Skip to main content
Rócherz's user avatar
Rócherz's user avatar
Rócherz's user avatar
Rócherz
  • Member for 7 years, 1 month
  • Last seen this week
  • #PrayForMexico #MexicoIsDoomed
Stats
4,011
reputation
188k
reached
171
answers
1
question
Loading…
Communities
About

I have a B.Sc. and an M.Sc., both in Applied Mathematics.

English isn’t my first language.

I do read English decently, though.


Let $x=[a, b, c, d, \ldots]^{\mathrm T}$. Then one obvious modal matrix for the rank-1 matrix $xx^{\mathrm T}$ is $$\begin{bmatrix} \def\p{\!\!+\!} a & -b^2a & -c^2a & -d^2a & \ldots \\ b & a^2b & -c^2b & -d^2b & \\ c & & (a^2\p b^2)c & -d^2c \\ d & & & (a^2\p b^2\p c^2)d \\ \vdots & & & &\ddots \end{bmatrix}$$

4
gold badges
14
silver badges
29
bronze badges
49
Score
30
Posts
17
Posts %
48
Score
25
Posts
15
Posts %
46
Score
20
Posts
12
Posts %
27
Score
13
Posts
8
Posts %
20
Score
19
Posts
11
Posts %
15
Score
14
Posts
8
Posts %
Top posts
View all questions and answers