User Rod Carvalho - Mathematics Stack Exchange

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visits	member for	1 year, 6 months
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	1,687 reputation	bio	website		visits	member for	1 year, 6 months
16 badges		location			seen	May 15 at 18:19

149

377

votes

25

answers

24

kviews

Can I use my powers for good?

soft-question career-development

apr 11 at 0:40 MGA 75

35

115

votes

20

answers

5

kviews

Why do mathematicians use single-letter variables?

apr 18 '12 at 10:19 scaaahu 505

22

63

votes

7

answers

2

kviews

Why do people use “it is easy to prove”?

soft-question math-history proof-writing

apr 28 '12 at 17:41 J. M. 38.9k

8

13

votes

2

answers

2

kviews

Cardinality of set of real continuous functions

calculus elementary-set-theory cardinals

aug 20 at 23:54 Ben Millwood 3,732

7

35

votes

5

answers

2

kviews

Has any previously unknown result been proven by an automated theorem prover?

soft-question big-list automated-theorem-proving

sep 22 at 2:56 kjetil b halvorsen 884

2

11

votes

2

answers

2

kviews

Cardinality of the set of all real functions of real variable

elementary-set-theory cardinals

sep 2 at 11:05 Asaf Karagila 90.8k

4

20

votes

3

answers

1

kviews

Can there be two distinct, continuous functions that are equal at all rationals?

calculus real-analysis

jul 27 '11 at 17:15 zar 1,059

1

vote

1

answer

1

kviews

How can I find the time constant of a first order system transfer function?

mathematical-modeling laplace-transform control-theory

jan 26 at 1:00 Community♦ 1

7

6

votes

5

answers

1

kviews

Operations research book to start with

reference-request optimization convex-analysis nonlinear-optimization operations-research

oct 21 at 12:57 Dan 52

2

13

votes

9

answers

1

kviews

Why is the complex number $z=a+bi$ equivalent to the matrix form $\left(\begin{smallmatrix}a &-b\\b&a\end{smallmatrix}\right)$

linear-algebra matrices complex-numbers quaternions

aug 10 at 7:56 Geoff Robinson 9,657

4

18

votes

2

answers

923

views

Geometric intuition behind the Lie bracket of vector fields

differential-geometry intuition

sep 26 at 22:26 Thomas Klimpel 1,784

4

votes

4

answers

908

views

Average Distance Between Random Points on a Line

probability

sep 13 at 18:04 Byron Schmuland 15.4k

3

12

votes

5

answers

864

views

Approximation of $e^{-x}$

approximation exponentiation

aug 15 at 6:46 Jyrki Lahtonen 30.7k

13

30

votes

4

answers

817

views

Rain droplets falling on a table

calculus probability integral probability-theory integration

aug 8 at 0:47 joriki 92.5k

2

5

votes

3

answers

683

views

Boy and Girl paradox

probability paradox

sep 22 at 18:48 Trevor Wilson 5,510

2

12

votes

3

answers

569

views

What exactly is Laplace transform?

laplace-transform

aug 11 at 8:30 copper.hat 28.5k

3

6

votes

3

answers

559

views

Is learning haskell a bad thing for a beginner mathematician?

computer-science category-theory

feb 13 '11 at 4:05 beroal 883

1

6

votes

2

answers

511

views

Meaning of derivatives of vector fields

calculus geometry differential-geometry

sep 13 at 21:13 Jesse Madnick 7,896

1

vote

1

answer

498

views

MDP quadcopter stabilization

machine-learning control-theory

sep 18 at 17:18 MJD 20.8k

1

9

votes

1

answer

378

views

Lyapunov stability question (Arnold's trivium)

control-theory

jan 1 '11 at 10:34 Hans Lundmark 14.5k

4

2

votes

3

answers

371

views

Create polynomial coefficients from its roots

algebra-precalculus polynomials

nov 5 '11 at 1:29 J. M. 38.9k

3

5

votes

2

answers

336

views

What's the meaning of algebraic data type?

type-theory

jan 6 at 18:49 Chris Taylor 13.2k

1

6

votes

3

answers

287

views

What are my chances of winning this card game

probability combinatorics

sep 9 at 17:10 Byron Schmuland 15.4k

1

4

votes

1

answer

271

views

Conditions for a trapping region.

differential-equations dynamical-systems

jan 3 at 6:30 Community♦ 1

1

6

votes

2

answers

260

views

Smooth closed real plane curve intersecting itself at infinitely many points

real-analysis differential-geometry differential-topology

dec 9 at 9:18 Community♦ 1

1

3

votes

3

answers

240

views

Sum of Infinite Surds

algebra-precalculus

sep 23 at 12:27 Did 102k

1

7

votes

3

answers

234

views

calculus of variations question

calculus-of-variations

sep 23 at 17:53 Valentin 2,812

2

10

votes

5

answers

232

views

What is the coefficient of the $x^3$ term in the expansion of $(x^2+x-5)^7$ (See details)?

combinatorics algebra-precalculus multinomial-coefficients

sep 24 at 11:47 Willie Wong♦ 30.7k

3

7

votes

5

answers

222

views

I don't understand $\sqrt{-9i}$.

complex-numbers

sep 23 at 23:56 Rod Carvalho 1,687

1

5

votes

1

answer

215

views

about Jacobian and eigenvalues

eigenvalues dynamical-systems

sep 12 at 13:45 Rod Carvalho 1,687

Rod Carvalho

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