Question

Is it possible to add/multiply planes?

score 532 · Answer 1 · 2018-02-27 23:37:21

532

Views

Is it possible to add/multiply planes?

Published on 27 Feb 2018 - 23:37

score 41 · Answer 2 · 2018-02-27 23:37:45

41

Views

Proving subspace?

Published on 27 Feb 2018 - 23:37

score 405 · Answer 3 · 2026-03-26 04:33:15

405

Views

Generate a $5 × 5$ matrix such that the each entry is an integer between $1$ and $9$, inclusive, and whose determinant is divisible by $271$.

Published on 26 Mar 2026 - 4:33

score 567 · Answer 4 · 2026-03-26 06:05:24

567

Views

Determinant of matrix whose $(i,j)$ entry is $\min(i,j)$

Published on 26 Mar 2026 - 6:05

score 160 · Answer 5 · 2026-03-27 01:50:39

160

Views

Eigenvalues of $\bf A'(AA'+BB')^{-1}A$

Published on 27 Mar 2026 - 1:50

score 1.5k · Answer 6 · 2018-02-28 01:48:21

1.5k

Views

Is a doubly stochastic matrix positive semidefinite if the maximum of each row occurs on the diagonal?

Published on 28 Feb 2018 - 1:48

score 25 · Answer 7 · 2026-03-26 17:32:45

25

Views

inequality for a family of vectors

Published on 26 Mar 2026 - 17:32

score 1.2k · Answer 8 · 2026-03-26 07:35:23

1.2k

Views

Suppose $V$ is finite-dimensional with dim $V>1$ and $T\in \mathscr L (V)$. Prove that $\{p(T):p\in \mathscr P(\Bbb F)\}\neq \mathscr L(V)$.

Published on 26 Mar 2026 - 7:35

score 291 · Answer 9 · 2018-02-28 02:16:44

291

Views

A collection of most of the properties about a linear operator and its trace.

Published on 28 Feb 2018 - 2:16

score 71 · Answer 10 · 2026-03-27 01:42:38

71

Views

Linear Algebra-Eigenvalue/vectors

Published on 27 Mar 2026 - 1:42

score 3.2k · Answer 11 · 2018-02-28 02:44:45

3.2k

Views

Determine if a vector is in the span of vectors

Published on 28 Feb 2018 - 2:44

score 459 · Answer 12 · 2026-03-24 22:13:59

459

Views

Example of infinite dimensional linear spaces where the space is equal to its dual.

Published on 24 Mar 2026 - 22:13

score 681 · Answer 13 · 2026-03-22 23:03:47

681

Views

For all $x,y\in\mathbb R^n$, $(xy^T)^+=(x^Tx)^+(y^Ty)^+yx^T$

Published on 22 Mar 2026 - 23:03

score 539 · Answer 14 · 2018-02-28 03:32:23

539

Views

Non-symmetric system of linear equations

Published on 28 Feb 2018 - 3:32

score 162 · Answer 15 · 2018-02-28 03:56:51

162

Views

Find A when $A^{-1}B^{-1}=C^{-1}$

Published on 28 Feb 2018 - 3:56

List Question

Is it possible to add/multiply planes?

Proving subspace?

Generate a $5 × 5$ matrix such that the each entry is an integer between $1$ and $9$, inclusive, and whose determinant is divisible by $271$.

Determinant of matrix whose $(i,j)$ entry is $\min(i,j)$

Eigenvalues of $\bf A'(AA'+BB')^{-1}A$

Is a doubly stochastic matrix positive semidefinite if the maximum of each row occurs on the diagonal?

inequality for a family of vectors

Suppose $V$ is finite-dimensional with dim $V>1$ and $T\in \mathscr L (V)$. Prove that $\{p(T):p\in \mathscr P(\Bbb F)\}\neq \mathscr L(V)$.

A collection of most of the properties about a linear operator and its trace.

Linear Algebra-Eigenvalue/vectors

Determine if a vector is in the span of vectors

Example of infinite dimensional linear spaces where the space is equal to its dual.

For all $x,y\in\mathbb R^n$, $(xy^T)^+=(x^Tx)^+(y^Ty)^+yx^T$

Non-symmetric system of linear equations

Find A when $A^{-1}B^{-1}=C^{-1}$

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