2.16.20 Problems 1901 to 2000

Table 2.56: Main lookup table. Sorted sequentially by problem number.

#

ODE

Program classification

CAS classification

Solved?

Verified?

time (sec)

1901

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

exactByInspection, homogeneousTypeD2, first_order_ode_lie_symmetry_calculated

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

2.139

1902

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

first_order_ode_lie_symmetry_calculated

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

2.856

1903

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

exact, differentialType, homogeneousTypeD2, first_order_ode_lie_symmetry_calculated

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

4.781

1904

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

first_order_ode_lie_symmetry_calculated

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

2.621

1905

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

homogeneousTypeD2, first_order_ode_lie_symmetry_calculated

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

2.059

1906

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

first_order_ode_lie_symmetry_calculated

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

4.514

1907

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

bernoulli, homogeneousTypeD2, exactWithIntegrationFactor, first_order_ode_lie_symmetry_lookup

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

1.809

1908

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

exactByInspection, homogeneousTypeD2, first_order_ode_lie_symmetry_calculated

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

2.395

1909

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

exactWithIntegrationFactor, first_order_ode_lie_symmetry_calculated

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

18.583

1910

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

exact, differentialType, homogeneousTypeD2, first_order_ode_lie_symmetry_calculated

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

3.725

1911

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

homogeneousTypeD2, first_order_ode_lie_symmetry_calculated

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

2.396

1912

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

homogeneousTypeD, homogeneousTypeD2, first_order_ode_lie_symmetry_lookup

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

2.111

1913

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

homogeneousTypeD, homogeneousTypeD2, first_order_ode_lie_symmetry_lookup

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

3.426

1914

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

i.c.

bernoulli, homogeneousTypeD2, exactWithIntegrationFactor, first_order_ode_lie_symmetry_lookup

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

2.511

1915

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

homogeneousTypeD2, exactWithIntegrationFactor, first_order_ode_lie_symmetry_calculated

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

4.8

1916

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

i.c.

homogeneousTypeD, homogeneousTypeD2, first_order_ode_lie_symmetry_lookup

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

2.766

1917

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

i.c.

exactByInspection, homogeneousTypeD2, first_order_ode_lie_symmetry_calculated

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

3.561

1918

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

i.c.

homogeneousTypeD, homogeneousTypeD2, first_order_ode_lie_symmetry_lookup

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

4.964

1919

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

i.c.

exactByInspection, homogeneousTypeD2, first_order_ode_lie_symmetry_calculated

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

6.517

1920

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

first_order_ode_lie_symmetry_calculated

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

6.158

1921

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

homogeneousTypeD2, first_order_ode_lie_symmetry_calculated

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

5.408

1922

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

homogeneousTypeD, homogeneousTypeD2, first_order_ode_lie_symmetry_lookup

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

3.241

1923

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

homogeneousTypeMapleC, first_order_ode_lie_symmetry_calculated

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

2.943

1924

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

homogeneousTypeMapleC, first_order_ode_lie_symmetry_calculated

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

5.287

1925

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

homogeneousTypeMapleC, first_order_ode_lie_symmetry_calculated

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

4.047

1926

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

homogeneousTypeMapleC, first_order_ode_lie_symmetry_calculated

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

2.987

1927

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

exact, differentialType, first_order_ode_lie_symmetry_calculated

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

2.164

1928

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

homogeneousTypeMapleC, first_order_ode_lie_symmetry_calculated

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

3.024

1929

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

first_order_ode_lie_symmetry_calculated

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

1.849

1930

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

first_order_ode_lie_symmetry_calculated

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

1.875

1931

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

first_order_ode_lie_symmetry_calculated

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

1.882

1932

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

homogeneousTypeMapleC, first_order_ode_lie_symmetry_calculated

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

5.508

1933

\[ {}3 x -y+1+\left (x -3 y-5\right ) y^{\prime } = 0 \]

i.c.

homogeneousTypeMapleC, first_order_ode_lie_symmetry_calculated

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

6.16

1934

\[ {}6 x -3 y+6+\left (2 x -y+5\right ) y^{\prime } = 0 \]

i.c.

first_order_ode_lie_symmetry_calculated

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

1.849

1935

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

i.c.

homogeneousTypeMapleC, first_order_ode_lie_symmetry_calculated

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

10.464

1936

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

i.c.

first_order_ode_lie_symmetry_calculated

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

2.935

1937

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

i.c.

first_order_ode_lie_symmetry_calculated

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

2.653

1938

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

i.c.

homogeneousTypeMapleC, first_order_ode_lie_symmetry_calculated

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

9.152

1939

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

i.c.

homogeneousTypeMapleC, first_order_ode_lie_symmetry_calculated

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

13.745

1940

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

i.c.

first_order_ode_lie_symmetry_calculated

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

2.68

1941

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

i.c.

first_order_ode_lie_symmetry_calculated

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

4.239

1942

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

i.c.

homogeneousTypeMapleC, first_order_ode_lie_symmetry_calculated

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

42.992

1943

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

exact, differentialType, homogeneousTypeD2, first_order_ode_lie_symmetry_calculated

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

4.179

1944

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

exact, differentialType, homogeneousTypeD2, first_order_ode_lie_symmetry_calculated

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

4.376

1945

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

exact, first_order_ode_lie_symmetry_calculated

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

2.795

1946

\[ {}x \left (6 x y+5\right )+\left (2 x^{3}+3 y\right ) y^{\prime } = 0 \]

exact, differentialType

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

3.313

1947

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

exact

[_exact]

3.523

1948

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

homogeneousTypeD2, exactWithIntegrationFactor, first_order_ode_lie_symmetry_calculated

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

4.753

1949

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

exact

[_exact]

16.003

1950

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

exact, homogeneousTypeD2

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

2.958

1951

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

exact, linear, first_order_ode_lie_symmetry_lookup

[[_linear, ‘class A‘]]

1.329

1952

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

exact

[_exact]

27.461

1953

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

unknown

[_rational]

N/A

1.437

1954

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

exact, linear, separable, homogeneousTypeD2, first_order_ode_lie_symmetry_lookup

[_separable]

1.707

1955

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

exact, homogeneousTypeD2

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

2.969

1956

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

exact, first_order_ode_lie_symmetry_calculated

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

4.761

1957

\[ {}y^{2} \csc \left (x \right )^{2}+6 x y-2 = \left (2 y \cot \left (x \right )-3 x^{2}\right ) y^{\prime } \]

exact

[_exact, [_Abel, ‘2nd type‘, ‘class B‘]]

58.102

1958

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

exact, first_order_ode_lie_symmetry_calculated

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

5.387

1959

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

exact

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

19.427

1960

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

exact

[_exact]

88.614

1961

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

exact

[_exact]

6.221

1962

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

exact

[_exact]

5.852

1963

\[ {}\frac {x^{2}+3 y^{2}}{x \left (3 x^{2}+4 y^{2}\right )}+\frac {\left (2 x^{2}+y^{2}\right ) y^{\prime }}{y \left (3 x^{2}+4 y^{2}\right )} = 0 \]

exact, homogeneousTypeD2, first_order_ode_lie_symmetry_calculated

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

18.233

1964

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

exact, homogeneousTypeD2, first_order_ode_lie_symmetry_calculated

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

23.792

1965

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

exact

[_exact]

3.178

1966

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

linear, homogeneousTypeD2, exactWithIntegrationFactor, first_order_ode_lie_symmetry_lookup

[_linear]

1.441

1967

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

exactWithIntegrationFactor, first_order_ode_lie_symmetry_calculated

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

3.876

1968

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

exact, separable, first_order_ode_lie_symmetry_lookup

[_separable]

2.566

1969

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

riccati, bernoulli, first_order_ode_lie_symmetry_lookup

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

1.413

1970

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

bernoulli, exactWithIntegrationFactor, first_order_ode_lie_symmetry_lookup

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

2.648

1971

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

exactWithIntegrationFactor, first_order_ode_lie_symmetry_calculated

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

2.335

1972

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

riccati, bernoulli, homogeneousTypeD2, exactWithIntegrationFactor, first_order_ode_lie_symmetry_lookup

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

1.716

1973

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

exactWithIntegrationFactor, first_order_ode_lie_symmetry_calculated

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

2.576

1974

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

unknown

[‘y=_G(x,y’)‘]

N/A

2.782

1975

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

exactWithIntegrationFactor, first_order_ode_lie_symmetry_calculated

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

2.267

1976

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

exactWithIntegrationFactor, first_order_ode_lie_symmetry_calculated

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

4.134

1977

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

riccati, bernoulli, exactWithIntegrationFactor, first_order_ode_lie_symmetry_lookup

[_Bernoulli]

1.677

1978

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

exactByInspection

[_rational]

2.014

1979

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

exactWithIntegrationFactor, first_order_ode_lie_symmetry_calculated

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

4.182

1980

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

bernoulli, homogeneousTypeD2, exactWithIntegrationFactor, first_order_ode_lie_symmetry_lookup

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

2.105

1981

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

i.c.

bernoulli, exactWithIntegrationFactor, first_order_ode_lie_symmetry_lookup

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

1.967

1982

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

i.c.

exact, linear, separable, homogeneousTypeD2, first_order_ode_lie_symmetry_lookup

[_separable]

2.358

1983

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

i.c.

exactWithIntegrationFactor, first_order_ode_lie_symmetry_calculated

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

5.316

1984

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

i.c.

exactWithIntegrationFactor

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

2.453

1985

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

i.c.

unknown

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

N/A

2.97

1986

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

i.c.

first_order_ode_lie_symmetry_calculated

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

18.458

1987

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

linear, exactWithIntegrationFactor, first_order_ode_lie_symmetry_lookup

[_linear]

1.292

1988

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

linear, exactWithIntegrationFactor, first_order_ode_lie_symmetry_lookup

[_linear]

1.634

1989

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

linear, exactWithIntegrationFactor, first_order_ode_lie_symmetry_lookup

[_linear]

1.285

1990

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

linear, exactWithIntegrationFactor, first_order_ode_lie_symmetry_lookup

[[_linear, ‘class A‘]]

1.171

1991

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

linear, exactWithIntegrationFactor, first_order_ode_lie_symmetry_lookup

[[_linear, ‘class A‘]]

1.164

1992

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

linear, exactWithIntegrationFactor, first_order_ode_lie_symmetry_lookup

[_linear]

1.446

1993

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

homogeneousTypeD2, exactWithIntegrationFactor, first_order_ode_lie_symmetry_calculated

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

4.38

1994

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

linear, exactWithIntegrationFactor, first_order_ode_lie_symmetry_lookup

[_linear]

1.245

1995

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

exactWithIntegrationFactor, first_order_ode_lie_symmetry_calculated

[[_1st_order, _with_exponential_symmetries]]

1.615

1996

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

linear, exactWithIntegrationFactor, first_order_ode_lie_symmetry_lookup

[_linear]

1.394

1997

\[ {}x y^{\prime } = 5 y+x +1 \]

linear, homogeneousTypeMapleC, exactWithIntegrationFactor, first_order_ode_lie_symmetry_lookup

[_linear]

2.558

1998

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

linear, exactWithIntegrationFactor, first_order_ode_lie_symmetry_lookup

[_linear]

1.525

1999

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

exact, linear, first_order_ode_lie_symmetry_lookup

[_linear]

1.405

2000

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

exactWithIntegrationFactor

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

8.594