2.2.180 Problems 17901 to 18000

Table 2.361: Main lookup table. Sorted sequentially by problem number.

#

ODE

CAS classification

Solved?

time (sec)

17901

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

[[_2nd_order, _with_linear_symmetries]]

0.140

17902

\[ {}x^{2} y^{2} y^{\prime \prime }-3 x y^{2} y^{\prime }+4 y^{3}+x^{6} = 0 \]

[[_2nd_order, _with_linear_symmetries]]

0.132

17903

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

[[_2nd_order, _exact, _nonlinear], [_2nd_order, _with_linear_symmetries], [_2nd_order, _reducible, _mu_x_y1], [_2nd_order, _reducible, _mu_y_y1], [_2nd_order, _reducible, _mu_poly_yn]]

8.194

17904

\[ {}x \left (x^{2} y^{\prime }+2 x y\right ) y^{\prime \prime }+4 x {y^{\prime }}^{2}+8 x y y^{\prime }+4 y^{2}-1 = 0 \]

[NONE]

0.174

17905

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

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

1.030

17906

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

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

35.493

17907

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

[[_2nd_order, _missing_y], [_2nd_order, _reducible, _mu_y_y1]]

1.145

17908

\[ {}x^{2} y y^{\prime \prime }+x^{2} {y^{\prime }}^{2}-5 x y y^{\prime } = 4 y^{2} \]

[[_2nd_order, _with_linear_symmetries], [_2nd_order, _reducible, _mu_xy]]

0.129

17909

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

[[_2nd_order, _missing_x], _Liouville, [_2nd_order, _reducible, _mu_x_y1], [_2nd_order, _reducible, _mu_xy]]

0.549

17910

\[ {}5 {y^{\prime \prime \prime }}^{2}-3 y^{\prime \prime } y^{\prime \prime \prime \prime } = 0 \]

[[_high_order, _missing_x], [_high_order, _missing_y], [_high_order, _with_linear_symmetries], [_high_order, _reducible, _mu_poly_yn]]

0.707

17911

\[ {}40 {y^{\prime \prime \prime }}^{3}-45 y^{\prime \prime } y^{\prime \prime \prime } y^{\prime \prime \prime \prime }+9 {y^{\prime \prime }}^{2} y^{\left (5\right )} = 0 \]

[[_high_order, _missing_x], [_high_order, _missing_y], [_high_order, _with_linear_symmetries]]

0.078

17912

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

[[_2nd_order, _missing_y]]

0.802

17913

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

[[_2nd_order, _missing_y]]

0.776

17914

\[ {}2 x^{3} y^{\prime \prime \prime }-6 x^{2} y^{\prime \prime }+12 x y^{\prime }-12 y = 0 \]

[[_3rd_order, _with_linear_symmetries]]

0.117

17915

\[ {}y^{\prime \prime \prime }-\frac {3 y^{\prime \prime }}{x}+\frac {6 y^{\prime }}{x^{2}}-\frac {6 y}{x^{3}} = 0 \]

[[_3rd_order, _fully, _exact, _linear]]

0.113

17916

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

[_Gegenbauer]

0.944

17917

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

[_Lienard]

1.456

17918

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

[[_2nd_order, _with_linear_symmetries]]

0.858

17919

\[ {}x^{3} y^{\prime \prime \prime }-3 x^{2} y^{\prime \prime }+6 x y^{\prime }-6 y = 0 \]

[[_3rd_order, _with_linear_symmetries]]

0.114

17920

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

[[_3rd_order, _with_linear_symmetries]]

0.035

17921

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

[[_3rd_order, _missing_y]]

0.335

17922

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

[[_2nd_order, _with_linear_symmetries]]

1.584

17923

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

[[_2nd_order, _with_linear_symmetries]]

1.848

17924

\[ {}\left (x^{2}+2\right ) y^{\prime \prime \prime }-2 x y^{\prime \prime }+\left (x^{2}+2\right ) y^{\prime }-2 x y = x^{4}+12 \]

[[_3rd_order, _linear, _nonhomogeneous]]

0.043

17925

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

[[_3rd_order, _missing_x]]

0.051

17926

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

[[_2nd_order, _missing_x]]

2.125

17927

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

[[_2nd_order, _linear, _nonhomogeneous]]

0.323

17928

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

[[_2nd_order, _missing_x]]

3.531

17929

\[ {}\left (2 x +1\right ) y^{\prime \prime }+\left (4 x -2\right ) y^{\prime }-8 y = 0 \]

[[_2nd_order, _with_linear_symmetries]]

1.087

17930

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

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

2.099

17931

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

[[_high_order, _missing_x]]

0.054

17932

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

[[_3rd_order, _missing_x]]

0.053

17933

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

[[_high_order, _missing_x]]

0.067

17934

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

[[_high_order, _missing_x]]

0.058

17935

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

[[_2nd_order, _missing_x]]

0.880

17936

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

[[_high_order, _missing_x]]

0.087

17937

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

[[_2nd_order, _with_linear_symmetries]]

1.341

17938

\[ {}y^{\prime \prime }-6 y^{\prime }+8 y = {\mathrm e}^{x}+{\mathrm e}^{2 x} \]

[[_2nd_order, _linear, _nonhomogeneous]]

1.207

17939

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

[[_3rd_order, _linear, _nonhomogeneous]]

0.119

17940

\[ {}y^{\prime \prime \prime \prime }-4 y^{\prime \prime \prime }+6 y^{\prime \prime }-4 y^{\prime }+y = \left (x +1\right ) {\mathrm e}^{x} \]

[[_high_order, _linear, _nonhomogeneous]]

0.149

17941

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

[[_2nd_order, _linear, _nonhomogeneous]]

5.114

17942

\[ {}y^{\prime \prime }+y^{\prime }+y = {\mathrm e}^{-\frac {x}{2}} \sin \left (\frac {\sqrt {3}\, x}{2}\right ) \]

[[_2nd_order, _linear, _nonhomogeneous]]

36.145

17943

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

[[_2nd_order, _linear, _nonhomogeneous]]

2.502

17944

\[ {}y^{\prime \prime }-2 y = 4 x^{2} {\mathrm e}^{x^{2}} \]

[[_2nd_order, _linear, _nonhomogeneous]]

1.295

17945

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

[[_2nd_order, _linear, _nonhomogeneous]]

4.265

17946

\[ {}y^{\prime \prime }+9 y = \ln \left (2 \sin \left (\frac {x}{2}\right )\right ) \]

[[_2nd_order, _linear, _nonhomogeneous]]

119.984

17947

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

[[_2nd_order, _with_linear_symmetries]]

1.010

17948

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

[[_2nd_order, _with_linear_symmetries]]

1.386

17949

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

[[_2nd_order, _with_linear_symmetries]]

129.907

17950

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

[[_2nd_order, _exact, _linear, _nonhomogeneous]]

1.029

17951

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

[[_3rd_order, _with_linear_symmetries]]

0.326

17952

\[ {}\left (x +1\right )^{2} y^{\prime \prime }+\left (x +1\right ) y^{\prime }+y = 4 \cos \left (\ln \left (x +1\right )\right ) \]

[[_2nd_order, _linear, _nonhomogeneous]]

5.875

17953

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

[[_2nd_order, _with_linear_symmetries]]

0.870

17954

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

[_Lienard]

1.414

17955

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

[_Lienard]

0.908

17956

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

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

1.210

17957

\[ {}y^{\prime \prime }-4 x y^{\prime }+\left (4 x^{2}-1\right ) y = -3 \,{\mathrm e}^{x^{2}} \sin \left (2 x \right ) \]

[[_2nd_order, _linear, _nonhomogeneous]]

4.162

17958

\[ {}y^{\prime \prime }-\frac {y^{\prime }}{\sqrt {x}}+\frac {y \left (-8+\sqrt {x}+x \right )}{4 x^{2}} = 0 \]

[[_2nd_order, _with_linear_symmetries]]

1.099

17959

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

system_of_ODEs

0.892

17960

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

system_of_ODEs

0.413

17961

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

system_of_ODEs

0.030

17962

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

system_of_ODEs

0.029

17963

\[ {}\left [\begin {array}{c} y^{\prime }=-z \\ z^{\prime }=y \end {array}\right ] \]
i.c.

system_of_ODEs

0.537

17964

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

[NONE]

0.122

17965

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

[[_2nd_order, _missing_x], [_Emden, _modified]]

1.527

17966

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

system_of_ODEs

0.036

17967

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

system_of_ODEs

0.029

17968

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

system_of_ODEs

0.389

17969

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

system_of_ODEs

0.522

17970

\[ {}\left [\begin {array}{c} x^{\prime }+5 x+y=7 \,{\mathrm e}^{t}-27 \\ -2 x+y^{\prime }+3 y=-3 \,{\mathrm e}^{t}+12 \end {array}\right ] \]

system_of_ODEs

0.885

17971

\[ {}\left [\begin {array}{c} y^{\prime \prime }+z^{\prime }-2 z={\mathrm e}^{2 x} \\ z^{\prime }+2 y^{\prime }-3 y=0 \end {array}\right ] \]

system_of_ODEs

0.030

17972

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

system_of_ODEs

0.470

17973

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

system_of_ODEs

0.030

17974

\[ {}\left [\begin {array}{c} t x^{\prime }-x-3 y=t \\ t y^{\prime }-x+y=0 \end {array}\right ] \]

system_of_ODEs

0.033

17975

\[ {}\left [\begin {array}{c} t x^{\prime }+6 x-y-3 z=0 \\ t y^{\prime }+23 x-6 y-9 z=0 \\ t z^{\prime }+x+y-2 z=0 \end {array}\right ] \]

system_of_ODEs

0.040

17976

\[ {}\left [\begin {array}{c} x^{\prime }+5 x+y={\mathrm e}^{t} \\ y^{\prime }-x+3 y={\mathrm e}^{2 t} \end {array}\right ] \]

system_of_ODEs

0.499

17977

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

[_quadrature]

0.439

17978

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

[_separable]

2.239

17979

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

[_separable]

2.203

17980

\[ {}y^{\prime } = k y \]

[_quadrature]

0.839

17981

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

[[_2nd_order, _missing_x]]

2.219

17982

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

[[_2nd_order, _missing_x]]

2.028

17983

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

[_rational, [_1st_order, ‘_with_symmetry_[F(x),G(y)]‘]]

4.434

17984

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

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

1.734

17985

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

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

15.999

17986

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

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

7.282

17987

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

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

1.843

17988

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

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

7.458

17989

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

[[_1st_order, _with_linear_symmetries]]

2.092

17990

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

[_quadrature]

1.362

17991

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

[_quadrature]

0.474

17992

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

[_quadrature]

0.441

17993

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

[_quadrature]

0.536

17994

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

[_quadrature]

0.422

17995

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

[_quadrature]

0.571

17996

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

[_quadrature]

0.573

17997

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

[_quadrature]

0.721

17998

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

[_quadrature]

0.651

17999

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

[_separable]

1.710

18000

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

[_separable]

8.397