Question

Geometrically explained, why do Linear Transformations Take a circle to an ellipse

score 6.2k · Answer 1 · 2019-04-24 14:03:05

6.2k

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Geometrically explained, why do Linear Transformations Take a circle to an ellipse

Published on 24 Apr 2019 - 14:03

score 1.2k · Answer 2 · 2026-03-26 15:17:12

1.2k

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Why is $\mathbb{R}$ unbounded, despite being equinumerous to various bounded sets? Is there a name for this “distinction”?

Published on 26 Mar 2026 - 15:17

score 853 · Answer 3 · 2026-03-29 04:41:38

853

Views

How to be good at coming up with counter example in Topology

Published on 29 Mar 2026 - 4:41

score 135 · Answer 4 · 2026-03-25 17:42:15

135

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Lie derivative isn't $\lim_{t\rightarrow 0} \frac{W_{\theta_t(p)}-W_p}{t}$ in $\mathbb{R^n}$? Why?

Published on 25 Mar 2026 - 17:42

score 136 · Answer 5 · 2026-03-27 08:44:16

136

Views

Geometric Intuition behind trace and matrix non-commutativity

Published on 27 Mar 2026 - 8:44

score 188 · Answer 6 · 2026-03-25 01:31:26

188

Views

Intuition for why function composition associative

Published on 25 Mar 2026 - 1:31

score 116 · Answer 7 · 2026-03-25 14:47:04

116

Views

How to find a Jordan basis and a Jordan matrix for a nilpotent matrix?

Published on 25 Mar 2026 - 14:47

score 628 · Answer 8 · 2026-03-25 12:33:03

628

Views

Manhattan distance problem with infinite zig zags

Published on 25 Mar 2026 - 12:33

score 378 · Answer 9 · 2019-05-03 20:19:04

How to use the condition that $\vec a_i \cdot \vec b_j=2\pi\delta_{ij}$ to find reciprocal lattice vectors, $b_j$, for this rectangular lattice?

score 87 · Answer 10 · 2026-03-26 09:25:36

87

Views

Symplectomorphism, intuitive interpretation.

Published on 26 Mar 2026 - 9:25

score 687 · Answer 11 · 2026-03-25 06:21:00

687

Views

Interpretation of the pushforward of a vector under a flow.

Published on 25 Mar 2026 - 6:21

score 32 · Answer 12 · 2026-03-25 18:53:43

32

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Intuition behind joint pdf with transformations with partitioned support

Published on 25 Mar 2026 - 18:53

score 1.4k · Answer 13 · 2019-05-05 15:58:02

1.4k

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Problem with estimating a sequence with intuition

Published on 05 May 2019 - 15:58

score 131 · Answer 14 · 2026-03-25 22:10:51

131

Views

Describe the Bidual of Real Polynomials

Published on 25 Mar 2026 - 22:10

score 336 · Answer 15 · 2019-05-08 18:33:21

336

Views

Connections and metrics on Riemannian manifolds

Published on 08 May 2019 - 18:33

List Question

Geometrically explained, why do Linear Transformations Take a circle to an ellipse

Why is $\mathbb{R}$ unbounded, despite being equinumerous to various bounded sets? Is there a name for this “distinction”?

How to be good at coming up with counter example in Topology

Lie derivative isn't $\lim_{t\rightarrow 0} \frac{W_{\theta_t(p)}-W_p}{t}$ in $\mathbb{R^n}$? Why?

Geometric Intuition behind trace and matrix non-commutativity

Intuition for why function composition associative

How to find a Jordan basis and a Jordan matrix for a nilpotent matrix?

Manhattan distance problem with infinite zig zags

How to use the condition that $\vec a_i \cdot \vec b_j=2\pi\delta_{ij}$ to find reciprocal lattice vectors, $b_j$, for this rectangular lattice?

Symplectomorphism, intuitive interpretation.

Interpretation of the pushforward of a vector under a flow.

Intuition behind joint pdf with transformations with partitioned support

Problem with estimating a sequence with intuition

Describe the Bidual of Real Polynomials

Connections and metrics on Riemannian manifolds

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