List questions from orthogonality

Published on 25 Mar 2026 - 11:26

161

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Closed form of $ \int_{-1}^{1} \operatorname{erf}(x)^n \,dx $ for $ n$ is positive even integer

Published on 25 Mar 2026 - 9:49

2.5k

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Orthogonality Relations for $\sin kx$ and $\cos nx$ for arbitrary domains

Published on 03 Jun 2018 - 18:55

382

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Geometric Effect of Multiplying an Orthogonal Matrix by a Non-Zero Vector

Published on 24 Mar 2026 - 22:08

1.7k

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Proof of Inverse DFT

Published on 04 Jun 2018 - 12:01

65

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If v and w are orthogonal vectors and their images f(v), f(w) are orthogonal there exists an isometry we can build with a scalar $\alpha$

Published on 25 Mar 2026 - 3:04

237

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Prove that finite linear combination of $x^n$ is dense in $L^2 ([0,1]) $

Published on 05 Jun 2018 - 9:18

72

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Component of $x$ that is orthogonal to $y$?

Published on 07 Jun 2018 - 5:32

140

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Without Calculation, why is $Q^{-1}$ a Matrix of Rotation

Published on 25 Mar 2026 - 7:43

47

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Find the image of this Linear Transformation

Published on 10 Jun 2018 - 14:54

210

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orthogonal complement with integral as scalar product

Published on 10 Jun 2018 - 17:09

161

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$L_{1,1}$-norm and orthonormal matrices

Published on 25 Mar 2026 - 11:18

484

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Concerning the demonstration of $W_e^{\perp} = W_o$ over $V = C[-1,1]$.

Published on 12 Jun 2018 - 23:10

52

Views

Small confusion about two orthogonal projection on $L^2$.

Published on 13 Jun 2018 - 4:38

43

Views

orthogonality of two vectors

Published on 13 Jun 2018 - 5:33

List Question

Does a metric tensor imply the existence of orthonormal coordinates?

Closed form of $ \int_{-1}^{1} \operatorname{erf}(x)^n \,dx $ for $ n$ is positive even integer

Orthogonality Relations for $\sin kx$ and $\cos nx$ for arbitrary domains

Geometric Effect of Multiplying an Orthogonal Matrix by a Non-Zero Vector

Proof of Inverse DFT

If v and w are orthogonal vectors and their images f(v), f(w) are orthogonal there exists an isometry we can build with a scalar $\alpha$

Prove that finite linear combination of $x^n$ is dense in $L^2 ([0,1]) $

Component of $x$ that is orthogonal to $y$?

Without Calculation, why is $Q^{-1}$ a Matrix of Rotation

Find the image of this Linear Transformation

orthogonal complement with integral as scalar product

$L_{1,1}$-norm and orthonormal matrices

Concerning the demonstration of $W_e^{\perp} = W_o$ over $V = C[-1,1]$.

Small confusion about two orthogonal projection on $L^2$.

orthogonality of two vectors

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