2.2.139 Problems 13801 to 13900

Table 2.279: Main lookup table. Sorted sequentially by problem number.

#

ODE

CAS classification

Solved?

time (sec)

13801

\[ {}y^{\prime } = 4 y^{2} \]

[_quadrature]

0.398

13802

\[ {}y^{\prime } = 2 y \left (1-y\right ) \]

[_quadrature]

0.780

13803

\[ {}y^{\prime } = y+t +1 \]

[[_linear, ‘class A‘]]

0.831

13804

\[ {}y^{\prime } = 3 y \left (1-y\right ) \]
i.c.

[_quadrature]

1.108

13805

\[ {}y^{\prime } = 2 y-t \]
i.c.

[[_linear, ‘class A‘]]

1.032

13806

\[ {}y^{\prime } = \left (y+\frac {1}{2}\right ) \left (y+t \right ) \]
i.c.

[_Riccati]

1.496

13807

\[ {}y^{\prime } = \left (1+t \right ) y \]
i.c.

[_separable]

1.428

13808

\[ {}S^{\prime } = S^{3}-2 S^{2}+S \]
i.c.

[_quadrature]

1.309

13809

\[ {}S^{\prime } = S^{3}-2 S^{2}+S \]
i.c.

[_quadrature]

1.296

13810

\[ {}S^{\prime } = S^{3}-2 S^{2}+S \]
i.c.

[_quadrature]

1.212

13811

\[ {}S^{\prime } = S^{3}-2 S^{2}+S \]
i.c.

[_quadrature]

1.139

13812

\[ {}S^{\prime } = S^{3}-2 S^{2}+S \]
i.c.

[_quadrature]

1.206

13813

\[ {}y^{\prime } = y^{2}+y \]

[_quadrature]

0.599

13814

\[ {}y^{\prime } = y^{2}-y \]

[_quadrature]

0.615

13815

\[ {}y^{\prime } = y^{3}+y^{2} \]

[_quadrature]

0.582

13816

\[ {}y^{\prime } = -t^{2}+2 \]

[_quadrature]

0.221

13817

\[ {}y^{\prime } = t y+t y^{2} \]

[_separable]

1.983

13818

\[ {}y^{\prime } = t^{2}+t^{2} y \]

[_separable]

0.961

13819

\[ {}y^{\prime } = t +t y \]

[_separable]

0.932

13820

\[ {}y^{\prime } = t^{2}-2 \]

[_quadrature]

0.220

13821

\[ {}\theta ^{\prime } = \frac {9}{10}-\frac {11 \cos \left (\theta \right )}{10} \]

[_quadrature]

0.606

13822

\[ {}\theta ^{\prime } = 2 \]

[_quadrature]

0.390

13823

\[ {}\theta ^{\prime } = \frac {11}{10}-\frac {9 \cos \left (\theta \right )}{10} \]

[_quadrature]

0.558

13824

\[ {}v^{\prime } = -\frac {v}{R C} \]

[_quadrature]

0.559

13825

\[ {}v^{\prime } = \frac {K -v}{R C} \]

[_quadrature]

0.332

13826

\[ {}v^{\prime } = 2 V \left (t \right )-2 v \]

[[_linear, ‘class A‘]]

1.117

13827

\[ {}y^{\prime } = 2 y+1 \]
i.c.

[_quadrature]

0.589

13828

\[ {}y^{\prime } = t -y^{2} \]
i.c.

[[_Riccati, _special]]

1.112

13829

\[ {}y^{\prime } = y^{2}-4 t \]
i.c.

[[_Riccati, _special]]

1.125

13830

\[ {}y^{\prime } = \sin \left (y\right ) \]
i.c.

[_quadrature]

2.576

13831

\[ {}w^{\prime } = \left (3-w\right ) \left (w+1\right ) \]
i.c.

[_quadrature]

0.738

13832

\[ {}w^{\prime } = \left (3-w\right ) \left (w+1\right ) \]
i.c.

[_quadrature]

0.753

13833

\[ {}y^{\prime } = {\mathrm e}^{\frac {2}{y}} \]
i.c.

[_quadrature]

0.809

13834

\[ {}y^{\prime } = {\mathrm e}^{\frac {2}{y}} \]
i.c.

[_quadrature]

0.804

13835

\[ {}y^{\prime } = y^{2}-y^{3} \]
i.c.

[_quadrature]

1.481

13836

\[ {}y^{\prime } = 2 y^{3}+t^{2} \]
i.c.

[_Abel]

0.379

13837

\[ {}y^{\prime } = \sqrt {y} \]
i.c.

[_quadrature]

0.627

13838

\[ {}y^{\prime } = 2-y \]
i.c.

[_quadrature]

0.461

13839

\[ {}\theta ^{\prime } = \frac {9}{10}-\frac {11 \cos \left (\theta \right )}{10} \]
i.c.

[_quadrature]

1.038

13840

\[ {}y^{\prime } = y \left (y-1\right ) \left (y-3\right ) \]
i.c.

[_quadrature]

2.632

13841

\[ {}y^{\prime } = y \left (y-1\right ) \left (y-3\right ) \]
i.c.

[_quadrature]

1.797

13842

\[ {}y^{\prime } = y \left (y-1\right ) \left (y-3\right ) \]
i.c.

[_quadrature]

4.108

13843

\[ {}y^{\prime } = y \left (y-1\right ) \left (y-3\right ) \]
i.c.

[_quadrature]

2.581

13844

\[ {}y^{\prime } = -y^{2} \]

[_quadrature]

0.385

13845

\[ {}y^{\prime } = y^{3} \]
i.c.

[_quadrature]

0.571

13846

\[ {}y^{\prime } = \frac {1}{\left (y+1\right ) \left (t -2\right )} \]
i.c.

[_separable]

1.113

13847

\[ {}y^{\prime } = \frac {1}{\left (y+2\right )^{2}} \]
i.c.

[_quadrature]

0.381

13848

\[ {}y^{\prime } = \frac {t}{y-2} \]
i.c.

[_separable]

1.935

13849

\[ {}y^{\prime } = 3 y \left (y-2\right ) \]
i.c.

[_quadrature]

1.044

13850

\[ {}y^{\prime } = 3 y \left (y-2\right ) \]
i.c.

[_quadrature]

1.085

13851

\[ {}y^{\prime } = 3 y \left (y-2\right ) \]
i.c.

[_quadrature]

1.039

13852

\[ {}y^{\prime } = 3 y \left (y-2\right ) \]
i.c.

[_quadrature]

1.082

13853

\[ {}y^{\prime } = y^{2}-4 y-12 \]
i.c.

[_quadrature]

0.828

13854

\[ {}y^{\prime } = y^{2}-4 y-12 \]
i.c.

[_quadrature]

0.847

13855

\[ {}y^{\prime } = y^{2}-4 y-12 \]
i.c.

[_quadrature]

0.862

13856

\[ {}y^{\prime } = y^{2}-4 y-12 \]
i.c.

[_quadrature]

0.816

13857

\[ {}y^{\prime } = \cos \left (y\right ) \]
i.c.

[_quadrature]

0.855

13858

\[ {}y^{\prime } = \cos \left (y\right ) \]
i.c.

[_quadrature]

2.155

13859

\[ {}y^{\prime } = \cos \left (y\right ) \]
i.c.

[_quadrature]

1.260

13860

\[ {}y^{\prime } = \cos \left (y\right ) \]
i.c.

[_quadrature]

0.895

13861

\[ {}w^{\prime } = w \cos \left (w\right ) \]

[_quadrature]

0.549

13862

\[ {}w^{\prime } = w \cos \left (w\right ) \]
i.c.

[_quadrature]

0.664

13863

\[ {}w^{\prime } = w \cos \left (w\right ) \]
i.c.

[_quadrature]

0.738

13864

\[ {}w^{\prime } = w \cos \left (w\right ) \]
i.c.

[_quadrature]

0.725

13865

\[ {}w^{\prime } = w \cos \left (w\right ) \]
i.c.

[_quadrature]

0.746

13866

\[ {}w^{\prime } = \left (1-w\right ) \sin \left (w\right ) \]

[_quadrature]

3.595

13867

\[ {}y^{\prime } = \frac {1}{y-2} \]

[_quadrature]

0.378

13868

\[ {}v^{\prime } = -v^{2}-2 v-2 \]

[_quadrature]

0.425

13869

\[ {}w^{\prime } = 3 w^{3}-12 w^{2} \]

[_quadrature]

0.670

13870

\[ {}y^{\prime } = 1+\cos \left (y\right ) \]

[_quadrature]

0.481

13871

\[ {}y^{\prime } = \tan \left (y\right ) \]

[_quadrature]

0.485

13872

\[ {}y^{\prime } = y \ln \left ({| y|}\right ) \]

[_quadrature]

1.185

13873

\[ {}w^{\prime } = \left (w^{2}-2\right ) \arctan \left (w\right ) \]

[_quadrature]

1.033

13874

\[ {}y^{\prime } = y^{2}-4 y+2 \]
i.c.

[_quadrature]

0.660

13875

\[ {}y^{\prime } = y^{2}-4 y+2 \]
i.c.

[_quadrature]

0.578

13876

\[ {}y^{\prime } = y^{2}-4 y+2 \]
i.c.

[_quadrature]

0.653

13877

\[ {}y^{\prime } = y^{2}-4 y+2 \]
i.c.

[_quadrature]

0.660

13878

\[ {}y^{\prime } = y^{2}-4 y+2 \]
i.c.

[_quadrature]

0.651

13879

\[ {}y^{\prime } = y^{2}-4 y+2 \]
i.c.

[_quadrature]

0.657

13880

\[ {}y^{\prime } = y \cos \left (\frac {\pi y}{2}\right ) \]

[_quadrature]

0.646

13881

\[ {}y^{\prime } = y-y^{2} \]

[_quadrature]

0.657

13882

\[ {}y^{\prime } = y \sin \left (\frac {\pi y}{2}\right ) \]

[_quadrature]

0.667

13883

\[ {}y^{\prime } = y^{3}-y^{2} \]

[_quadrature]

0.585

13884

\[ {}y^{\prime } = \cos \left (\frac {\pi y}{2}\right ) \]

[_quadrature]

1.367

13885

\[ {}y^{\prime } = y^{2}-y \]

[_quadrature]

0.612

13886

\[ {}y^{\prime } = y \sin \left (\frac {\pi y}{2}\right ) \]

[_quadrature]

0.675

13887

\[ {}y^{\prime } = y^{2}-y^{3} \]

[_quadrature]

0.623

13888

\[ {}y^{\prime } = -4 y+9 \,{\mathrm e}^{-t} \]

[[_linear, ‘class A‘]]

0.911

13889

\[ {}y^{\prime } = -4 y+3 \,{\mathrm e}^{-t} \]

[[_linear, ‘class A‘]]

0.912

13890

\[ {}y^{\prime } = -3 y+4 \cos \left (2 t \right ) \]

[[_linear, ‘class A‘]]

1.146

13891

\[ {}y^{\prime } = 2 y+\sin \left (2 t \right ) \]

[[_linear, ‘class A‘]]

1.129

13892

\[ {}y^{\prime } = 3 y-4 \,{\mathrm e}^{3 t} \]

[[_linear, ‘class A‘]]

0.883

13893

\[ {}y^{\prime } = \frac {y}{2}+4 \,{\mathrm e}^{\frac {t}{2}} \]

[[_linear, ‘class A‘]]

0.898

13894

\[ {}y^{\prime }+2 y = {\mathrm e}^{\frac {t}{3}} \]
i.c.

[[_linear, ‘class A‘]]

1.173

13895

\[ {}y^{\prime }-2 y = 3 \,{\mathrm e}^{-2 t} \]
i.c.

[[_linear, ‘class A‘]]

1.211

13896

\[ {}y^{\prime }+y = \cos \left (2 t \right ) \]
i.c.

[[_linear, ‘class A‘]]

1.334

13897

\[ {}y^{\prime }+3 y = \cos \left (2 t \right ) \]
i.c.

[[_linear, ‘class A‘]]

1.369

13898

\[ {}y^{\prime }-2 y = 7 \,{\mathrm e}^{2 t} \]
i.c.

[[_linear, ‘class A‘]]

1.087

13899

\[ {}y^{\prime }+2 y = 3 t^{2}+2 t -1 \]

[[_linear, ‘class A‘]]

0.927

13900

\[ {}y^{\prime }+2 y = t^{2}+2 t +1+{\mathrm e}^{4 t} \]

[[_linear, ‘class A‘]]

1.645