2.2.72 Problems 7101 to 7200

Table 2.145: Main lookup table. Sorted sequentially by problem number.

#

ODE

CAS classification

Solved?

time (sec)

7101

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

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

2.971

7102

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

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

7.419

7103

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

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

87.083

7104

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

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

2.644

7105

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

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

7.629

7106

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

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

2.422

7107

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

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

37.053

7108

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

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

2.066

7109

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

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

24.231

7110

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

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

3.793

7111

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

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

4.249

7112

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

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

4.185

7113

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

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

91.224

7114

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

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

2.943

7115

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

[_quadrature]

1.476

7116

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

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

150.530

7117

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

[_separable]

2.687

7118

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

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

6.727

7119

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

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

1.880

7120

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

[_linear]

1.928

7121

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

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

2.201

7122

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

[_linear]

6.028

7123

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

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

2.524

7124

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

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

3.225

7125

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

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

3.194

7126

\[ {}y^{\prime } = -\frac {4 x +3 y+15}{2 x +y+7} \]

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

4.576

7127

\[ {}y^{\prime } = \frac {x +3 y-5}{x -y-1} \]

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

1.813

7128

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

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

1.755

7129

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

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

1.381

7130

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

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

1.422

7131

\[ {}\left (4 y+x \right ) y^{\prime } = 2 x +3 y-5 \]

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

2.714

7132

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

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

2.936

7133

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

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

7.069

7134

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

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

3.187

7135

\[ {}y^{\prime } = \frac {3 x -y+1}{2 x +y+4} \]

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

5.474

7136

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

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

2.121

7137

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

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

0.574

7138

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

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

0.284

7139

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

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

0.608

7140

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

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

0.435

7141

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

[[_1st_order, _with_linear_symmetries], _Chini]

1.102

7142

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

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

0.561

7143

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

[[_homogeneous, ‘class G‘]]

10.380

7144

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

[[_homogeneous, ‘class G‘]]

3.840

7145

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

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

0.381

7146

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

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

0.431

7147

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

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

0.582

7148

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

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

1.572

7149

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

[[_homogeneous, ‘class G‘]]

0.845

7150

\[ {}x \left (2-9 x y^{2}\right )+y \left (4 y^{2}-6 x^{3}\right ) y^{\prime } = 0 \]

[_exact, _rational]

1.832

7151

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

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

1.384

7152

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

[_separable]

2.520

7153

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

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

5.141

7154

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

[[_2nd_order, _missing_x]]

1.061

7155

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

[[_2nd_order, _exact, _linear, _homogeneous]]

1.231

7156

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

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

2.506

7157

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

[[_2nd_order, _with_linear_symmetries]]

2.158

7158

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

[[_Emden, _Fowler]]

0.940

7159

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

[[_2nd_order, _with_linear_symmetries]]

1.239

7160

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

[[_2nd_order, _exact, _linear, _homogeneous]]

1.898

7161

\[ {}y^{\prime \prime \prime }-2 x y^{\prime \prime }+4 x^{2} y^{\prime }+8 x^{3} y = 0 \]

[[_3rd_order, _with_linear_symmetries]]

0.048

7162

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

[[_2nd_order, _with_linear_symmetries]]

0.308

7163

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

[[_Emden, _Fowler]]

2.845

7164

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

[[_high_order, _with_linear_symmetries]]

0.275

7165

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

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

2.515

7166

\[ {}y^{\prime \prime }+x y^{\prime }+y = 2 x \,{\mathrm e}^{x}-1 \]

[[_2nd_order, _exact, _linear, _nonhomogeneous]]

2.069

7167

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

[[_2nd_order, _with_linear_symmetries]]

1.453

7168

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

[[_2nd_order, _exact, _linear, _nonhomogeneous]]

2.270

7169

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

[[_2nd_order, _with_linear_symmetries]]

2.279

7170

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

[[_2nd_order, _exact, _linear, _nonhomogeneous]]

1.766

7171

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

[[_2nd_order, _with_linear_symmetries]]

1.399

7172

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

[[_2nd_order, _linear, _nonhomogeneous]]

1.904

7173

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

[[_2nd_order, _with_linear_symmetries]]

0.820

7174

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

[[_2nd_order, _linear, _nonhomogeneous]]

4.180

7175

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

[[_2nd_order, _linear, _nonhomogeneous]]

1.837

7176

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

[[_2nd_order, _linear, _nonhomogeneous]]

3.746

7177

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

[[_2nd_order, _linear, _nonhomogeneous]]

2.543

7178

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

[_separable]

3.082

7179

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

[_separable]

1.060

7180

\[ {}y^{\prime } = \frac {3 x^{2}+4 x +2}{2 y-2} \]
i.c.

[_separable]

2.156

7181

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

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

6.038

7182

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

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

1.795

7183

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

[_exact]

1.859

7184

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

[_rational]

1.362

7185

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

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

1.771

7186

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

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

2.658

7187

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

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

1.939

7188

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

[_separable]

2.469

7189

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

[_rational, _Riccati]

1.132

7190

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

[_dAlembert]

364.723

7191

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

[_quadrature]

1.230

7192

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

[_quadrature]

0.465

7193

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

[[_2nd_order, _missing_x]]

0.823

7194

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

[[_2nd_order, _missing_x]]

1.163

7195

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

[[_2nd_order, _missing_x]]

1.708

7196

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

[[_2nd_order, _with_linear_symmetries]]

1.053

7197

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

[[_2nd_order, _linear, _nonhomogeneous]]

1.122

7198

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

[[_2nd_order, _linear, _nonhomogeneous]]

2.867

7199

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

[[_2nd_order, _with_linear_symmetries]]

1.152

7200

\[ {}p \,x^{2} u^{\prime \prime }+q x u^{\prime }+r u = f \left (x \right ) \]

[[_2nd_order, _linear, _nonhomogeneous]]

3.358