2.2.161 Problems 16001 to 16100

Table 2.323: Main lookup table. Sorted sequentially by problem number.

#

ODE

CAS classification

Solved?

time (sec)

16001

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

[_Bernoulli]

40.951

16002

\[ {}t y^{\prime }-y = t y^{3} \sin \left (t \right ) \]

[[_homogeneous, ‘class D‘], _Bernoulli]

41.560

16003

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

[_Bernoulli]

30.435

16004

\[ {}y^{\prime }+3 y = \sqrt {y}\, \sin \left (t \right ) \]

[_Bernoulli]

2.107

16005

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

[[_homogeneous, ‘class D‘], _rational, _Bernoulli]

2.448

16006

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

[[_homogeneous, ‘class A‘], _rational, _Bernoulli]

2.481

16007

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

[_separable]

2.570

16008

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

[[_homogeneous, ‘class G‘], _rational, _Bernoulli]

7.844

16009

\[ {}\cos \left (\frac {t}{y+t}\right )+{\mathrm e}^{\frac {2 y}{t}} y^{\prime } = 0 \]

[[_homogeneous, ‘class A‘], _dAlembert]

39.604

16010

\[ {}y \ln \left (\frac {t}{y}\right )+\frac {t^{2} y^{\prime }}{y+t} = 0 \]

[[_homogeneous, ‘class A‘], _dAlembert]

4.830

16011

\[ {}2 \ln \left (t \right )-\ln \left (4 y^{2}\right ) y^{\prime } = 0 \]

[_separable]

12.642

16012

\[ {}\frac {2}{t}+\frac {1}{y}+\frac {t y^{\prime }}{y^{2}} = 0 \]

[[_homogeneous, ‘class A‘], _rational, _Bernoulli]

3.233

16013

\[ {}\frac {\sin \left (2 t \right )}{\cos \left (2 y\right )}+\frac {\ln \left (y\right ) y^{\prime }}{\ln \left (t \right )} = 0 \]

[_separable]

9.560

16014

\[ {}\sqrt {t^{2}+1}+y y^{\prime } = 0 \]

[_separable]

2.284

16015

\[ {}2 t +\left (y-3 t \right ) y^{\prime } = 0 \]

[[_homogeneous, ‘class A‘], _rational, [_Abel, ‘2nd type‘, ‘class C‘], _dAlembert]

8.230

16016

\[ {}2 y-3 t +t y^{\prime } = 0 \]

[_linear]

2.545

16017

\[ {}t y-y^{2}+t \left (t -3 y\right ) y^{\prime } = 0 \]

[[_homogeneous, ‘class A‘], _rational, [_Abel, ‘2nd type‘, ‘class B‘]]

105.707

16018

\[ {}t^{2}+t y+y^{2}-t y y^{\prime } = 0 \]

[[_homogeneous, ‘class A‘], _rational, [_Abel, ‘2nd type‘, ‘class B‘]]

38.277

16019

\[ {}t^{3}+y^{3}-t y^{2} y^{\prime } = 0 \]

[[_homogeneous, ‘class A‘], _rational, _Bernoulli]

12.103

16020

\[ {}y^{\prime } = \frac {t +4 y}{4 t +y} \]

[[_homogeneous, ‘class A‘], _rational, [_Abel, ‘2nd type‘, ‘class A‘]]

6.061

16021

\[ {}t -y+t y^{\prime } = 0 \]

[_linear]

1.628

16022

\[ {}y+\left (y+t \right ) y^{\prime } = 0 \]

[[_homogeneous, ‘class A‘], _exact, _rational, [_Abel, ‘2nd type‘, ‘class A‘]]

4.206

16023

\[ {}2 t^{2}-7 t y+5 y^{2}+t y y^{\prime } = 0 \]

[[_homogeneous, ‘class A‘], _rational, [_Abel, ‘2nd type‘, ‘class B‘]]

99.068

16024

\[ {}y+2 \sqrt {t^{2}+y^{2}}-t y^{\prime } = 0 \]

[[_homogeneous, ‘class A‘], _dAlembert]

12.405

16025

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

[[_homogeneous, ‘class A‘], _rational, [_Abel, ‘2nd type‘, ‘class B‘]]

45.946

16026

\[ {}y-\left (3 \sqrt {t y}+t \right ) y^{\prime } = 0 \]

[[_homogeneous, ‘class A‘], _dAlembert]

17.124

16027

\[ {}\left (t^{2}-y^{2}\right ) y^{\prime }+y^{2}+t y = 0 \]

[[_homogeneous, ‘class A‘], _rational, [_Abel, ‘2nd type‘, ‘class A‘]]

4.664

16028

\[ {}t y y^{\prime }-t^{2} {\mathrm e}^{-\frac {y}{t}}-y^{2} = 0 \]

[[_homogeneous, ‘class A‘], _dAlembert]

3.418

16029

\[ {}y^{\prime } = \frac {1}{\frac {2 y \,{\mathrm e}^{-\frac {t}{y}}}{t}+\frac {t}{y}} \]

[[_homogeneous, ‘class A‘], _dAlembert]

4.597

16030

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

[[_homogeneous, ‘class A‘], _dAlembert]

11.352

16031

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

[_Bernoulli]

1.596

16032

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

[_Bernoulli]

1.697

16033

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

[[_homogeneous, ‘class A‘], _rational, _Bernoulli]

98.895

16034

\[ {}t +y-t y^{\prime } = 0 \]
i.c.

[_linear]

2.115

16035

\[ {}t y^{\prime }-y-\sqrt {t^{2}+y^{2}} = 0 \]
i.c.

[[_homogeneous, ‘class A‘], _rational, _dAlembert]

4.618

16036

\[ {}t^{3}+y^{2} \sqrt {t^{2}+y^{2}}-t y \sqrt {t^{2}+y^{2}}\, y^{\prime } = 0 \]
i.c.

[[_homogeneous, ‘class A‘], _dAlembert]

591.126

16037

\[ {}y^{3}-t^{3}-t y^{2} y^{\prime } = 0 \]
i.c.

[[_homogeneous, ‘class A‘], _rational, _Bernoulli]

220.162

16038

\[ {}t y^{3}-\left (t^{4}+y^{4}\right ) y^{\prime } = 0 \]
i.c.

[[_homogeneous, ‘class A‘], _rational, _dAlembert]

20.815

16039

\[ {}y^{4}+\left (t^{4}-t y^{3}\right ) y^{\prime } = 0 \]
i.c.

[[_homogeneous, ‘class A‘], _rational, _dAlembert]

10.454

16040

\[ {}t -2 y+1+\left (4 t -3 y-6\right ) y^{\prime } = 0 \]

[[_homogeneous, ‘class C‘], _rational, [_Abel, ‘2nd type‘, ‘class A‘]]

3.744

16041

\[ {}5 t +2 y+1+\left (2 t +y+1\right ) y^{\prime } = 0 \]

[[_homogeneous, ‘class C‘], _exact, _rational, [_Abel, ‘2nd type‘, ‘class A‘]]

3.375

16042

\[ {}3 t -y+1-\left (6 t -2 y-3\right ) y^{\prime } = 0 \]

[[_homogeneous, ‘class C‘], _rational, [_Abel, ‘2nd type‘, ‘class A‘]]

2.195

16043

\[ {}2 t +3 y+1+\left (4 t +6 y+1\right ) y^{\prime } = 0 \]

[[_homogeneous, ‘class C‘], _rational, [_Abel, ‘2nd type‘, ‘class A‘]]

2.224

16044

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

[_separable]

1.891

16045

\[ {}y^{\prime }+y \cot \left (x \right ) = y^{4} \]
i.c.

[_Bernoulli]

3.576

16046

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

[[_1st_order, _with_linear_symmetries], _Clairaut]

0.436

16047

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

[[_1st_order, _with_linear_symmetries], _rational, _Clairaut]

0.812

16048

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

[[_1st_order, _with_linear_symmetries], _Clairaut]

0.481

16049

\[ {}1+y-t y^{\prime } = \ln \left (y^{\prime }\right ) \]

[[_1st_order, _with_linear_symmetries], _Clairaut]

2.177

16050

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

[[_1st_order, _with_linear_symmetries], _Clairaut]

0.903

16051

\[ {}y = -t y^{\prime }+\frac {{y^{\prime }}^{5}}{5} \]

[_dAlembert]

1.167

16052

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

[_dAlembert]

12.245

16053

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

[_linear]

1.484

16054

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

[[_1st_order, _with_linear_symmetries], _dAlembert]

0.519

16055

\[ {}t^{{1}/{3}} y^{{2}/{3}}+t +\left (t^{{2}/{3}} y^{{1}/{3}}+y\right ) y^{\prime } = 0 \]

[[_homogeneous, ‘class G‘], _rational]

51.906

16056

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

[[_homogeneous, ‘class A‘], _rational, _Bernoulli]

9.406

16057

\[ {}y \sin \left (\frac {t}{y}\right )-\left (t +t \sin \left (\frac {t}{y}\right )\right ) y^{\prime } = 0 \]
i.c.

[[_homogeneous, ‘class A‘], _dAlembert]

8.000

16058

\[ {}y^{\prime } = \frac {2 t^{5}}{5 y^{2}} \]

[_separable]

2.618

16059

\[ {}\cos \left (4 x \right )-8 \sin \left (y\right ) y^{\prime } = 0 \]

[_separable]

3.343

16060

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

[_separable]

2.560

16061

\[ {}y^{\prime } = \frac {{\mathrm e}^{8 y}}{t} \]

[_separable]

1.802

16062

\[ {}y^{\prime } = \frac {{\mathrm e}^{5 t}}{y^{4}} \]

[_separable]

1.620

16063

\[ {}-\frac {1}{x^{5}}+\frac {1}{x^{3}} = \left (2 y^{4}-6 y^{9}\right ) y^{\prime } \]

[_separable]

2.094

16064

\[ {}y^{\prime } = \frac {y \,{\mathrm e}^{-2 t}}{\ln \left (y\right )} \]

[_separable]

1.715

16065

\[ {}y^{\prime } = \frac {\left (4-7 x \right ) \left (2 y-3\right )}{\left (-1+x \right ) \left (2 x -5\right )} \]

[_separable]

2.285

16066

\[ {}y^{\prime }+3 y = -10 \sin \left (t \right ) \]

[[_linear, ‘class A‘]]

1.592

16067

\[ {}3 t +\left (t -4 y\right ) y^{\prime } = 0 \]

[[_homogeneous, ‘class A‘], _rational, [_Abel, ‘2nd type‘, ‘class C‘], _dAlembert]

4.382

16068

\[ {}y-t +\left (y+t \right ) y^{\prime } = 0 \]

[[_homogeneous, ‘class A‘], _exact, _rational, [_Abel, ‘2nd type‘, ‘class A‘]]

4.508

16069

\[ {}y-x +y^{\prime } = 0 \]

[[_linear, ‘class A‘]]

1.247

16070

\[ {}y^{2}+\left (t y+t^{2}\right ) y^{\prime } = 0 \]

[[_homogeneous, ‘class A‘], _rational, [_Abel, ‘2nd type‘, ‘class B‘]]

146.656

16071

\[ {}r^{\prime } = \frac {r^{2}+t^{2}}{r t} \]

[[_homogeneous, ‘class A‘], _rational, _Bernoulli]

5.098

16072

\[ {}x^{\prime } = \frac {5 t x}{x^{2}+t^{2}} \]

[[_homogeneous, ‘class A‘], _rational, _dAlembert]

402.318

16073

\[ {}t^{2}-y+\left (-t +y\right ) y^{\prime } = 0 \]

[_exact, _rational, [_1st_order, ‘_with_symmetry_[F(x),G(x)]‘], [_Abel, ‘2nd type‘, ‘class A‘]]

1.324

16074

\[ {}t^{2} y+\sin \left (t \right )+\left (\frac {t^{3}}{3}-\cos \left (y\right )\right ) y^{\prime } = 0 \]

[_exact]

5.327

16075

\[ {}\tan \left (y\right )-t +\left (t \sec \left (y\right )^{2}+1\right ) y^{\prime } = 0 \]

[_exact]

5.231

16076

\[ {}t \ln \left (y\right )+\left (\frac {t^{2}}{2 y}+1\right ) y^{\prime } = 0 \]

[_exact, [_1st_order, ‘_with_symmetry_[F(x)*G(y),0]‘]]

1.675

16077

\[ {}y^{\prime }+y = 5 \]

[_quadrature]

1.455

16078

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

[_separable]

1.565

16079

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

[_linear]

1.520

16080

\[ {}t r^{\prime }+r = t \cos \left (t \right ) \]

[_linear]

1.485

16081

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

[_Bernoulli]

3.027

16082

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

[[_1st_order, _with_linear_symmetries], _Bernoulli]

2.793

16083

\[ {}y = t y^{\prime }+3 {y^{\prime }}^{4} \]

[[_1st_order, _with_linear_symmetries], _Clairaut]

2.563

16084

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

[[_homogeneous, ‘class D‘], _Bernoulli]

3.085

16085

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

[[_1st_order, _with_linear_symmetries], _Clairaut]

0.426

16086

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

[[_1st_order, _with_linear_symmetries], _Clairaut]

0.424

16087

\[ {}2 x -y-2+\left (2 y-x \right ) y^{\prime } = 0 \]
i.c.

[[_homogeneous, ‘class C‘], _exact, _rational, [_Abel, ‘2nd type‘, ‘class A‘]]

5.372

16088

\[ {}\cos \left (-y+t \right )+\left (1-\cos \left (-y+t \right )\right ) y^{\prime } = 0 \]
i.c.

[[_homogeneous, ‘class C‘], _exact, _dAlembert]

115.289

16089

\[ {}{\mathrm e}^{t y} y-2 t +t \,{\mathrm e}^{t y} y^{\prime } = 0 \]
i.c.

[_exact, [_1st_order, ‘_with_symmetry_[F(x),G(x)*y+H(x)]‘]]

2.027

16090

\[ {}\sin \left (y\right )-y \cos \left (t \right )+\left (t \cos \left (y\right )-\sin \left (t \right )\right ) y^{\prime } = 0 \]
i.c.

[_exact]

9.209

16091

\[ {}y^{2}+\left (2 t y-2 \cos \left (y\right ) \sin \left (y\right )\right ) y^{\prime } = 0 \]
i.c.

[_exact, [_1st_order, ‘_with_symmetry_[F(x)*G(y),0]‘]]

2.372

16092

\[ {}\frac {y}{t}+\ln \left (y\right )+\left (\frac {t}{y}+\ln \left (t \right )\right ) y^{\prime } = 0 \]
i.c.

[_exact]

2.408

16093

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

[[_Riccati, _special]]

17.137

16094

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

[[_homogeneous, ‘class C‘], _dAlembert]

2.880

16095

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

[_separable]

3.063

16096

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

[_separable]

3.840

16097

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

[_separable]

2.339

16098

\[ {}y^{\prime \prime }-y = 0 \]

[[_2nd_order, _missing_x]]

2.074

16099

\[ {}y^{\prime \prime }+2 y^{\prime }+y = 0 \]

[[_2nd_order, _missing_x]]

0.973

16100

\[ {}2 t^{2} y^{\prime \prime }-3 t y^{\prime }-3 y = 0 \]

[[_Emden, _Fowler]]

0.826