User learningstudent

4

7

votes

5

answers

1k

views

Catenary Cable Problem: Timoshenko (2 solvers since last year only)

Nov 25 '19 at 4:58 Claude Leibovici 202k

1

5

votes

2

answers

127

views

$\sqrt{11}$ as rational number within $10^{-4}$?

number-theory rational-numbers continued-fractions

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4

votes

3

answers

575

views

Converting cartesian to polar double integral

calculus integration multivariable-calculus area polar-coordinates

Jun 10 '20 at 9:10 user376343 7,031

1

3

votes

1

answer

65

views

System of differential equations in RC

calculus ordinary-differential-equations derivatives physics

May 26 '20 at 9:15 Jan Eerland 1

3

votes

1

answer

130

views

Fourier transform difficulty 2D

calculus integration multivariable-calculus fourier-analysis fourier-transform

May 2 '20 at 9:32 Manlio 2,752

3

votes

1

answer

109

views

$\iint_A F\cdot n\, dS$ region bounded by $x^2+y^2=1$ and $-1\le z\le 2$

calculus integration multivariable-calculus surface-integrals divergence-operator

Aug 4 '19 at 17:45 Christian Blatter 214k

3

votes

3

answers

71

views

$A=\{\frac ab | a,b \in Z^+ , \frac{a^2}{b^2}<2 \}$

real-analysis supremum-and-infimum

Jun 24 '19 at 8:37 Bman72 2,733

3

votes

2

answers

272

views

Laurent Series $f(z)=\frac{1}{(z+1)(z-2)}$ with conditions

complex-analysis complex-numbers power-series taylor-expansion laurent-series

Jun 10 '19 at 17:11 CommunityBot 1

2

votes

1

answer

41

views

Circular Motion, Vectors and Elasticity

physics

Aug 5 at 9:12 ryang 15.9k

2

votes

1

answer

127

views

Integration $\int_{\frac{1}{10}}^{\frac32}\frac1k da$

calculus integration inequality definite-integrals piecewise-continuity

May 9 at 18:57 learningstudent 1,290

2

votes

2

answers

33

views

span equality $span\{v_1,v_2\}=span\{av_1,bv_2\}$

linear-algebra vector-spaces vectors vector-fields

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2

votes

1

answer

31

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calculus linear-algebra matrices complex-analysis diagonalization

Oct 2 '20 at 21:32 Ben Grossmann 195k

2

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2

answers

168

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conditional probability or Bayes' theorem?

probability combinatorics probability-theory combinations conditional-probability

Jan 20 '20 at 9:04 CommunityBot 1

2

votes

1

answer

37

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double selection probability

probability combinatorics probability-theory combinations conditional-probability

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2

votes

2

answers

152

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$y''+y\ln(1+x)=x+e^x$

calculus ordinary-differential-equations derivatives

Dec 28 '19 at 6:49 Maxim 10.1k

2

votes

2

answers

75

views

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Nov 20 '19 at 16:20 Alec Kalinin 151

2

votes

1

answer

289

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Contours and Closed Path

calculus complex-analysis contour-integration

Nov 18 '19 at 21:58 CommunityBot 1

1

2

votes

2

answers

74

views

Partial differential equation : $z_x+z_y+z=e^{x+2y},z(x,0)=0$

calculus partial-differential-equations partial-derivative characteristics

Sep 13 '19 at 16:15 Lutz Lehmann 104k

2

votes

1

answer

778

views

Maximizing the line integral $\int \mathbf{F}\cdot d\mathbf{r}$ for the vector field $\mathbf{F}=\langle x^2 y+y^3-y,3x+2y^2 x+e^y\rangle$.

calculus integration multivariable-calculus

Sep 7 '19 at 12:20 CommunityBot 1

2

votes

1

answer

62

views

linear differential equation word problem (salt problem)

calculus algebra-precalculus ordinary-differential-equations derivatives word-problem

Aug 8 '19 at 8:02 learningstudent 1,290

2

votes

0

answers

63

views

$A\sin(\omega t - kx)$ [closed]

trigonometry physics mathematical-physics wave-equation

Jun 29 '19 at 8:35 CommunityBot 1

2

votes

0

answers

53

views

Show that $|A_k|\ne 0$

linear-algebra matrices determinant matrix-decomposition lu-decomposition

Jun 9 '19 at 13:09 learningstudent 1,290

2

votes

1

answer

60

views

proving ring of convergence $fg=\sum\limits_{m,n=-\infty}^{\infty} a_n b_m (z-z_0)^{n+m}$

complex-analysis convergence-divergence complex-numbers laurent-series

Jun 4 '19 at 12:33 learningstudent 1,290

2

votes

2

answers

61

views

Geometry problem only needed hint one more

geometry euclidean-geometry circles tangent-line

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2

votes

1

answer

49

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Show that $a_0\leq \alpha \le a_0 +1$

number-theory elementary-number-theory inequality continued-fractions

May 29 '19 at 8:31 learningstudent 1,290

1

vote

0

answers

27

views

What is meant by $f(z)\in A(Z-\text{plane})$ here

complex-analysis complex-numbers plane-geometry

Apr 29 at 13:20 Wolgwang 1,369

1

vote

1

answer

82

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how to apply IC to solve PDE?

ordinary-differential-equations partial-differential-equations parabolic-pde

Oct 19 '20 at 12:32 user2715281 34.8k

1

vote

1

answer

82

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wave equation PDE

integration ordinary-differential-equations partial-differential-equations fourier-series wave-equation

Oct 18 '20 at 20:00 caverac 18.5k

1

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1

answer

30

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diagonalisation as well as nilpotent

linear-algebra matrices diagonalization nilpotence

Oct 2 '20 at 9:28 ancient mathematician 11.2k

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2

answers

44

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Probability double integration

calculus probability integration probability-distributions

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60 Questions

Catenary Cable Problem: Timoshenko (2 solvers since last year only)

$\sqrt{11}$ as rational number within $10^{-4}$?

Converting cartesian to polar double integral

System of differential equations in RC

Fourier transform difficulty 2D

$\iint_A F\cdot n\, dS$ region bounded by $x^2+y^2=1$ and $-1\le z\le 2$

$A=\{\frac ab | a,b \in Z^+ , \frac{a^2}{b^2}<2 \}$

Laurent Series $f(z)=\frac{1}{(z+1)(z-2)}$ with conditions

Circular Motion, Vectors and Elasticity

Integration $\int_{\frac{1}{10}}^{\frac32}\frac1k da$

span equality $span\{v_1,v_2\}=span\{av_1,bv_2\}$

diagonalise and nilpotent proof of real values

conditional probability or Bayes' theorem?

double selection probability

$y''+y\ln(1+x)=x+e^x$

Setting up the volume $\iiint_{?}^{?}dV$

Contours and Closed Path

Partial differential equation : $z_x+z_y+z=e^{x+2y},z(x,0)=0$

Maximizing the line integral $\int \mathbf{F}\cdot d\mathbf{r}$ for the vector field $\mathbf{F}=\langle x^2 y+y^3-y,3x+2y^2 x+e^y\rangle$.

linear differential equation word problem (salt problem)

$A\sin(\omega t - kx)$ [closed]

Show that $|A_k|\ne 0$

proving ring of convergence $fg=\sum\limits_{m,n=-\infty}^{\infty} a_n b_m (z-z_0)^{n+m}$

Geometry problem only needed hint one more

Show that $a_0\leq \alpha \le a_0 +1$

What is meant by $f(z)\in A(Z-\text{plane})$ here

how to apply IC to solve PDE?

wave equation PDE

diagonalisation as well as nilpotent

Probability double integration