2.2.29 Problems 2801 to 2900

Table 2.59: Main lookup table. Sorted sequentially by problem number.

#

ODE

CAS classification

Solved?

time (sec)

2801

\[ {}\left [\begin {array}{c} x^{\prime }=-5 x+3 y \\ y^{\prime }=y-x \end {array}\right ] \]

system_of_ODEs

0.589

2802

\[ {}\left [\begin {array}{c} x^{\prime }=x-4 y \\ y^{\prime }=4 x-7 y \end {array}\right ] \]

system_of_ODEs

0.439

2803

\[ {}\left [\begin {array}{c} x^{\prime }=-7 x+y-6 z \\ y^{\prime }=10 x-4 y+12 z \\ z^{\prime }=2 x-y+z \end {array}\right ] \]

system_of_ODEs

0.496

2804

\[ {}\left [\begin {array}{c} x^{\prime }=3 x+2 y+4 z \\ y^{\prime }=2 x+2 z \\ z^{\prime }=4 x+2 y+3 z \end {array}\right ] \]

system_of_ODEs

0.410

2805

\[ {}\left [\begin {array}{c} x^{\prime }=2 y+z \\ y^{\prime }=-x-3 y-z \\ z^{\prime }=x+y-z \end {array}\right ] \]

system_of_ODEs

0.412

2806

\[ {}\left [\begin {array}{c} x^{\prime }=-2 x+y+z \\ y^{\prime }=-3 x+2 y+3 z \\ z^{\prime }=x-y-2 z \end {array}\right ] \]

system_of_ODEs

0.371

2807

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

system_of_ODEs

0.541

2808

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

system_of_ODEs

0.637

2809

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

[_quadrature]

2.268

2810

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

[_quadrature]

1.965

2811

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

[_quadrature]

1.915

2812

\[ {}\left [\begin {array}{c} x_{1}^{\prime }=x_{2} \\ x_{2}^{\prime }=-\frac {\left (x_{1}^{2}+\sqrt {x_{1}^{2}+4 x_{2}^{2}}\right ) x_{1}}{2} \end {array}\right ] \]

system_of_ODEs

0.033

2813

\[ {}\left [\begin {array}{c} x_{1}^{\prime }=-x_{1}-x_{2}+1 \\ x_{2}^{\prime }=2 x_{1}-x_{2}+5 \end {array}\right ] \]

system_of_ODEs

0.956

2814

\[ {}\left [\begin {array}{c} x^{\prime }=x-x^{3}-x y \\ y^{\prime }=2 y-y^{5}-y \,x^{4} \end {array}\right ] \]

system_of_ODEs

0.041

2815

\[ {}\left [\begin {array}{c} x^{\prime }=x^{2}+y^{2}+1 \\ y^{\prime }=x^{2}-y^{2} \end {array}\right ] \]

system_of_ODEs

0.037

2816

\[ {}\left [\begin {array}{c} x^{\prime }=x^{2}+y^{2}-1 \\ y^{\prime }=2 x y \end {array}\right ] \]

system_of_ODEs

0.028

2817

\[ {}\left [\begin {array}{c} x^{\prime }=6 x-6 x^{2}-2 x y \\ y^{\prime }=4 y-4 y^{2}-2 x y \end {array}\right ] \]

system_of_ODEs

0.035

2818

\[ {}\left [\begin {array}{c} x^{\prime }=\tan \left (x+y\right ) \\ y^{\prime }=x+x^{3} \end {array}\right ] \]

system_of_ODEs

0.031

2819

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

system_of_ODEs

0.030

2820

\[ {}z^{\prime \prime }+z^{3} = 0 \]

[[_2nd_order, _missing_x], [_2nd_order, _reducible, _mu_x_y1]]

4.279

2821

\[ {}z^{\prime \prime }+z+z^{5} = 0 \]

[[_2nd_order, _missing_x], [_2nd_order, _reducible, _mu_x_y1]]

403.913

2822

\[ {}z^{\prime \prime }+{\mathrm e}^{z^{2}} = 1 \]

[[_2nd_order, _missing_x], [_2nd_order, _reducible, _mu_x_y1]]

1.466

2823

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

[[_2nd_order, _missing_x], [_2nd_order, _reducible, _mu_x_y1]]

3.232

2824

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

[[_2nd_order, _missing_x], _Duffing, [_2nd_order, _reducible, _mu_x_y1]]

4.536

2825

\[ {}\left [\begin {array}{c} x_{1}^{\prime }=-5 x_{1}+x_{2} \\ x_{2}^{\prime }=x_{1}-5 x_{2} \end {array}\right ] \]

system_of_ODEs

0.448

2826

\[ {}\left [\begin {array}{c} x_{1}^{\prime }=-x_{2} \\ x_{2}^{\prime }=8 x_{1}-6 x_{2} \end {array}\right ] \]

system_of_ODEs

0.474

2827

\[ {}\left [\begin {array}{c} x_{1}^{\prime }=4 x_{1}-x_{2} \\ x_{2}^{\prime }=-2 x_{1}+5 x_{2} \end {array}\right ] \]

system_of_ODEs

0.474

2828

\[ {}\left [\begin {array}{c} x_{1}^{\prime }=-4 x_{1}-x_{2} \\ x_{2}^{\prime }=x_{1}-6 x_{2} \end {array}\right ] \]

system_of_ODEs

0.437

2829

\[ {}\left [\begin {array}{c} x_{1}^{\prime }=x_{1}-4 x_{2} \\ x_{2}^{\prime }=-8 x_{1}+4 x_{2} \end {array}\right ] \]

system_of_ODEs

0.612

2830

\[ {}\left [\begin {array}{c} x_{1}^{\prime }=3 x_{1}-x_{2} \\ x_{2}^{\prime }=5 x_{1}-3 x_{2} \end {array}\right ] \]

system_of_ODEs

0.464

2831

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

system_of_ODEs

0.796

2832

\[ {}\left [\begin {array}{c} x_{1}^{\prime }=x_{1}-x_{2} \\ x_{2}^{\prime }=5 x_{1}-3 x_{2} \end {array}\right ] \]

system_of_ODEs

0.563

2833

\[ {}\left [\begin {array}{c} x_{1}^{\prime }=2 x_{1}+x_{2} \\ x_{2}^{\prime }=-5 x_{1}-2 x_{2} \end {array}\right ] \]

system_of_ODEs

0.522

2834

\[ {}\left [\begin {array}{c} x_{1}^{\prime }=4 x_{2} \\ x_{2}^{\prime }=-9 x_{1} \end {array}\right ] \]

system_of_ODEs

0.506

2835

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

[[_2nd_order, _missing_x]]

3.028

2836

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

[[_2nd_order, _missing_x]]

3.357

2837

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

[[_2nd_order, _missing_x]]

3.681

2838

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

[[_2nd_order, _missing_x]]

3.076

2839

\[ {}y^{\prime \prime }-2 y^{\prime }+\left (1+\lambda \right ) y = 0 \]
i.c.

[[_2nd_order, _missing_x]]

2.716

2840

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

[[_2nd_order, _missing_x]]

3.028

2841

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

[_separable]

1.649

2842

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

[_separable]

4.246

2843

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

[_separable]

2.266

2844

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

[_separable]

2.161

2845

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

[_separable]

1.642

2846

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

[_separable]

2.738

2847

\[ {}\sqrt {-x^{2}+1}+\sqrt {1-y^{2}}\, y^{\prime } = 0 \]

[_separable]

2.102

2848

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

[_separable]

2.017

2849

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

[_separable]

1.847

2850

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

[_separable]

2.204

2851

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

[_separable]

4.471

2852

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

[_quadrature]

0.603

2853

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

[_separable]

2.241

2854

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

[_separable]

3.850

2855

\[ {}\sec \left (x \right ) \cos \left (y\right )^{2} = \cos \left (x \right ) \sin \left (y\right ) y^{\prime } \]

[_separable]

7.589

2856

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

[_separable]

1.465

2857

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

[_separable]

2.024

2858

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

[_separable]

1.884

2859

\[ {}\tan \left (x \right ) \sin \left (x \right )^{2}+\cos \left (x \right )^{2} \cot \left (y\right ) y^{\prime } = 0 \]

[_separable]

5.758

2860

\[ {}y^{2}+y y^{\prime }+x^{2} y y^{\prime }-1 = 0 \]

[_separable]

4.578

2861

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

[_separable]

2.010

2862

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

[_separable]

2.636

2863

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

[_separable]

3.429

2864

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

[_separable]

3.558

2865

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

[_quadrature]

2.233

2866

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

[_quadrature]

2.632

2867

\[ {}1+y^{2} = \frac {y^{\prime }}{x^{3} \left (-1+x \right )} \]
i.c.

[_separable]

3.070

2868

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

[_rational, _Abel]

15.955

2869

\[ {}\left (x^{2}+x +1\right ) y^{\prime } = y^{2}+2 y+5 \]
i.c.

[_separable]

5.608

2870

\[ {}\left (x^{2}-2 x -8\right ) y^{\prime } = y^{2}+y-2 \]
i.c.

[_separable]

5.332

2871

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

[_linear]

1.526

2872

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

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

38.231

2873

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

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

5.223

2874

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

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

4.404

2875

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

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

90.042

2876

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

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

2.454

2877

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

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

5.025

2878

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

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

4.886

2879

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

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

72.746

2880

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

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

13.032

2881

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

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

4.454

2882

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

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

108.773

2883

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

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

6.713

2884

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

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

5.157

2885

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

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

8.003

2886

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

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

97.135

2887

\[ {}x \,{\mathrm e}^{\frac {y}{x}}+y = x y^{\prime } \]
i.c.

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

5.127

2888

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

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

6.162

2889

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

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

4.906

2890

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

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

92.096

2891

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

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

73.005

2892

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

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

24.429

2893

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

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

53.626

2894

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

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

36.931

2895

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

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

2.871

2896

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

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

3.947

2897

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

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

36.651

2898

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

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

1.789

2899

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

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

36.879

2900

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

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

1.855