Orthogonality Definition and 167 Threads

Page 152 Robinett: Consider the (non-normalized) even momentum space wavefunctions for the symmetric well:, \phi_n^+(p) = 2sin(w-m)/(w-m)+sin(w+m)/(w+m) where w = sin((n-1/2)pi) and m = ap/hbar. Show that \int_{-\infty}^{\infty}\phi_n^+(p)^*\cdot \phi_n^+(p) dp = \delta_{n,m} The hint...

Just a quick question. Suppose we are considering a (1+1) spacetime. Are all vector fields hypersurface orthogonal? I think the answer is yes, since in the formula \xi_{[a}\partial_b \xi_{c]}, two indices will always be the same, which I think automatically makes the expression equal to zero...

1: Why are the elements of a basis set taken to be orthogonal? But in real sense atomic orbitals do overlap.

1) If you have a particle in 1D bound within range "-a" and "a". You come up with one eigenfunction that is sinusoidal (since it satisfies the problem). Now, you get all the necessary constants through the usual way... I want to know whether more than one eigenfunction can be produced and...

Homework Statement show that 1s and 2s orbitals of H are orthogonal Homework Equations orbital functions n=1 and n=2 The Attempt at a Solution Im asking what values(range) should i integrate the two equations into. thank you

I know that the functions e^{2 \pi inx} for n \in \mathbb{Z} are a base in the space of functions whith period 1. How do I derive the orthogonality relations for these functions?

Problem: Show that \int_{-1}^{1} x P_n(x) P_m(x) dx = \frac{2(n+1)}{(2n+1)(2n+3)}\delta_{m,n+1} + \frac{2n}{(2n+1)(2n-1)}\delta_{m,n-1} I guess I should use orthogonality with the Legendre polynomials, but if I integrate by parts to get rid of the x my integral equals zero. Any tip on...

At the risk of arrousing the ire of the moderaters for posting the same topic in two forums, I again ask this question as no one in the quantum forum seems to be able to help. So... Regarding a proof of the orthogonality of eigenvectors corresponding to distinct eigenvalues of some Hermitian...

I'm not sure if this is the appropriate section, perhaps my question is better suited for Linear Algebra. At any rate, here goes. Regarding a proof of the orthogonality of eigenvectors corresponding to distinct eigenvalues of some Hermitian operator A: Given A|\phi_1\rangle = a_1|\phi_1\rangle...

I'm confused on the following questions. (1) Find a vector that is perpendicular to (v_1,v_2). (2) Find two vectors that are perpendicular to (v_1,v_2,v_3. This homework set was written by the professor (it is review) before we actually get into the new material. The notation the book uses is...

Hi, I'm trying to prove the orthogonality of associated Legendre polynomial which is called to "be easily proved": Let P_l^m(x) = (-1)^m(1-x^2)^{m/2} \frac{d^m} {dx^m} P_l(x) = \frac{(-1)^m}{2^l l!} (1-x^2)^{m/2} \frac {d^{l+m}} {dx^{l+m}} (x^2-1)^l And prove \int_{-1}^1...

This is a paragraph from a book, which I don't understand: "How many independent parameters are there in a 3x3 matrix? A real 3x3 matrix has 9 entries but if we have the orthogonality constraint, RR^T = 1 which corresponds to 6 independent equations because the product RR^T being the same...

For non-zero vectors v and w show that ||v||w + ||w||v is orthogonal to ||v||w - ||w||v I am baffled by this problem, I know that a way to solve it would be to say that the first dot the second = 0, but I am just unable to prove it for all cases from there. I know it is true though. Any...

In one of my homework problems we are asked to prove this: |X + Y|^2 + |X - Y|^2 = 2|X|^2 + 2|Y|^2 It seems quite simple: I just expanded both of them (cancelled 2(X dot Y) terms) and came up with the expression on the right. Is there something I am missing or is it really that simple...

How do you prove that the product of two orthogonal matrices is orthogonal? I know that a matrix can be written in component form as A=a_{jk} and that for an orthogonal matrix, the inverse equals the transpose so a_{kj}=(a^{-1})_{jk} and matrix multiplication can be expressed as...

We were doing examples in class today and showed that sin and cos were orthogonal functions. In general, is true that even and odd functions are orthogonal? I was unsure where a proof of this might begin, mostly how to generalize the notion of an even or odd function.

Hey, I've been trying to solve this problem it sounds simple but i don't know where to start: If \phi_{1} and \phi_{2} are normalised, have the same eigenvalue and obey \int \phi_{1}*\phi_{2}d\tau = c find the linear combination that is normalised and orthogonal to \phi_{1} Thanks