User learningstudent

7 votes

5 answers

1k views

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

asked Jun 17, 2019 at 14:31

5 votes

2 answers

137 views

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

number-theory rational-numbers continued-fractions

asked May 28, 2019 at 6:16

4 votes

3 answers

681 views

Converting cartesian to polar double integral

calculus integration multivariable-calculus area polar-coordinates

asked May 29, 2020 at 7:16

3 votes

1 answer

131 views

Fourier transform difficulty 2D

calculus integration multivariable-calculus fourier-analysis fourier-transform

asked Apr 24, 2020 at 10:22

3 votes

1 answer

68 views

System of differential equations in RC

calculus ordinary-differential-equations derivatives physics

asked May 25, 2020 at 14:14

3 votes

3 answers

72 views

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

real-analysis supremum-and-infimum

asked Jun 24, 2019 at 6:49

3 votes

2 answers

322 views

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

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

asked Jun 10, 2019 at 15:16

3 votes

1 answer

114 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

asked Aug 4, 2019 at 11:46

2 votes

1 answer

73 views

linear differential equation word problem (salt problem)

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

asked Aug 8, 2019 at 6:29

2 votes

1 answer

349 views

Contours and Closed Path

calculus complex-analysis contour-integration

asked Nov 18, 2019 at 16:52

2 votes

2 answers

75 views

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

calculus integration definite-integrals volume

asked Nov 20, 2019 at 9:02

2 votes

1 answer

38 views

double selection probability

probability combinatorics probability-theory combinations conditional-probability

asked Jan 20, 2020 at 8:45

2 votes

2 answers

172 views

conditional probability or Bayes' theorem?

probability combinatorics probability-theory combinations conditional-probability

asked Jan 20, 2020 at 8:49

2 votes

0 answers

64 views

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

trigonometry physics mathematical-physics wave-equation

asked Jun 29, 2019 at 6:52

2 votes

1 answer

1k 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

asked Sep 7, 2019 at 7:31

2 votes

2 answers

77 views

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

calculus partial-differential-equations partial-derivative characteristics

asked Sep 13, 2019 at 14:10

2 votes

1 answer

49 views

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

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

asked May 29, 2019 at 8:13

2 votes

2 answers

64 views

Geometry problem only needed hint one more

geometry euclidean-geometry circles tangent-line

asked May 31, 2019 at 4:06

2 votes

1 answer

65 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

asked Jun 3, 2019 at 16:58

2 votes

1 answer

78 views

Show that $|A_k|\ne 0$

linear-algebra matrices determinant matrix-decomposition lu-decomposition

asked Jun 9, 2019 at 11:01

2 votes

2 answers

163 views

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

calculus ordinary-differential-equations derivatives

asked Dec 3, 2019 at 9:29

2 votes

1 answer

33 views

diagonalise and nilpotent proof of real values

calculus linear-algebra matrices complex-analysis diagonalization

asked Oct 2, 2020 at 9:15

2 votes

2 answers

39 views

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

linear-algebra vector-spaces vectors vector-fields

asked Feb 13, 2021 at 6:21

2 votes

1 answer

127 views

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

calculus integration inequality definite-integrals piecewise-continuity

asked May 9, 2021 at 16:04

2 votes

1 answer

41 views

Circular Motion, Vectors and Elasticity

physics

asked Aug 5, 2021 at 8:03

1 vote

1 answer

102 views

how to apply IC to solve PDE?

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

asked Oct 17, 2020 at 18:42

1 vote

1 answer

94 views

wave equation PDE

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

asked Oct 18, 2020 at 10:02

1 vote

2 answers

45 views

probability question finding number of balls in jar

probability statistics probability-distributions random-variables

asked Dec 1, 2019 at 17:15

1 vote

1 answer

32 views

diagonalisation as well as nilpotent

linear-algebra matrices diagonalization nilpotence

asked Oct 2, 2020 at 9:03

1 vote

3 answers

59 views

Static equilibirum or rotation

calculus physics classical-mechanics

asked Jan 17, 2020 at 11:15

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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

Fourier transform difficulty 2D

System of differential equations in RC

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

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

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

linear differential equation word problem (salt problem)

Contours and Closed Path

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

double selection probability

conditional probability or Bayes' theorem?

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

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

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

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

Geometry problem only needed hint one more

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

Show that $|A_k|\ne 0$

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

diagonalise and nilpotent proof of real values

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

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

Circular Motion, Vectors and Elasticity

how to apply IC to solve PDE?

wave equation PDE

probability question finding number of balls in jar

diagonalisation as well as nilpotent

Static equilibirum or rotation