published in Internet a proposed "proof" of the Riemann Hypothesis. The page is: http://www.math.purdue.edu/~branges/riemannzeta.pdf Years ago De Branges proved the Bieberbach Conjecture. He has tried several times to proof the RH...
  8. T

    How Do You Describe the Riemann Surface of w=z-sqrt(z^2-1)?

    So I'm supposed to describe the riemann surface of the following map: w=z-\sqrt{z^2-1} I can sort of understand the basic idea and derivation behind the riemann surfaces of w=e^z and w=\sqrt{z}, but ask me a question about another mapping, and I really don't know where to begin. How does one...
  9. E

    Cauchy Riemann Conditions Question

    Ok, I am told in a complex analysis book that the gradient squared of u is equal to the gradient squared of v which is equal to 0. We know the derivate of w exists, and w(z)=u(x,y) + iv(x,y) Thus the Cauchy Riemann conditions must hold. (When I use d assume that it refers to a partial...
  10. S

    Simple Riemann Sums question with answers not lining up

    Please tell me if I am doing the summation of rectangular areas wrongly. Using summation of rectangles, find the area enclosed between the curve y = 3x^2 and the x-axis from x = 1 to x = 4. Now, before I answer the way it asks, I want to use antidifferentiation first to see what I should...
  11. Z

    Where Can I Find a Simpler Proof of the Riemann Mapping Theorem?

    I'm looking for a proof of the Riemann mapping theorem. If I'm not mistaking, there are differnet proofs and the original proof is quite difficult. I'd appreciate any information on where I can/might find a less complicated proof of this theorem.
  12. E

    Is the Limit of Riemann Function Product Non-Zero or Finite?

    let be the product R(s)R(s+a) with a a complex or real number..the i would like to know the limit Lim(s tends to e) being e a number so R(e)=0 ¿is there a number a so the limit is non-zero nor infinite?..thanks.
  13. M

    How are the Riemann tensor of curvature and the Hamilton operator connected?

    Does someone here knows something about how tensor of curvature (Riemann) and the hamilton operator associated with a particle are connected ? Makes this question sense ? Thanks
  14. A

    Gauge Groups, Riemann Tensors & Conformal Invariance in GR & QG

    In trying to get my head round GR and quantum gravity, I'm puzzled about the following questions: Is the gauge group for gravity defined as the group of all possible Weyl tensors on a general 4D Riemann manifold? How is this group defined in matrix algebra? Is it a subgroup of GL(4). How do...
  15. I

    Riemann Hypothesis: Will it Ever be Proven?

    Just an opinion question, do you think that the riemann hypothesis will ever be proven? If so, how long do you think it will take?
  16. D

    Proving Riemann Integral: m(b-a)<=int[f(x).dx]<=M(b-a)

    Hi there, I have a problem and I was wondering if anyone can help me this one. Q)Suppose f:[a,b]->R is (Riemann) integrable and satisfies m<=f(x)<=M for all element x is a member of set [a,b]. Prove from the defintion of the Riemann integral that m(b-a)<=int[f(x).dx]<=M(b-a). where the...
  17. D

    Can anyone help with finding the Riemann sum for f(x)=x^3?

    Hello there, can anyone help me here as I'm finding it difficult to tackle this question. Consider f(x)=x^3 on the interval [1,5]. Find the Riemann sum for the equipartition P=(1,2,3,4,5) into 4 intervals with x_i^* being the right-hand endpoints (ie. x_i=a+hi) Then find a formula for the...
  18. T

    Riemann Hypothesis: What Is It? Online Resources

    What is the Riemann Hypothesis? Where can I find good online literature upon the subject?:smile:
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