2.21.1.2 ODE’s where Existence of solution but not Uniqueness applies

Number of problems in this table is 31

Table 2.518: First order ode where only existence of solution but not uniqueness applies

#

ODE

CAS classification

Solved?

Verified?

22

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

[_quadrature]

885

\[ {}\frac {d}{d x}y \left (x \right ) = {| y \left (x \right )|}+1 \]

[_quadrature]

972

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

[_separable]

2637

\[ {}\frac {d}{d x}y \left (x \right ) = \frac {2 \sqrt {y \left (x \right )-1}}{3} \]

[_quadrature]

3135

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

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

4943

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

[_quadrature]

5721

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

[_quadrature]

6070

\[ {}\frac {d}{d x}y \left (x \right ) = 2 \sqrt {y \left (x \right )} \]

[_quadrature]

7126

\[ {}\frac {d}{d x}y \left (x \right ) = 2 \sqrt {y \left (x \right )} \]

[_quadrature]

7489

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

[_quadrature]

11594

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

[_quadrature]

12658

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

[_separable]

12659

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

[[_1st_order, _with_linear_symmetries], _Clairaut]

12716

\[ {}\frac {d}{d x}y \left (x \right ) = \frac {\sqrt {y \left (x \right )}}{x} \]

[_separable]

12722

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

[_separable]

12725

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

[_quadrature]

12732

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

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

12734

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

[_separable]

12742

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

[[_1st_order, _with_linear_symmetries], _Clairaut]

13297

\[ {}\frac {d}{d x}y \left (x \right ) = 2 \sqrt {y \left (x \right )} \]

[_quadrature]

14127

\[ {}y^{\prime }\left (t \right ) = y \left (t \right )^{\frac {1}{5}} \]

[_quadrature]

14128

\[ {}\frac {y^{\prime }\left (t \right )}{t} = \sqrt {y \left (t \right )} \]

[_separable]

14131

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

[_quadrature]

14137

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

[_quadrature]

14139

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

[_quadrature]

14141

\[ {}y^{\prime }\left (t \right ) = \sqrt {25-y \left (t \right )^{2}} \]

[_quadrature]

14143

\[ {}y^{\prime }\left (t \right ) = \sqrt {25-y \left (t \right )^{2}} \]

[_quadrature]

14328

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

[_exact]

14438

\[ {}\frac {d}{d x}y \left (x \right ) = \sqrt {x -y \left (x \right )} \]

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

14977

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

[_separable]

15005

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

[_separable]