Question

Vectors- How to find point on a plane closest to a point

score 45 · Answer 1 · 2018-10-15 09:45:15

45

Views

Vectors- How to find point on a plane closest to a point

Published on 15 Oct 2018 - 9:45

score 88 · Answer 2 · 2018-10-15 12:02:47

88

Views

Matrix/vector proof

Published on 15 Oct 2018 - 12:02

score 125 · Answer 3 · 2026-03-26 06:32:31

125

Views

Let $x$, $y$, $z$, $t$ are real numbers. $x+y+z+t=6$ and $\sqrt{1-x^2}+\sqrt{4-y^2}+\sqrt{9-z^2}+\sqrt{16-t^2}=8$ Find each value of them as a number.

Published on 26 Mar 2026 - 6:32

score 69 · Answer 4 · 2026-03-25 22:30:47

69

Views

How to prove $|x_i - x_j| \geq |y_i - y_j| - 2 ||x - y||_\infty $

Published on 25 Mar 2026 - 22:30

score 94 · Answer 5 · 2026-03-27 16:47:42

94

Views

Show that $\|b \|^2\ (\sin\theta)^2 = \min_x\ \|ax-b\|^2$ where $\theta$ is the angle between $a,\ b$.

Published on 27 Mar 2026 - 16:47

score 321 · Answer 6 · 2026-03-26 02:53:53

321

Views

Are all derivatives vectors?

Published on 26 Mar 2026 - 2:53

score 20 · Answer 7 · 2026-03-27 11:49:03

20

Views

Showing the Lemma $s(p-1)-(p-1)d \leq d(σ(k_1)+...+σ(k_m)-(p-1))$

Published on 27 Mar 2026 - 11:49

score 70 · Answer 8 · 2018-10-17 01:18:55

70

Views

Is there an elegant way to determine $Av$ given $Au_1, Au_2$, and $Au_3$ for a $3\times3$ matrix $A$?

Published on 17 Oct 2018 - 1:18

score 35 · Answer 9 · 2026-03-26 01:14:49

35

Views

For which $x\in\mathbb{R}$ does the vector system rank third

Published on 26 Mar 2026 - 1:14

score 72 · Answer 10 · 2018-10-17 18:30:33

72

Views

Finding an unknown magnitude

Published on 17 Oct 2018 - 18:30

score 50 · Answer 11 · 2018-10-18 02:47:02

50

Views

Minimization of the distance between 2 vectors

Published on 18 Oct 2018 - 2:47

score 1.2k · Answer 12 · 2026-04-02 14:57:38

1.2k

Views

A vector in a linearly dependent indexed set is a linear combination of the PRECEDING vectors?

Published on 02 Apr 2026 - 14:57

score 73 · Answer 13 · 2018-10-18 18:58:58

73

Views

Factoring $x$ out of $(x-y)^T(x-y)$?

Published on 18 Oct 2018 - 18:58

score 832 · Answer 14 · 2026-03-26 01:10:26

832

Views

How to write basis vectors in Cartesian coordinates in terms of cylindrical coordinates?

Published on 26 Mar 2026 - 1:10

score 933 · Answer 15 · 2018-10-19 01:35:01

933

Views

If v1 + w, v2 + w,..., vn + w are linearly dependant, prove w belongs to the span of v1, v2,...,vn

Published on 19 Oct 2018 - 1:35

List Question

Vectors- How to find point on a plane closest to a point

Matrix/vector proof

Let $x$, $y$, $z$, $t$ are real numbers. $x+y+z+t=6$ and $\sqrt{1-x^2}+\sqrt{4-y^2}+\sqrt{9-z^2}+\sqrt{16-t^2}=8$ Find each value of them as a number.

How to prove $|x_i - x_j| \geq |y_i - y_j| - 2 ||x - y||_\infty $

Show that $\|b \|^2\ (\sin\theta)^2 = \min_x\ \|ax-b\|^2$ where $\theta$ is the angle between $a,\ b$.

Are all derivatives vectors?

Showing the Lemma $s(p-1)-(p-1)d \leq d(σ(k_1)+...+σ(k_m)-(p-1))$

Is there an elegant way to determine $Av$ given $Au_1, Au_2$, and $Au_3$ for a $3\times3$ matrix $A$?

For which $x\in\mathbb{R}$ does the vector system rank third

Finding an unknown magnitude

Minimization of the distance between 2 vectors

A vector in a linearly dependent indexed set is a linear combination of the PRECEDING vectors?

Factoring $x$ out of $(x-y)^T(x-y)$?

How to write basis vectors in Cartesian coordinates in terms of cylindrical coordinates?

If v1 + w, v2 + w,..., vn + w are linearly dependant, prove w belongs to the span of v1, v2,...,vn

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