2.2.166 Problems 16501 to 16600

Table 2.333: Main lookup table. Sorted sequentially by problem number.

#

ODE

CAS classification

Solved?

time (sec)

16501

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

[[_2nd_order, _missing_y]]

1.465

16502

\[ {}y^{\prime \prime }-3 y^{\prime }+2 y = -4 \,{\mathrm e}^{-2 t} \]

[[_2nd_order, _with_linear_symmetries]]

1.038

16503

\[ {}y^{\prime \prime }-6 y^{\prime }+13 y = 3 \,{\mathrm e}^{-2 t} \]

[[_2nd_order, _with_linear_symmetries]]

16.529

16504

\[ {}y^{\prime \prime }+9 y^{\prime }+20 y = -2 t \,{\mathrm e}^{t} \]

[[_2nd_order, _linear, _nonhomogeneous]]

1.191

16505

\[ {}y^{\prime \prime }+7 y^{\prime }+12 y = 3 t^{2} {\mathrm e}^{-4 t} \]

[[_2nd_order, _linear, _nonhomogeneous]]

1.207

16506

\[ {}y^{\prime \prime \prime }+3 y^{\prime \prime }-9 y^{\prime }+5 y = {\mathrm e}^{t} \]

[[_3rd_order, _with_linear_symmetries]]

0.107

16507

\[ {}y^{\prime \prime \prime }-12 y^{\prime }-16 y = {\mathrm e}^{4 t}-{\mathrm e}^{-2 t} \]

[[_3rd_order, _linear, _nonhomogeneous]]

0.148

16508

\[ {}y^{\prime \prime \prime \prime }+6 y^{\prime \prime \prime }+18 y^{\prime \prime }+30 y^{\prime }+25 y = {\mathrm e}^{-t} \cos \left (2 t \right )+{\mathrm e}^{-2 t} \sin \left (t \right ) \]

[[_high_order, _linear, _nonhomogeneous]]

2.036

16509

\[ {}y^{\prime \prime \prime \prime }+4 y^{\prime \prime \prime }+14 y^{\prime \prime }+20 y^{\prime }+25 y = t^{2} \]

[[_high_order, _with_linear_symmetries]]

0.142

16510

\[ {}y^{\prime \prime }+5 y^{\prime }+6 y = 0 \]
i.c.

[[_2nd_order, _missing_x]]

1.221

16511

\[ {}y^{\prime \prime }+10 y^{\prime }+16 y = 0 \]
i.c.

[[_2nd_order, _missing_x]]

1.507

16512

\[ {}y^{\prime \prime }+16 y = 0 \]
i.c.

[[_2nd_order, _missing_x]]

2.362

16513

\[ {}y^{\prime \prime }+25 y = 0 \]
i.c.

[[_2nd_order, _missing_x]]

3.173

16514

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

[[_2nd_order, _with_linear_symmetries]]

1.253

16515

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

[[_2nd_order, _with_linear_symmetries]]

1.910

16516

\[ {}y^{\prime \prime }+9 y = \sin \left (3 t \right ) \]
i.c.

[[_2nd_order, _linear, _nonhomogeneous]]

4.394

16517

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

[[_2nd_order, _linear, _nonhomogeneous]]

3.654

16518

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

[[_2nd_order, _linear, _nonhomogeneous]]

8.356

16519

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

[[_2nd_order, _linear, _nonhomogeneous]]

4.074

16520

\[ {}y^{\prime \prime }-8 y^{\prime }+16 y = \frac {{\mathrm e}^{4 t}}{t^{3}} \]

[[_2nd_order, _linear, _nonhomogeneous]]

1.348

16521

\[ {}y^{\prime \prime }-8 y^{\prime }+16 y = \frac {{\mathrm e}^{4 t}}{t^{3}} \]

[[_2nd_order, _linear, _nonhomogeneous]]

1.318

16522

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

[[_2nd_order, _linear, _nonhomogeneous]]

1.419

16523

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

[[_2nd_order, _linear, _nonhomogeneous]]

2.085

16524

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

[[_2nd_order, _with_linear_symmetries]]

1.491

16525

\[ {}y^{\prime \prime }+3 y^{\prime }-4 y = 0 \]

[[_2nd_order, _missing_x]]

0.900

16526

\[ {}y^{\prime \prime }+4 y^{\prime }+4 y = 0 \]

[[_2nd_order, _missing_x]]

1.011

16527

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

[[_Emden, _Fowler]]

1.107

16528

\[ {}x^{2} y^{\prime \prime }+7 x y^{\prime }+8 y = 0 \]

[[_Emden, _Fowler]]

0.950

16529

\[ {}x^{2} y^{\prime \prime }-4 x y^{\prime }+6 y = 0 \]

[[_Emden, _Fowler], [_2nd_order, _linear, ‘_with_symmetry_[0,F(x)]‘]]

0.993

16530

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

[[_Emden, _Fowler], [_2nd_order, _linear, ‘_with_symmetry_[0,F(x)]‘]]

1.160

16531

\[ {}2 x^{2} y^{\prime \prime }+5 x y^{\prime }+y = 0 \]
i.c.

[[_2nd_order, _exact, _linear, _homogeneous]]

2.065

16532

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

[[_Emden, _Fowler]]

2.027

16533

\[ {}x^{2} y^{\prime \prime }-7 x y^{\prime }+25 y = 0 \]

[[_Emden, _Fowler]]

17.842

16534

\[ {}x^{2} y^{\prime \prime }-7 x y^{\prime }+15 y = 8 x \]

[[_2nd_order, _with_linear_symmetries]]

1.383

16535

\[ {}y^{\prime \prime }-4 y^{\prime }+4 y = 0 \]

[[_2nd_order, _missing_x]]

0.554

16536

\[ {}y^{\prime \prime }+2 y^{\prime }-3 y = x \,{\mathrm e}^{x} \]

[[_2nd_order, _linear, _nonhomogeneous]]

0.610

16537

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

[_Gegenbauer, [_2nd_order, _linear, ‘_with_symmetry_[0,F(x)]‘]]

0.433

16538

\[ {}3 x y^{\prime \prime }+11 y^{\prime }-y = 0 \]

[[_Emden, _Fowler]]

0.729

16539

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

[[_Emden, _Fowler], [_2nd_order, _linear, ‘_with_symmetry_[0,F(x)]‘]]

0.563

16540

\[ {}x^{2} y^{\prime \prime }-7 x y^{\prime }+\left (-2 x^{2}+7\right ) y = 0 \]

[[_2nd_order, _with_linear_symmetries]]

1.397

16541

\[ {}x \left (1-x \right ) y^{\prime \prime }+\left (2 x +1\right ) y^{\prime }+10 y = 0 \]

[_Jacobi]

0.646

16542

\[ {}x \left (x +1\right ) y^{\prime \prime }+\left (1-2 x \right ) y^{\prime }-10 y = 0 \]

[[_2nd_order, _with_linear_symmetries]]

0.724

16543

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

[[_2nd_order, _exact, _nonlinear], [_2nd_order, _with_linear_symmetries], [_2nd_order, _reducible, _mu_y_y1], [_2nd_order, _reducible, _mu_xy]]

2.673

16544

\[ {}4 x^{\prime \prime }+9 x = 0 \]
i.c.

[[_2nd_order, _missing_x]]

3.117

16545

\[ {}9 x^{\prime \prime }+4 x = 0 \]
i.c.

[[_2nd_order, _missing_x]]

19.260

16546

\[ {}x^{\prime \prime }+64 x = 0 \]
i.c.

[[_2nd_order, _missing_x]]

18.455

16547

\[ {}x^{\prime \prime }+100 x = 0 \]
i.c.

[[_2nd_order, _missing_x]]

25.687

16548

\[ {}x^{\prime \prime }+x = 0 \]
i.c.

[[_2nd_order, _missing_x]]

40.027

16549

\[ {}x^{\prime \prime }+4 x = 0 \]
i.c.

[[_2nd_order, _missing_x]]

3.510

16550

\[ {}x^{\prime \prime }+16 x = 0 \]
i.c.

[[_2nd_order, _missing_x]]

24.383

16551

\[ {}x^{\prime \prime }+256 x = 0 \]
i.c.

[[_2nd_order, _missing_x]]

3.528

16552

\[ {}x^{\prime \prime }+9 x = 0 \]
i.c.

[[_2nd_order, _missing_x]]

3.217

16553

\[ {}10 x^{\prime \prime }+\frac {x}{10} = 0 \]
i.c.

[[_2nd_order, _missing_x]]

22.805

16554

\[ {}x^{\prime \prime }+4 x^{\prime }+3 x = 0 \]
i.c.

[[_2nd_order, _missing_x]]

1.495

16555

\[ {}\frac {x^{\prime \prime }}{32}+2 x^{\prime }+x = 0 \]
i.c.

[[_2nd_order, _missing_x]]

1.204

16556

\[ {}\frac {x^{\prime \prime }}{4}+2 x^{\prime }+x = 0 \]
i.c.

[[_2nd_order, _missing_x]]

1.562

16557

\[ {}4 x^{\prime \prime }+2 x^{\prime }+8 x = 0 \]
i.c.

[[_2nd_order, _missing_x]]

2.976

16558

\[ {}x^{\prime \prime }+4 x^{\prime }+13 x = 0 \]
i.c.

[[_2nd_order, _missing_x]]

3.534

16559

\[ {}x^{\prime \prime }+4 x^{\prime }+20 x = 0 \]
i.c.

[[_2nd_order, _missing_x]]

3.674

16560

\[ {}x^{\prime \prime }+x = \left \{\begin {array}{cc} 1 & 0\le t <\pi \\ 0 & \pi \le t \end {array}\right . \]
i.c.

[[_2nd_order, _linear, _nonhomogeneous]]

4.081

16561

\[ {}x^{\prime \prime }+x = \left \{\begin {array}{cc} \cos \left (t \right ) & 0\le t <\pi \\ 0 & \pi \le t \end {array}\right . \]
i.c.

[[_2nd_order, _linear, _nonhomogeneous]]

8.891

16562

\[ {}x^{\prime \prime }+x = \left \{\begin {array}{cc} t & 0\le t <1 \\ 2-t & 1\le t <2 \\ 0 & 2\le t \end {array}\right . \]
i.c.

[[_2nd_order, _linear, _nonhomogeneous]]

6.530

16563

\[ {}x^{\prime \prime }+4 x^{\prime }+13 x = \left \{\begin {array}{cc} 1 & 0\le t <\pi \\ -t +1 & \pi \le t <2 \pi \\ 0 & 2 \pi \le t \end {array}\right . \]
i.c.

[[_2nd_order, _linear, _nonhomogeneous]]

32.933

16564

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

[[_2nd_order, _linear, _nonhomogeneous]]

3.128

16565

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

[[_2nd_order, _linear, _nonhomogeneous]]

4.218

16566

\[ {}x^{\prime \prime }+x = \cos \left (\frac {9 t}{10}\right ) \]
i.c.

[[_2nd_order, _linear, _nonhomogeneous]]

10.879

16567

\[ {}x^{\prime \prime }+x = \cos \left (\frac {7 t}{10}\right ) \]
i.c.

[[_2nd_order, _linear, _nonhomogeneous]]

8.969

16568

\[ {}x^{\prime \prime }+\frac {x^{\prime }}{10}+x = 3 \cos \left (2 t \right ) \]
i.c.

[[_2nd_order, _linear, _nonhomogeneous]]

79.546

16569

\[ {}\left [\begin {array}{c} x^{\prime }=6 \\ y^{\prime }=\cos \left (t \right ) \end {array}\right ] \]

system_of_ODEs

0.392

16570

\[ {}\left [\begin {array}{c} x^{\prime }=x \\ y^{\prime }=1 \end {array}\right ] \]

system_of_ODEs

0.593

16571

\[ {}\left [\begin {array}{c} x^{\prime }=0 \\ y^{\prime }=-2 y \end {array}\right ] \]

system_of_ODEs

0.422

16572

\[ {}\left [\begin {array}{c} x^{\prime }=x^{2} \\ y^{\prime }={\mathrm e}^{t} \end {array}\right ] \]

system_of_ODEs

0.027

16573

\[ {}\left [\begin {array}{c} x_{1}^{\prime }=-3 x_{1} \\ x_{2}^{\prime }=1 \end {array}\right ] \]
i.c.

system_of_ODEs

0.752

16574

\[ {}\left [\begin {array}{c} x_{1}^{\prime }=-x_{1}+1 \\ x_{2}^{\prime }=x_{2} \end {array}\right ] \]
i.c.

system_of_ODEs

0.749

16575

\[ {}\left [\begin {array}{c} x^{\prime }=-3 x+6 y \\ y^{\prime }=4 x-y \end {array}\right ] \]

system_of_ODEs

0.589

16576

\[ {}\left [\begin {array}{c} x^{\prime }=8 x-y \\ y^{\prime }=x+6 y \end {array}\right ] \]

system_of_ODEs

0.523

16577

\[ {}\left [\begin {array}{c} x^{\prime }=-x-2 y \\ y^{\prime }=x+y \end {array}\right ] \]

system_of_ODEs

0.631

16578

\[ {}\left [\begin {array}{c} x^{\prime }=4 x+2 y \\ y^{\prime }=-x+2 y \end {array}\right ] \]

system_of_ODEs

0.667

16579

\[ {}\left [\begin {array}{c} x^{\prime }=y \\ y^{\prime }=-x+1 \end {array}\right ] \]

system_of_ODEs

0.765

16580

\[ {}\left [\begin {array}{c} x^{\prime }=y \\ y^{\prime }=-x+\sin \left (2 t \right ) \end {array}\right ] \]

system_of_ODEs

0.806

16581

\[ {}x^{\prime \prime }-3 x^{\prime }+4 x = 0 \]

[[_2nd_order, _missing_x]]

2.805

16582

\[ {}x^{\prime \prime }+6 x^{\prime }+9 x = 0 \]

[[_2nd_order, _missing_x]]

1.118

16583

\[ {}x^{\prime \prime }+16 x = t \sin \left (t \right ) \]

[[_2nd_order, _linear, _nonhomogeneous]]

6.164

16584

\[ {}x^{\prime \prime }+x = {\mathrm e}^{t} \]

[[_2nd_order, _with_linear_symmetries]]

2.322

16585

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

[[_Riccati, _special]]

1.459

16586

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

[_separable]

5.625

16587

\[ {}y^{\prime } = y+3 y^{{1}/{3}} \]

[_quadrature]

9.945

16588

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

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

2.706

16589

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

[[_1st_order, _with_linear_symmetries], _dAlembert]

11.298

16590

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

[_quadrature]

44.034

16591

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

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

2.468

16592

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

[‘y=_G(x,y’)‘]

3.391

16593

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

[_quadrature]

1.957

16594

\[ {}y^{\prime } = \left (3 x -y\right )^{{1}/{3}}-1 \]

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

1.895

16595

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

[‘y=_G(x,y’)‘]

1.486

16596

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

[_linear]

1.425

16597

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

[[_linear, ‘class A‘]]

1.392

16598

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

[_separable]

1.597

16599

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

[_quadrature]

0.444

16600

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

[[_linear, ‘class A‘]]

1.298