Question

Non-degenarate subspace with indefinite inner product.

score 23 · Answer 1 · 2026-04-12 23:15:58

Non-degenarate subspace with indefinite inner product.

Published on 12 Apr 2026 - 23:15

score 42 · Answer 2 · 2026-04-16 19:26:27

How did we get $\left<u,e_1\right>\psi(e_1)+\dots+\left<u,e_n\right>\psi(e_n)=\left<u,\overline{\psi(e_1)}e_1+\dots+\overline{\psi(e_1)}e_1\right>$?

score 37 · Answer 3 · 2026-04-16 10:05:13

37

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score 157 · Answer 5 · 2026-04-12 03:26:01

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score 53 · Answer 6 · 2026-04-12 13:17:07

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score 211 · Answer 8 · 2026-04-12 22:03:24

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score 1k · Answer 15 · 2026-04-15 19:40:17

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Exercise 6.A.17 in "Linear Algebra Done Right 3rd Edition" by Sheldon Axler. I am worried if my solution is ok.

Published on 15 Apr 2026 - 19:40

List Question

Non-degenarate subspace with indefinite inner product.

How did we get $\left<u,e_1\right>\psi(e_1)+\dots+\left<u,e_n\right>\psi(e_n)=\left<u,\overline{\psi(e_1)}e_1+\dots+\overline{\psi(e_1)}e_1\right>$?

Contraction of a lightlike vector with another vector (free cordinate)

An identity of inner product

Finding a Kernel Matrix on $ \mathbb{R}^n$

Inner product with generating functions

Linear Algebra Done Right: why we define the inner product between two polynomials (of degree at most m) as $<p,q>=\int_{0}^1p(x)\bar{q}(x)dx$?

Orthogonal complement of kernel of linear functional has dimension n iff T surjective

How does this code Find the intersection point between two lines?

Finding the vertex of the parabola parameterized by $p(t)=P_0+P_1t+P_2t^2$ for vectors $P_0, P_1, P_2$

Finding Best approximation in space with standard inner product

What does the dot product of a tensor and a vector represent?

Convergence of a sub-sequence

Parallel vector and dot product

Exercise 6.A.17 in "Linear Algebra Done Right 3rd Edition" by Sheldon Axler. I am worried if my solution is ok.

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