2.16.67 Problems 6601 to 6700

Table 2.150: Main lookup table. Sorted sequentially by problem number.







#

ODE

Program classification

CAS classification

Solved?

Verified?

time (sec)








6601

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

second order series method. Regular singular point. Difference not integer

[[_2nd_order, _with_linear_symmetries]]

3.319








6602

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

second order series method. Regular singular point. Difference not integer

[[_2nd_order, _exact, _linear, _homogeneous]]

3.54








6603

\[ {}x^{2} y^{\prime \prime }-\left (x -\frac {2}{9}\right ) y = 0 \]

second order series method. Regular singular point. Difference not integer

[[_2nd_order, _with_linear_symmetries]]

3.386








6604

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

second order series method. Regular singular point. Difference not integer

[_Laguerre]

3.592








6605

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

second order series method. Regular singular point. Difference not integer

[[_2nd_order, _with_linear_symmetries]]

3.169








6606

\[ {}9 x^{2} y^{\prime \prime }+9 x^{2} y^{\prime }+2 y = 0 \]

second order series method. Regular singular point. Difference not integer

[[_2nd_order, _with_linear_symmetries]]

3.709








6607

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

second order series method. Regular singular point. Difference not integer

[[_2nd_order, _with_linear_symmetries]]

5.222








6608

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

second order series method. Regular singular point. Difference is integer

[[_2nd_order, _with_linear_symmetries]]

3.204








6609

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

second order series method. Regular singular point. Difference is integer

[[_2nd_order, _with_linear_symmetries]]

3.059








6610

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

second order series method. Regular singular point. Difference is integer

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

9.587








6611

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

second order series method. Regular singular point. Difference is integer

[[_2nd_order, _with_linear_symmetries]]

8.763








6612

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

second order series method. Regular singular point. Repeated root

[[_2nd_order, _exact, _linear, _homogeneous]]

2.917








6613

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

second order series method. Regular singular point. Repeated root

[[_Emden, _Fowler]]

2.838








6614

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

second order series method. Regular singular point. Difference is integer

[[_2nd_order, _with_linear_symmetries]]

3.729








6615

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

second order series method. Regular singular point. Difference is integer

[[_2nd_order, _exact, _linear, _homogeneous]]

3.42








6616

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

second order series method. Regular singular point. Difference is integer

[[_2nd_order, _with_linear_symmetries]]

3.193








6617

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

second order series method. Irregular singular point

[[_Emden, _Fowler]]

N/A

0.56








6618

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

second order series method. Irregular singular point

[[_2nd_order, _exact, _linear, _homogeneous]]

N/A

0.941








6619

\[ {}x^{2} y^{\prime \prime }+x y^{\prime }+\left (x^{2}-\frac {1}{9}\right ) y = 0 \]

second_order_bessel_ode

[[_2nd_order, _with_linear_symmetries]]

2.532








6620

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

second_order_bessel_ode

[_Bessel]

2.393








6621

\[ {}4 x^{2} y^{\prime \prime }+4 x y^{\prime }+\left (4 x^{2}-25\right ) y = 0 \]

kovacic, second_order_bessel_ode

[[_2nd_order, _with_linear_symmetries]]

3.445








6622

\[ {}16 x^{2} y^{\prime \prime }+16 x y^{\prime }+\left (16 x^{2}-1\right ) y = 0 \]

second_order_bessel_ode

[[_2nd_order, _with_linear_symmetries]]

2.552








6623

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

second_order_bessel_ode

[_Lienard]

2.19








6624

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

second_order_bessel_ode

[_Bessel]

3.973








6625

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

second_order_bessel_ode

[[_2nd_order, _with_linear_symmetries]]

2.443








6626

\[ {}x^{2} y^{\prime \prime }+x y^{\prime }+\left (36 x^{2}-\frac {1}{4}\right ) y = 0 \]

kovacic, second_order_bessel_ode, second_order_change_of_variable_on_y_method_1

[[_2nd_order, _with_linear_symmetries]]

2.565








6627

\[ {}x^{2} y^{\prime \prime }+x y^{\prime }+\left (25 x^{2}-\frac {4}{9}\right ) y = 0 \]

second_order_bessel_ode

[[_2nd_order, _with_linear_symmetries]]

2.171








6628

\[ {}x^{2} y^{\prime \prime }+x y^{\prime }+\left (2 x^{2}-64\right ) y = 0 \]

second_order_bessel_ode

[[_2nd_order, _with_linear_symmetries]]

2.941








6629

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

second_order_bessel_ode

[[_Emden, _Fowler]]

1.313








6630

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

second_order_bessel_ode

[_Lienard]

2.085








6631

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

second_order_bessel_ode

[_Lienard]

2.316








6632

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

second_order_bessel_ode

[_Lienard]

2.46








6633

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

kovacic, second_order_bessel_ode

[[_2nd_order, _with_linear_symmetries]]

2.976








6634

\[ {}4 x^{2} y^{\prime \prime }+\left (16 x^{2}+1\right ) y = 0 \]

second_order_bessel_ode

[[_2nd_order, _with_linear_symmetries]]

0.57








6635

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

kovacic, second_order_bessel_ode

[[_Emden, _Fowler]]

0.591








6636

\[ {}9 x^{2} y^{\prime \prime }+9 x y^{\prime }+\left (x^{6}-36\right ) y = 0 \]

second_order_bessel_ode

[[_2nd_order, _with_linear_symmetries]]

0.46








6637

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

second_order_bessel_ode

[[_Emden, _Fowler]]

0.303








6638

\[ {}x y^{\prime \prime }+y^{\prime }-7 x^{3} y = 0 \]

second_order_bessel_ode

[[_Emden, _Fowler]]

0.395








6639

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

kovacic, second_order_linear_constant_coeff, second_order_ode_can_be_made_integrable

[[_2nd_order, _missing_x]]

0.682








6640

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

kovacic, second_order_bessel_ode, second_order_change_of_variable_on_y_method_1

[[_2nd_order, _with_linear_symmetries]]

0.8








6641

\[ {}16 x^{2} y^{\prime \prime }+32 x y^{\prime }+\left (x^{4}-12\right ) y = 0 \]

kovacic, second_order_bessel_ode

[[_2nd_order, _with_linear_symmetries]]

0.677








6642

\[ {}4 x^{2} y^{\prime \prime }-4 x y^{\prime }+\left (16 x^{2}+3\right ) y = 0 \]

kovacic, second_order_bessel_ode, second_order_change_of_variable_on_y_method_1

[[_2nd_order, _with_linear_symmetries]]

0.508








6643

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

second order series method. Regular singular point. Difference not integer

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

1.016








6644

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

second order series method. Ordinary point, second order series method. Taylor series method

[[_2nd_order, _exact, _linear, _homogeneous]]

0.452








6645

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

second order series method. Ordinary point, second order series method. Taylor series method

[[_Emden, _Fowler]]

0.828








6646

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

second order series method. Ordinary point, second order series method. Taylor series method

[[_2nd_order, _with_linear_symmetries]]

0.98








6647

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

second order series method. Regular singular point. Difference is integer

[_Laguerre]

1.625








6648

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

second order series method. Ordinary point, second order series method. Taylor series method

[[_2nd_order, _with_linear_symmetries]]

2.129








6649

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

i.c.

second order series method. Ordinary point, second order series method. Taylor series method

[[_2nd_order, _with_linear_symmetries]]

2.398








6650

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

i.c.

second order series method. Ordinary point, second order series method. Taylor series method

[[_Emden, _Fowler]]

1.838








6651

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

second order series method. Ordinary point, second order series method. Taylor series method

[[_2nd_order, _with_linear_symmetries]]

12.342








6652

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

i.c.

second order series method. Ordinary point, second order series method. Taylor series method

[[_2nd_order, _exact, _linear, _homogeneous]]

2.143








6653

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

second order series method. Ordinary point, second order series method. Taylor series method

[[_Emden, _Fowler]]

8.286








6654

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

second order series method. Regular singular point. Difference is integer

[[_2nd_order, _with_linear_symmetries]]

4.122








6655

\[ {}y^{\prime \prime }+x^{2} y^{\prime }+2 x y = 10 x^{3}-2 x +5 \]

second order series method. Ordinary point, second order series method. Taylor series method

[[_2nd_order, _exact, _linear, _nonhomogeneous]]

1.0








6656

\[ {}y^{\prime }-y = 1 \]

i.c.

first_order_laplace

[_quadrature]

0.418








6657

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

i.c.

first_order_laplace

[_quadrature]

0.335








6658

\[ {}y^{\prime }+6 y = {\mathrm e}^{4 t} \]

i.c.

first_order_laplace

[[_linear, ‘class A‘]]

0.526








6659

\[ {}y^{\prime }-y = 2 \cos \left (5 t \right ) \]

i.c.

first_order_laplace

[[_linear, ‘class A‘]]

0.654








6660

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

i.c.

second_order_laplace

[[_2nd_order, _missing_x]]

0.44








6661

\[ {}y^{\prime \prime }-4 y^{\prime } = 6 \,{\mathrm e}^{3 t}-3 \,{\mathrm e}^{-t} \]

i.c.

second_order_laplace

[[_2nd_order, _missing_y]]

0.589








6662

\[ {}y^{\prime \prime }+y = \sqrt {2}\, \sin \left (\sqrt {2}\, t \right ) \]

i.c.

second_order_laplace

[[_2nd_order, _linear, _nonhomogeneous]]

0.984








6663

\[ {}y^{\prime \prime }+9 y = {\mathrm e}^{t} \]

i.c.

second_order_laplace

[[_2nd_order, _with_linear_symmetries]]

0.589








6664

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

i.c.

higher_order_laplace

[[_3rd_order, _with_linear_symmetries]]

1.052








6665

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

i.c.

higher_order_laplace

[[_3rd_order, _linear, _nonhomogeneous]]

1.597








6666

\[ {}y^{\prime }+y = {\mathrm e}^{-3 t} \cos \left (2 t \right ) \]

i.c.

first_order_laplace

[[_linear, ‘class A‘]]

0.837








6667

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

i.c.

second_order_laplace

[[_2nd_order, _missing_x]]

0.471








6668

\[ {}y^{\prime }+4 y = {\mathrm e}^{-4 t} \]

i.c.

first_order_laplace

[[_linear, ‘class A‘]]

0.501








6669

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

i.c.

first_order_laplace

[[_linear, ‘class A‘]]

0.519








6670

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

i.c.

second_order_laplace

[[_2nd_order, _missing_x]]

0.439








6671

\[ {}y^{\prime \prime }-4 y^{\prime }+4 y = t^{3} {\mathrm e}^{2 t} \]

i.c.

second_order_laplace

[[_2nd_order, _linear, _nonhomogeneous]]

0.516








6672

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

i.c.

second_order_laplace

[[_2nd_order, _with_linear_symmetries]]

0.543








6673

\[ {}y^{\prime \prime }-4 y^{\prime }+4 y = t^{3} \]

i.c.

second_order_laplace

[[_2nd_order, _linear, _nonhomogeneous]]

0.547








6674

\[ {}y^{\prime \prime }-6 y^{\prime }+13 y = 0 \]

i.c.

second_order_laplace

[[_2nd_order, _missing_x]]

0.441








6675

\[ {}2 y^{\prime \prime }+20 y^{\prime }+51 y = 0 \]

i.c.

second_order_laplace

[[_2nd_order, _missing_x]]

0.586








6676

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

i.c.

second_order_laplace

[[_2nd_order, _linear, _nonhomogeneous]]

0.731








6677

\[ {}y^{\prime \prime }-2 y^{\prime }+5 y = t +1 \]

i.c.

second_order_laplace

[[_2nd_order, _with_linear_symmetries]]

0.689








6678

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

i.c.

second_order_laplace

[[_2nd_order, _missing_x]]

0.467








6679

\[ {}y^{\prime \prime }+8 y^{\prime }+20 y = 0 \]

i.c.

second_order_laplace

[[_2nd_order, _missing_x]]

0.286








6680

\[ {}y^{\prime }+y = \left \{\begin {array}{cc} 0 & 0\le t <1 \\ 5 & 1\le t \end {array}\right . \]

i.c.

first_order_laplace

[[_linear, ‘class A‘]]

0.691








6681

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

i.c.

first_order_laplace

[[_linear, ‘class A‘]]

0.87








6682

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

i.c.

first_order_laplace

[[_linear, ‘class A‘]]

0.791








6683

\[ {}y^{\prime \prime }+4 y = \left \{\begin {array}{cc} 1 & 0\le t <1 \\ 0 & 1\le t \end {array}\right . \]

i.c.

second_order_laplace

[[_2nd_order, _linear, _nonhomogeneous]]

1.783








6684

\[ {}y^{\prime \prime }+4 y = \sin \left (t \right ) \operatorname {Heaviside}\left (t -2 \pi \right ) \]

i.c.

second_order_laplace

[[_2nd_order, _linear, _nonhomogeneous]]

1.107








6685

\[ {}y^{\prime \prime }-5 y^{\prime }+6 y = \operatorname {Heaviside}\left (-1+t \right ) \]

i.c.

second_order_laplace

[[_2nd_order, _linear, _nonhomogeneous]]

0.99








6686

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

i.c.

second_order_laplace

[[_2nd_order, _linear, _nonhomogeneous]]

1.503








6687

\[ {}y^{\prime \prime }+4 y^{\prime }+3 y = 1-\operatorname {Heaviside}\left (t -2\right )-\operatorname {Heaviside}\left (t -4\right )+\operatorname {Heaviside}\left (t -6\right ) \]

i.c.

second_order_laplace

[[_2nd_order, _linear, _nonhomogeneous]]

2.454








6688

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

i.c.

first_order_laplace

[[_linear, ‘class A‘]]

0.716








6689

\[ {}y^{\prime }-y = t \,{\mathrm e}^{t} \sin \left (t \right ) \]

i.c.

first_order_laplace

[[_linear, ‘class A‘]]

0.717








6690

\[ {}y^{\prime \prime }+9 y = \cos \left (3 t \right ) \]

i.c.

second_order_laplace

[[_2nd_order, _linear, _nonhomogeneous]]

0.723








6691

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

i.c.

second_order_laplace

[[_2nd_order, _linear, _nonhomogeneous]]

0.665








6692

\[ {}y^{\prime \prime }+16 y = \left \{\begin {array}{cc} \cos \left (4 t \right ) & 0\le t <\pi \\ 0 & \pi \le t \end {array}\right . \]

i.c.

second_order_laplace

[[_2nd_order, _linear, _nonhomogeneous]]

1.734








6693

\[ {}y^{\prime \prime }+y = \left \{\begin {array}{cc} 1 & 0\le t <\frac {\pi }{2} \\ \sin \left (t \right ) & \frac {\pi }{2}\le t \end {array}\right . \]

i.c.

second_order_laplace

[[_2nd_order, _linear, _nonhomogeneous]]

1.712








6694

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

i.c.

kovacic, exact linear second order ode, second_order_integrable_as_is, second_order_ode_missing_y, second_order_ode_non_constant_coeff_transformation_on_B

[[_2nd_order, _missing_y]]

2.659








6695

\[ {}2 y^{\prime \prime }+t y^{\prime }-2 y = 10 \]

i.c.

kovacic

[[_2nd_order, _with_linear_symmetries]]

N/A

1.484








6696

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

i.c.

second_order_laplace

[[_2nd_order, _linear, _nonhomogeneous]]

0.809








6697

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

i.c.

first_order_laplace

[[_linear, ‘class A‘]]

0.638








6698

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

i.c.

first_order_laplace

[[_linear, ‘class A‘]]

0.637








6699

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

i.c.

second_order_laplace

[[_2nd_order, _linear, _nonhomogeneous]]

0.537








6700

\[ {}y^{\prime \prime }+16 y = \delta \left (t -2 \pi \right ) \]

i.c.

second_order_laplace

[[_2nd_order, _linear, _nonhomogeneous]]

0.519