Question

Existence of 1-complemented hyperplanes in finite dimensional normed spaces

score 48 · Answer 1 · 2018-08-30 13:53:50

48

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Existence of 1-complemented hyperplanes in finite dimensional normed spaces

Published on 30 Aug 2018 - 13:53

score 928 · Answer 2 · 2018-09-02 23:15:28

928

Views

If $Q$ is hermitian and unitary, prove that $Q=I-2P$ for some orthogonal projection $P$?

Published on 02 Sep 2018 - 23:15

score 250 · Answer 3 · 2018-09-04 11:41:49

250

Views

perpendicular distance between midpoint and a line

Published on 04 Sep 2018 - 11:41

score 164 · Answer 4 · 2026-03-22 18:02:11

164

Views

In what sense are "projecting" and "taking sections" of polytopes dual operations?

Published on 22 Mar 2026 - 18:02

score 286 · Answer 5 · 2018-09-06 07:22:52

286

Views

Show that the projection from $C[0,1]$ onto $P_n[0,1]$ under $L^q$ norm is nonlinear when $q>1$ and $q\neq 2$.

Published on 06 Sep 2018 - 7:22

score 291 · Answer 6 · 2018-09-09 23:37:57

291

Views

Proof: Projection is orthogonal if it is nonexpanding

Published on 09 Sep 2018 - 23:37

score 63 · Answer 7 · 2018-09-10 10:23:49

63

Views

Alternating Projection Convergence Proof

Published on 10 Sep 2018 - 10:23

score 1.5k · Answer 8 · 2018-09-10 21:06:21

1.5k

Views

Proving the uniqueness of a vector projection onto orthogonal complement

Published on 10 Sep 2018 - 21:06

score 90 · Answer 9 · 2018-09-14 12:06:52

90

Views

Proving statements regarding projections onto subspaces

Published on 14 Sep 2018 - 12:06

score 641 · Answer 10 · 2018-09-16 13:53:05

641

Views

Finding the projections associated to the direct sum decomposition of a vector space

Published on 16 Sep 2018 - 13:53

score 71 · Answer 11 · 2018-09-17 07:39:24

71

Views

Projection vectors

Published on 17 Sep 2018 - 7:39

score 1.2k · Answer 12 · 2018-09-19 20:49:20

1.2k

Views

Invert vector projection onto a plane

Published on 19 Sep 2018 - 20:49

score 3.9k · Answer 13 · 2026-03-25 06:21:04

3.9k

Views

Linear combination of Pauli matrices and projectors

Published on 25 Mar 2026 - 6:21

score 1.3k · Answer 14 · 2018-09-22 21:12:00

1.3k

Views

Multiplication of the projection matrix with a vector

Published on 22 Sep 2018 - 21:12

score 46 · Answer 15 · 2018-09-24 22:38:39

46

Views

Lower bound on a spanning set projecting onto any one dimensional subspace

Published on 24 Sep 2018 - 22:38

List Question

Existence of 1-complemented hyperplanes in finite dimensional normed spaces

If $Q$ is hermitian and unitary, prove that $Q=I-2P$ for some orthogonal projection $P$?

perpendicular distance between midpoint and a line

In what sense are "projecting" and "taking sections" of polytopes dual operations?

Show that the projection from $C[0,1]$ onto $P_n[0,1]$ under $L^q$ norm is nonlinear when $q>1$ and $q\neq 2$.

Proof: Projection is orthogonal if it is nonexpanding

Alternating Projection Convergence Proof

Proving the uniqueness of a vector projection onto orthogonal complement

Proving statements regarding projections onto subspaces

Finding the projections associated to the direct sum decomposition of a vector space

Projection vectors

Invert vector projection onto a plane

Linear combination of Pauli matrices and projectors

Multiplication of the projection matrix with a vector

Lower bound on a spanning set projecting onto any one dimensional subspace

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