List questions from projection

Published on 29 Mar 2026 - 14:18

576

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Prove that if $P_i^2=P_i$ and $P_1+...+P_k=I$, then $E=\bigoplus_k \mathrm{Im}(P_k)$ and $P_i P_j=0$ if $i\neq j$

Published on 22 Sep 2017 - 9:52

408

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Scalar product being a projection in Quantum Mechanics

Published on 27 Sep 2017 - 9:34

61

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Simple and fast presentation of theory about projections and universality

Published on 26 Mar 2026 - 1:10

89

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Different versions of Cochran Theorem

Published on 09 Oct 2017 - 16:15

1.4k

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Is every linear projection normal?

Published on 27 Mar 2026 - 22:59

28

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How to prove the following result involving inner product?

Published on 15 Oct 2017 - 10:05

223

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Question on uniqueness of projections in linear algebra

Published on 15 Oct 2017 - 16:41

5.6k

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Confusion on terminology: "vector rejection", "vector projection", and "orthogonal projection"?

Published on 27 Mar 2026 - 23:00

487

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Continuity of the projection function

Published on 27 Mar 2026 - 8:49

142

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Are the Projections' Inverses on Product $\sigma$-Algebra Well Defined?

Published on 27 Mar 2026 - 7:14

1.9k

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Calculating the standard matrix for orthogonal projection, 3 way matrix multiplication

Published on 02 Nov 2017 - 14:24

5.7k

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Show that the projection function is continuous for product spaces

Published on 03 Nov 2017 - 23:44

40

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Is the set of subspaces generated by positive vectors a closed subset of the Grassmanian?

Published on 25 Mar 2026 - 22:05

1k

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vector projection onto a plane

Published on 04 Nov 2017 - 21:20

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How does the 3D to 2D projection for CALTag work

Prove that if $P_i^2=P_i$ and $P_1+...+P_k=I$, then $E=\bigoplus_k \mathrm{Im}(P_k)$ and $P_i P_j=0$ if $i\neq j$

Scalar product being a projection in Quantum Mechanics

Simple and fast presentation of theory about projections and universality

Different versions of Cochran Theorem

Is every linear projection normal?

How to prove the following result involving inner product?

Question on uniqueness of projections in linear algebra

Confusion on terminology: "vector rejection", "vector projection", and "orthogonal projection"?

Continuity of the projection function

Are the Projections' Inverses on Product $\sigma$-Algebra Well Defined?

Calculating the standard matrix for orthogonal projection, 3 way matrix multiplication

Show that the projection function is continuous for product spaces

Is the set of subspaces generated by positive vectors a closed subset of the Grassmanian?

vector projection onto a plane

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