2.2.200 Problems 19901 to 20000

Table 2.417: Main lookup table. Sorted sequentially by problem number.

#

ODE

CAS classification

Solved?

Maple

Mma

Sympy

time(sec)

19901

\begin{align*} y^{2}+\left (y x +x^{2}\right ) y^{\prime }&=0 \\ \end{align*}

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

78.357

19902

\begin{align*} x^{2} y-\left (x^{3}+y^{3}\right ) y^{\prime }&=0 \\ \end{align*}

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

2.526

19903

\begin{align*} \left (3 x +4 y\right ) y^{\prime }+y-2 x&=0 \\ \end{align*}

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

61.677

19904

\begin{align*} 3 y-7 x +7+\left (7 y-3 x +3\right ) y^{\prime }&=0 \\ \end{align*}

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

74.422

19905

\begin{align*} \left (y-3 x +3\right ) y^{\prime }&=2 y-x -4 \\ \end{align*}

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

84.217

19906

\begin{align*} x^{2}-4 y x -2 y^{2}+\left (y^{2}-4 y x -2 x^{2}\right ) y^{\prime }&=0 \\ \end{align*}

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

17.678

19907

\begin{align*} x +y y^{\prime }+\frac {x y^{\prime }-y}{x^{2}+y^{2}}&=0 \\ \end{align*}

[[_1st_order, _with_linear_symmetries], _exact, _rational]

3.905

19908

\begin{align*} a^{2}-2 y x -y^{2}-\left (x +y\right )^{2} y^{\prime }&=0 \\ \end{align*}

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

2.656

19909

\begin{align*} 2 a x +b y+g +\left (2 c y+b x +e \right ) y^{\prime }&=0 \\ \end{align*}

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

69.279

19910

\begin{align*} \left (2 x^{2} y+4 x^{3}-12 x y^{2}+3 y^{2}-x \,{\mathrm e}^{y}+{\mathrm e}^{2 x}\right ) y^{\prime }+12 x^{2} y+2 x y^{2}+4 x^{3}-4 y^{3}+2 y \,{\mathrm e}^{2 x}-{\mathrm e}^{y}&=0 \\ \end{align*}

[_exact]

5.884

19911

\begin{align*} y-x y^{\prime }+\ln \left (x \right )&=0 \\ \end{align*}

[_linear]

4.385

19912

\begin{align*} \left (y x +1\right ) y-x \left (-y x +1\right ) y^{\prime }&=0 \\ \end{align*}

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

52.365

19913

\begin{align*} a \left (x y^{\prime }+2 y\right )&=x y y^{\prime } \\ \end{align*}

[_separable]

9.839

19914

\begin{align*} {\mathrm e}^{x} x^{4}-2 m x y^{2}+2 m \,x^{2} y y^{\prime }&=0 \\ \end{align*}

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

5.073

19915

\begin{align*} y \left ({\mathrm e}^{x}+2 y x \right )-{\mathrm e}^{x} y^{\prime }&=0 \\ \end{align*}

[_Bernoulli]

7.250

19916

\begin{align*} x^{2} y-2 x y^{2}-\left (x^{3}-3 x^{2} y\right ) y^{\prime }&=0 \\ \end{align*}

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

17.734

19917

\begin{align*} y \left (y x +2 x^{2} y^{2}\right )+x \left (y x -x^{2} y^{2}\right ) y^{\prime }&=0 \\ \end{align*}

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

0.947

19918

\begin{align*} 2 y y^{\prime }+2 x +x^{2}+y^{2}&=0 \\ \end{align*}

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

6.616

19919

\begin{align*} x^{2}+y^{2}-x^{2} y y^{\prime }&=0 \\ \end{align*}

[_rational, _Bernoulli]

3.528

19920

\begin{align*} 3 x^{2} y^{4}+2 y x +\left (2 x^{3} y^{3}-x^{2}\right ) y^{\prime }&=0 \\ \end{align*}

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

9.958

19921

\begin{align*} y^{4}+2 y+\left (x y^{3}+2 y^{4}-4 x \right ) y^{\prime }&=0 \\ \end{align*}

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

4.023

19922

\begin{align*} y^{3}-2 x^{2} y+\left (2 x y^{2}-x^{3}\right ) y^{\prime }&=0 \\ \end{align*}

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

32.306

19923

\begin{align*} 2 x^{2} y-3 y^{4}+\left (3 x^{3}+2 x y^{3}\right ) y^{\prime }&=0 \\ \end{align*}

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

16.763

19924

\begin{align*} y^{2}+2 x^{2} y+\left (2 x^{3}-y x \right ) y^{\prime }&=0 \\ \end{align*}

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

49.539

19925

\begin{align*} x y^{\prime }-a y&=x +1 \\ \end{align*}

[_linear]

5.392

19926

\begin{align*} y^{\prime }+y&={\mathrm e}^{-x} \\ \end{align*}

[[_linear, ‘class A‘]]

1.769

19927

\begin{align*} \cos \left (x \right )^{2} y^{\prime }+y&=\tan \left (x \right ) \\ \end{align*}

[_linear]

5.191

19928

\begin{align*} \left (x +1\right ) y^{\prime }-n y&={\mathrm e}^{x} \left (x +1\right )^{n +1} \\ \end{align*}

[_linear]

3.155

19929

\begin{align*} \left (x^{2}+1\right ) y^{\prime }+2 y x&=4 x^{2} \\ \end{align*}

[_linear]

2.118

19930

\begin{align*} y^{\prime }+\frac {y}{x}&=y^{6} x^{2} \\ \end{align*}

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

9.259

19931

\begin{align*} 1+y^{2}&=\left (\arctan \left (y\right )-x \right ) y^{\prime } \\ \end{align*}

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

4.968

19932

\begin{align*} y^{\prime }+\frac {2 y}{x}&=3 x^{2} y^{{1}/{3}} \\ \end{align*}

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

138.689

19933

\begin{align*} y^{\prime }+\frac {x y}{-x^{2}+1}&=x \sqrt {y} \\ \end{align*}

[_rational, _Bernoulli]

4.182

19934

\begin{align*} 3 x \left (-x^{2}+1\right ) y^{2} y^{\prime }+\left (2 x^{2}-1\right ) y^{3}&=a \,x^{3} \\ \end{align*}

[_rational, _Bernoulli]

3.602

19935

\begin{align*} \left (x +y\right )^{2} y^{\prime }&=a^{2} \\ \end{align*}

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

11.718

19936

\begin{align*} x y^{\prime }-y&=\sqrt {x^{2}+y^{2}} \\ \end{align*}

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

12.821

19937

\begin{align*} x y^{\prime }-y&=x \sqrt {x^{2}+y^{2}} \\ \end{align*}

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

4.108

19938

\begin{align*} \sec \left (x \right )^{2} \tan \left (y\right )+\sec \left (y\right )^{2} \tan \left (x \right ) y^{\prime }&=0 \\ \end{align*}

[_separable]

27.498

19939

\begin{align*} y^{2}+x y^{2}+\left (x^{2}-x^{2} y\right ) y^{\prime }&=0 \\ \end{align*}

[_separable]

7.480

19940

\begin{align*} y^{\prime }+\frac {\left (1-2 x \right ) y}{x^{2}}&=1 \\ \end{align*}

[_linear]

3.418

19941

\begin{align*} 3 y^{\prime }+\frac {2 y}{x +1}&=\frac {x^{3}}{y^{2}} \\ \end{align*}

[_rational, _Bernoulli]

3.534

19942

\begin{align*} 2 x -y+1+\left (2 y-x -1\right ) y^{\prime }&=0 \\ \end{align*}

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

16.220

19943

\begin{align*} y^{\prime }+\frac {y}{\sqrt {-x^{2}+1}}&=\frac {x +\sqrt {-x^{2}+1}}{\left (-x^{2}+1\right )^{2}} \\ \end{align*}

[_linear]

9.050

19944

\begin{align*} x y^{\prime }+\frac {y^{2}}{x}&=y \\ \end{align*}

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

6.112

19945

\begin{align*} x \left (-a^{2}+x^{2}+y^{2}\right )+y \left (x^{2}-y^{2}-b^{2}\right ) y^{\prime }&=0 \\ \end{align*}

[_exact, _rational]

3.523

19946

\begin{align*} y^{\prime }+\frac {4 x y}{x^{2}+1}&=\frac {1}{\left (x^{2}+1\right )^{3}} \\ \end{align*}

[_linear]

3.973

19947

\begin{align*} x^{2} y-\left (x^{3}+y^{3}\right ) y^{\prime }&=0 \\ \end{align*}

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

2.282

19948

\begin{align*} x \left (-x^{2}+1\right ) y^{\prime }+\left (2 x^{2}-1\right ) y&=a \,x^{3} \\ \end{align*}

[_linear]

3.323

19949

\begin{align*} x^{2}+y^{2}+1-2 x y y^{\prime }&=0 \\ \end{align*}

[_rational, _Bernoulli]

5.125

19950

\begin{align*} y y^{\prime }+x&=m \left (x y^{\prime }-y\right ) \\ \end{align*}

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

26.259

19951

\begin{align*} y^{\prime }+\cos \left (x \right ) y&=y^{n} \sin \left (2 x \right ) \\ \end{align*}

[_Bernoulli]

7.151

19952

\begin{align*} \left (x +1\right ) y^{\prime }+1&=2 \,{\mathrm e}^{y} \\ \end{align*}

[_separable]

5.426

19953

\begin{align*} y^{\prime }&=x^{3} y^{3}-y x \\ \end{align*}

[_Bernoulli]

3.473

19954

\begin{align*} y+\left (y^{n} a \,x^{2}-2 x \right ) y^{\prime }&=0 \\ \end{align*}

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

17.426

19955

\begin{align*} \left (1-3 x^{2} y+6 y^{2}\right ) y^{\prime }&=3 x y^{2}-x^{2} \\ \end{align*}

[_exact, _rational]

3.085

19956

\begin{align*} y \left (a^{2}+x^{2}+y^{2}\right ) y^{\prime }+x \left (-a^{2}+x^{2}+y^{2}\right )&=0 \\ \end{align*}

[_exact, _rational]

3.217

19957

\begin{align*} \left (x^{2} y^{3}+y x \right ) y^{\prime }&=1 \\ \end{align*}

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

3.114

19958

\begin{align*} y y^{\prime }&=a x \\ \end{align*}

[_separable]

8.958

19959

\begin{align*} y^{\prime } \sqrt {a^{2}+x^{2}}+y&=\sqrt {a^{2}+x^{2}}-x \\ \end{align*}

[_linear]

3.590

19960

\begin{align*} \left (x +y\right ) y^{\prime }+x -y&=0 \\ \end{align*}

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

16.359

19961

\begin{align*} y y^{\prime }+b y^{2}&=a \cos \left (x \right ) \\ \end{align*}

[_Bernoulli]

6.645

19962

\begin{align*} \left (y^{2}-x^{2}\right ) y^{\prime }+2 y x&=0 \\ \end{align*}

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

19.536

19963

\begin{align*} -x y^{\prime }+y&=b \left (1+x^{2} y^{\prime }\right ) \\ \end{align*}

[_separable]

3.748

19964

\begin{align*} 3 y+2 x +4-\left (4 x +6 y+5\right ) y^{\prime }&=0 \\ \end{align*}

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

11.342

19965

\begin{align*} \left (x^{3} y^{3}+x^{2} y^{2}+y x +1\right ) y+\left (x^{3} y^{3}-x^{2} y^{2}-y x +1\right ) x y^{\prime }&=0 \\ \end{align*}

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

0.699

19966

\begin{align*} 2 x^{2} y^{2}+y-\left (x^{3} y-3 x \right ) y^{\prime }&=0 \\ \end{align*}

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

33.201

19967

\begin{align*} x^{2} y^{\prime }+y^{2}&=x y y^{\prime } \\ \end{align*}

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

9.362

19968

\begin{align*} y^{\prime }+\frac {n y}{x}&=a \,x^{-n} \\ \end{align*}

[_linear]

1.123

19969

\begin{align*} \left (x -y\right )^{2} y^{\prime }&=a^{2} \\ \end{align*}

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

3.461

19970

\begin{align*} {y^{\prime }}^{3}+2 {y^{\prime }}^{2} x -y^{2} {y^{\prime }}^{2}-2 x y^{2} y^{\prime }&=0 \\ \end{align*}

[_quadrature]

0.397

19971

\begin{align*} {y^{\prime }}^{2}-a \,x^{3}&=0 \\ \end{align*}

[_quadrature]

0.760

19972

\begin{align*} \left (x +2 y\right ) {y^{\prime }}^{3}+3 \left (x +y\right ) {y^{\prime }}^{2}+\left (2 x +y\right ) y^{\prime }&=0 \\ \end{align*}

[_quadrature]

1.187

19973

\begin{align*} {y^{\prime }}^{3}&=a \,x^{4} \\ \end{align*}

[_quadrature]

1.323

19974

\begin{align*} 4 y^{2} {y^{\prime }}^{2}+2 \left (1+3 x \right ) x y y^{\prime }+3 x^{3}&=0 \\ \end{align*}

[_separable]

0.620

19975

\begin{align*} {y^{\prime }}^{2}-7 y^{\prime }+12&=0 \\ \end{align*}

[_quadrature]

0.191

19976

\begin{align*} x -y y^{\prime }&=a {y^{\prime }}^{2} \\ \end{align*}

[_dAlembert]

58.990

19977

\begin{align*} y&=-a y^{\prime }+\frac {c +a \arcsin \left (y^{\prime }\right )}{\sqrt {1-{y^{\prime }}^{2}}} \\ \end{align*}

[_quadrature]

9.349

19978

\begin{align*} 4 y&={y^{\prime }}^{2}+x^{2} \\ \end{align*}

[[_homogeneous, ‘class G‘]]

4.647

19979

\begin{align*} {y^{\prime }}^{2} x -2 y y^{\prime }+a x&=0 \\ \end{align*}

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

1.029

19980

\begin{align*} y&=2 y^{\prime }+3 {y^{\prime }}^{2} \\ \end{align*}

[_quadrature]

0.693

19981

\begin{align*} \left (1+{y^{\prime }}^{2}\right ) x&=1 \\ \end{align*}

[_quadrature]

0.336

19982

\begin{align*} x^{2}&=a^{2} \left (1+{y^{\prime }}^{2}\right ) \\ \end{align*}

[_quadrature]

0.450

19983

\begin{align*} y^{2}&=a^{2} \left (1+{y^{\prime }}^{2}\right ) \\ \end{align*}

[_quadrature]

0.812

19984

\begin{align*} y^{2}+x y y^{\prime }-{y^{\prime }}^{2} x^{2}&=0 \\ \end{align*}

[_separable]

0.687

19985

\begin{align*} y&=y {y^{\prime }}^{2}+2 x y^{\prime } \\ \end{align*}

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

1.069

19986

\begin{align*} y&=x \left (y^{\prime }+1\right )+{y^{\prime }}^{2} \\ \end{align*}

[[_1st_order, _with_linear_symmetries], _dAlembert]

0.732

19987

\begin{align*} x^{2} \left (-x y^{\prime }+y\right )&=y {y^{\prime }}^{2} \\ \end{align*}

[[_1st_order, _with_linear_symmetries]]

0.862

19988

\begin{align*} y&=x y^{\prime }+\arcsin \left (y^{\prime }\right ) \\ \end{align*}

[_Clairaut]

2.464

19989

\begin{align*} {\mathrm e}^{4 x} \left (y^{\prime }-1\right )+{\mathrm e}^{2 y} {y^{\prime }}^{2}&=0 \\ \end{align*}

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

1.483

19990

\begin{align*} x y \left (-x y^{\prime }+y\right )&=y y^{\prime }+x \\ \end{align*}

[_separable]

5.485

19991

\begin{align*} y^{\prime }+2 y x&=x^{2}+y^{2} \\ \end{align*}

[[_homogeneous, ‘class C‘], _Riccati]

1.556

19992

\begin{align*} {y^{\prime }}^{2} x^{2}-2 x y y^{\prime }+2 y^{2}-x^{2}&=0 \\ \end{align*}

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

1.849

19993

\begin{align*} y&=y^{\prime } \left (x -b \right )+\frac {a}{y^{\prime }} \\ \end{align*}

[[_1st_order, _with_linear_symmetries], _Clairaut]

0.395

19994

\begin{align*} x y^{2} \left ({y^{\prime }}^{2}+2\right )&=2 y^{3} y^{\prime }+x^{3} \\ \end{align*}

[_separable]

1.017

19995

\begin{align*} y&=-x y^{\prime }+x^{4} {y^{\prime }}^{2} \\ \end{align*}

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

0.986

19996

\begin{align*} {y^{\prime }}^{2}-9 y^{\prime }+18&=0 \\ \end{align*}

[_quadrature]

0.207

19997

\begin{align*} a y {y^{\prime }}^{2}+\left (2 x -b \right ) y^{\prime }-y&=0 \\ \end{align*}

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

1.705

19998

\begin{align*} \left (x y^{\prime }-y\right )^{2}&=a \left (1+{y^{\prime }}^{2}\right ) \left (x^{2}+y^{2}\right )^{{3}/{2}} \\ \end{align*}

[[_1st_order, _with_linear_symmetries]]

204.188

19999

\begin{align*} \left (x y^{\prime }-y\right )^{2}&={y^{\prime }}^{2}-\frac {2 y y^{\prime }}{x}+1 \\ \end{align*}

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

98.914

20000

\begin{align*} 3 y^{2} {y^{\prime }}^{2}-2 x y y^{\prime }-x^{2}+4 y^{2}&=0 \\ \end{align*}

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

2.227