2.16.27 Problems 2601 to 2700

Table 2.70: Main lookup table. Sorted sequentially by problem number.







#

ODE

Program classification

CAS classification

Solved?

Verified?

time (sec)








2601

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

kovacic, second_order_linear_constant_coeff

[[_2nd_order, _missing_x]]

0.247








2602

\[ {}y^{\prime \prime }-y^{\prime }-6 y = 0 \]

kovacic, second_order_linear_constant_coeff

[[_2nd_order, _missing_x]]

0.178








2603

\[ {}y^{\prime \prime }+6 y^{\prime }+9 y = 0 \]

kovacic, second_order_linear_constant_coeff, linear_second_order_ode_solved_by_an_integrating_factor

[[_2nd_order, _missing_x]]

0.242








2604

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

kovacic, second_order_euler_ode, exact linear second order ode, second_order_integrable_as_is, second_order_change_of_variable_on_x_method_1, second_order_change_of_variable_on_x_method_2, second_order_change_of_variable_on_y_method_2, second_order_ode_non_constant_coeff_transformation_on_B

[[_2nd_order, _exact, _linear, _homogeneous]]

1.474








2605

\[ {}x^{2} y^{\prime \prime }+5 x y^{\prime }+4 y = 0 \]

kovacic, second_order_euler_ode, second_order_change_of_variable_on_x_method_1, second_order_change_of_variable_on_x_method_2, second_order_change_of_variable_on_y_method_2

[[_Emden, _Fowler]]

0.839








2606

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

exact

[‘y=_G(x,y’)‘]

1.505








2607

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

exact

[_rational, [_1st_order, ‘_with_symmetry_[F(x)*G(y),0]‘], [_Abel, ‘2nd type‘, ‘class B‘]]

1.023








2608

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

i.c.

exact

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

1.167








2609

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

exactWithIntegrationFactor

[‘y=_G(x,y’)‘]

37.297








2610

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

i.c.

exact, bernoulli, first_order_ode_lie_symmetry_lookup

[_Bernoulli]

33.947








2611

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

quadrature

[_quadrature]

0.143








2612

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

quadrature

[_quadrature]

0.094








2613

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

kovacic, exact linear second order ode, second_order_integrable_as_is, second_order_ode_missing_y, second_order_ode_quadrature, second_order_linear_constant_coeff

[[_2nd_order, _quadrature]]

0.664








2614

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

kovacic, exact linear second order ode, second_order_integrable_as_is, second_order_ode_missing_y, second_order_ode_quadrature, second_order_linear_constant_coeff

[[_2nd_order, _quadrature]]

0.662








2615

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

i.c.

quadrature

[_quadrature]

0.26








2616

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

i.c.

kovacic, exact linear second order ode, second_order_integrable_as_is, second_order_ode_missing_y, second_order_ode_quadrature, second_order_linear_constant_coeff

[[_2nd_order, _quadrature]]

1.073








2617

\[ {}y^{\prime \prime \prime } = 6 x \]

i.c.

higher_order_linear_constant_coefficients_ODE

[[_3rd_order, _quadrature]]

0.235








2618

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

i.c.

kovacic, exact linear second order ode, second_order_integrable_as_is, second_order_ode_missing_y, second_order_ode_quadrature, second_order_linear_constant_coeff

[[_2nd_order, _quadrature]]

0.981








2619

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

kovacic, second_order_linear_constant_coeff

[[_2nd_order, _missing_x]]

0.194








2620

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

kovacic, second_order_euler_ode, second_order_change_of_variable_on_x_method_2, second_order_change_of_variable_on_y_method_2

[[_Emden, _Fowler]]

0.826








2621

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

kovacic, second_order_euler_ode, second_order_change_of_variable_on_x_method_1, second_order_change_of_variable_on_x_method_2, second_order_change_of_variable_on_y_method_2

[[_2nd_order, _linear, _nonhomogeneous]]

1.636








2622

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

separable

[_separable]

0.128








2623

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

separable

[_separable]

0.11








2624

\[ {}{\mathrm e}^{x +y} y^{\prime }-1 = 0 \]

separable

[_separable]

0.105








2625

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

separable

[_separable]

0.1








2626

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

separable

[_separable]

0.119








2627

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

separable

[_separable]

0.259








2628

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

separable

[_separable]

0.19








2629

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

exact, separable, first_order_ode_lie_symmetry_lookup

[_separable]

1.547








2630

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

separable

[_separable]

0.187








2631

\[ {}y^{\prime } = \frac {x^{2} y-32}{-x^{2}+16}+2 \]

separable

[_separable]

0.254








2632

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

separable

[_separable]

0.269








2633

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

i.c.

separable

[_separable]

0.321








2634

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

i.c.

exact, linear, separable, first_order_ode_lie_symmetry_lookup

[_separable]

2.208








2635

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

i.c.

exact, separable, first_order_ode_lie_symmetry_lookup

[_separable]

1.422








2636

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

i.c.

separable

[_separable]

0.288








2637

\[ {}y^{\prime } = \frac {2 \sqrt {y-1}}{3} \]

i.c.

separable

[_quadrature]

0.395








2638

\[ {}m v^{\prime } = m g -k v^{2} \]

i.c.

separable

[_quadrature]

1.526








2639

\[ {}y^{\prime }+y = 4 \,{\mathrm e}^{x} \]

linear

[[_linear, ‘class A‘]]

0.184








2640

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

linear

[_linear]

0.155








2641

\[ {}x^{2} y^{\prime }-4 x y = x^{7} \sin \left (x \right ) \]

linear

[_linear]

0.178








2642

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

linear

[_linear]

0.166








2643

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

linear

[_linear]

0.214








2644

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

linear

[_linear]

0.195








2645

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

linear

[_linear]

0.198








2646

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

linear

[_linear]

0.165








2647

\[ {}y^{\prime }-y \tan \left (x \right ) = 8 \sin \left (x \right )^{3} \]

linear

[_linear]

0.188








2648

\[ {}t x^{\prime }+2 x = 4 \,{\mathrm e}^{t} \]

linear

[_linear]

0.174








2649

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

linear, exactWithIntegrationFactor, first_order_ode_lie_symmetry_lookup

[_linear]

0.619








2650

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

linear

[_linear]

0.188








2651

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

linear

[_linear]

0.169








2652

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

linear

[[_linear, ‘class A‘]]

0.213








2653

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

linear

[_linear]

0.222








2654

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

i.c.

linear

[_linear]

0.383








2655

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

i.c.

linear, exactWithIntegrationFactor, first_order_ode_lie_symmetry_lookup

[_linear]

1.749








2656

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

i.c.

linear, homogeneousTypeMapleC, exactWithIntegrationFactor, first_order_ode_lie_symmetry_lookup

[_linear]

1.122








2657

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

i.c.

linear, exactWithIntegrationFactor, first_order_ode_lie_symmetry_lookup

[[_linear, ‘class A‘]]

0.675








2658

\[ {}y^{\prime }-2 y = \left \{\begin {array}{cc} 1 & x \le 1 \\ 0 & 1

i.c.

linear, first_order_ode_lie_symmetry_lookup

[[_linear, ‘class A‘]]

1.357








2659

\[ {}y^{\prime }-2 y = \left \{\begin {array}{cc} 1-x & x <1 \\ 0 & 1\le x \end {array}\right . \]

i.c.

linear, first_order_ode_lie_symmetry_lookup

[[_linear, ‘class A‘]]

1.064








2660

\[ {}y^{\prime \prime }+\frac {y^{\prime }}{x} = 9 x \]

kovacic, second_order_ode_missing_y, second_order_ode_non_constant_coeff_transformation_on_B

[[_2nd_order, _missing_y]]

0.858








2661

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

exact, linear, first_order_ode_lie_symmetry_lookup

[_linear]

0.568








2662

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

linear, exactWithIntegrationFactor, first_order_ode_lie_symmetry_lookup

[[_linear, ‘class A‘]]

0.488








2663

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

linear, exactWithIntegrationFactor, first_order_ode_lie_symmetry_lookup

[_linear]

0.724








2664

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

linear, homogeneousTypeD2, exactWithIntegrationFactor, first_order_ode_lie_symmetry_lookup

[_linear]

0.58








2665

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

homogeneous

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

0.319








2666

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

homogeneous

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

0.332








2667

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

homogeneous

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

0.339








2668

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

homogeneous

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

1.664








2669

\[ {}x y^{\prime } = \sqrt {16 x^{2}-y^{2}}+y \]

homogeneous

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

0.809








2670

\[ {}-y+x y^{\prime } = \sqrt {9 x^{2}+y^{2}} \]

homogeneous

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

0.483








2671

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

homogeneous

[_separable]

0.135








2672

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

homogeneous

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

0.69








2673

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

homogeneous

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

0.586








2674

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

homogeneous

[[_homogeneous, ‘class A‘]]

0.325








2675

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

homogeneous

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

0.296








2676

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

homogeneous

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

1.119








2677

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

homogeneous

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

0.352








2678

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

homogeneous

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

0.881








2679

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

homogeneous

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

0.543








2680

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

i.c.

homogeneous

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

0.953








2681

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

i.c.

homogeneous

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

0.803








2682

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

i.c.

homogeneous

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

1.087








2683

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

first_order_ode_lie_symmetry_calculated

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

1.148








2684

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

homogeneous

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

0.393








2685

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

i.c.

homogeneous

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

0.944








2686

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

bernoulli, homogeneousTypeD2, exactWithIntegrationFactor, first_order_ode_lie_symmetry_lookup

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

2.286








2687

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

bernoulli, first_order_ode_lie_symmetry_lookup

[_Bernoulli]

8.359








2688

\[ {}y^{\prime }-\frac {3 y}{2 x} = 6 y^{\frac {1}{3}} x^{2} \ln \left (x \right ) \]

bernoulli, first_order_ode_lie_symmetry_lookup

[_Bernoulli]

2.007








2689

\[ {}y^{\prime }+\frac {2 y}{x} = 6 \sqrt {x^{2}+1}\, \sqrt {y} \]

bernoulli, first_order_ode_lie_symmetry_lookup

[_Bernoulli]

1.845








2690

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

riccati, bernoulli, exactWithIntegrationFactor, first_order_ode_lie_symmetry_lookup

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

0.689








2691

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

bernoulli, first_order_ode_lie_symmetry_lookup

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

0.687








2692

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

bernoulli, first_order_ode_lie_symmetry_lookup

[_rational, _Bernoulli]

2.076








2693

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

bernoulli, first_order_ode_lie_symmetry_lookup

[_Bernoulli]

82.877








2694

\[ {}y^{\prime }+4 x y = 4 x^{3} \sqrt {y} \]

bernoulli, first_order_ode_lie_symmetry_lookup

[_Bernoulli]

1.561








2695

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

bernoulli, first_order_ode_lie_symmetry_lookup

[_Bernoulli]

0.931








2696

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

bernoulli, exactWithIntegrationFactor, first_order_ode_lie_symmetry_lookup

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

0.887








2697

\[ {}2 y^{\prime }+y \cot \left (x \right ) = \frac {8 \cos \left (x \right )^{3}}{y} \]

bernoulli, exactWithIntegrationFactor, first_order_ode_lie_symmetry_lookup

[_Bernoulli]

14.635








2698

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

exact, bernoulli, separable, first_order_ode_lie_symmetry_lookup

[_separable]

187.417








2699

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

i.c.

riccati, bernoulli, first_order_ode_lie_symmetry_lookup

[_rational, _Bernoulli]

1.042








2700

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

i.c.

bernoulli, first_order_ode_lie_symmetry_lookup

[_Bernoulli]

1.64