2.2.5 Problems 401 to 500

Table 2.11: Main lookup table. Sorted sequentially by problem number.

#

ODE

CAS classification

Solved?

time (sec)

401

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

[_quadrature]

0.366

402

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

[_quadrature]

0.377

403

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

[_separable]

0.371

404

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

[_separable]

0.322

405

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

[_separable]

0.404

406

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

[_separable]

0.426

407

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

[_separable]

0.406

408

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

[_separable]

0.950

409

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

[_separable]

0.438

410

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

[[_2nd_order, _missing_x]]

0.313

411

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

[[_2nd_order, _missing_x]]

0.351

412

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

[[_2nd_order, _missing_x]]

0.406

413

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

[[_2nd_order, _with_linear_symmetries]]

0.357

414

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

[_separable]

0.430

415

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

[_separable]

0.280

416

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

[_separable]

0.036

417

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

[_separable]

0.058

418

\[ {}y^{\prime \prime }+4 y = 0 \]
i.c.

[[_2nd_order, _missing_x]]

0.349

419

\[ {}y^{\prime \prime }-4 y = 0 \]
i.c.

[[_2nd_order, _missing_x]]

0.318

420

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

[[_2nd_order, _missing_x]]

0.392

421

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

[[_2nd_order, _missing_x]]

0.905

422

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

[[_2nd_order, _with_linear_symmetries]]

0.894

423

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

[[_2nd_order, _missing_x]]

0.400

424

\[ {}y^{\prime } = 1+y^{2} \]
i.c.

[_quadrature]

0.233

425

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

[[_3rd_order, _missing_x]]

0.129

426

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

[[_2nd_order, _exact, _linear, _homogeneous]]

0.372

427

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

[[_2nd_order, _exact, _linear, _homogeneous]]

0.403

428

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

[[_2nd_order, _exact, _linear, _homogeneous]]

0.291

429

\[ {}\left (x^{2}+1\right ) y^{\prime \prime }+6 y^{\prime } x +4 y = 0 \]

[[_2nd_order, _exact, _linear, _homogeneous]]

0.391

430

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

[[_2nd_order, _missing_y]]

0.298

431

\[ {}\left (x^{2}-1\right ) y^{\prime \prime }-6 y^{\prime } x +12 y = 0 \]

[_Gegenbauer]

0.811

432

\[ {}\left (x^{2}+3\right ) y^{\prime \prime }-7 y^{\prime } x +16 y = 0 \]

[[_2nd_order, _with_linear_symmetries]]

0.359

433

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

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

0.366

434

\[ {}\left (x^{2}-1\right ) y^{\prime \prime }+8 y^{\prime } x +12 y = 0 \]

[_Gegenbauer]

0.405

435

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

[[_2nd_order, _with_linear_symmetries]]

0.324

436

\[ {}5 y^{\prime \prime }-2 y^{\prime } x +10 y = 0 \]

[[_2nd_order, _with_linear_symmetries]]

0.342

437

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

[[_2nd_order, _with_linear_symmetries]]

0.303

438

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

[[_2nd_order, _exact, _linear, _homogeneous]]

0.298

439

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

[[_Emden, _Fowler]]

0.321

440

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

[[_Emden, _Fowler]]

0.877

441

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

[[_2nd_order, _with_linear_symmetries]]

0.303

442

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

[[_2nd_order, _with_linear_symmetries]]

0.235

443

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

[[_2nd_order, _exact, _linear, _homogeneous]]

0.304

444

\[ {}\left (-x^{2}+2 x \right ) y^{\prime \prime }-6 \left (x -1\right ) y^{\prime }-4 y = 0 \]
i.c.

[[_2nd_order, _exact, _linear, _homogeneous]]

0.416

445

\[ {}\left (x^{2}-6 x +10\right ) y^{\prime \prime }-4 \left (x -3\right ) y^{\prime }+6 y = 0 \]
i.c.

[[_2nd_order, _with_linear_symmetries]]

0.308

446

\[ {}\left (4 x^{2}+16 x +17\right ) y^{\prime \prime } = 8 y \]
i.c.

[[_2nd_order, _exact, _linear, _homogeneous]]

0.354

447

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

[[_2nd_order, _with_linear_symmetries]]

0.361

448

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

[[_2nd_order, _with_linear_symmetries]]

0.383

449

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

[[_2nd_order, _with_linear_symmetries]]

1.019

450

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

[[_2nd_order, _with_linear_symmetries]]

0.326

451

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

[[_2nd_order, _with_linear_symmetries]]

0.322

452

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

[[_2nd_order, _with_linear_symmetries]]

0.342

453

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

[[_2nd_order, _with_linear_symmetries]]

0.533

454

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

[[_2nd_order, _with_linear_symmetries]]

0.648

455

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

[_Lienard]

2.244

456

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

[[_2nd_order, _with_linear_symmetries]]

0.420

457

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

[[_2nd_order, _with_linear_symmetries]]

2.216

458

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

[[_2nd_order, _with_linear_symmetries]]

0.731

459

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

[[_2nd_order, _with_linear_symmetries]]

0.741

460

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

[[_2nd_order, _with_linear_symmetries]]

0.094

461

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

[[_Emden, _Fowler]]

1.929

462

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

[[_2nd_order, _with_linear_symmetries]]

1.106

463

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

[[_2nd_order, _with_linear_symmetries]]

0.961

464

\[ {}\left (2 x^{3}+6 x^{2}\right ) y^{\prime \prime }+21 y^{\prime } x +9 \left (x^{2}-1\right ) y = 0 \]

[[_2nd_order, _with_linear_symmetries]]

0.705

465

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

[[_2nd_order, _with_linear_symmetries]]

0.490

466

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

[[_2nd_order, _with_linear_symmetries]]

0.537

467

\[ {}\left (-x^{2}+1\right ) y^{\prime \prime }-2 y^{\prime } x +12 y = 0 \]

[_Gegenbauer]

0.451

468

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

[[_2nd_order, _with_linear_symmetries]]

0.568

469

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

[[_2nd_order, _with_linear_symmetries]]

0.587

470

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

[[_2nd_order, _with_linear_symmetries]]

0.763

471

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

[[_2nd_order, _with_linear_symmetries]]

0.610

472

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

[[_2nd_order, _with_linear_symmetries]]

0.140

473

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

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

0.483

474

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

[[_Emden, _Fowler]]

1.497

475

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

[[_Emden, _Fowler]]

1.206

476

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

[[_Emden, _Fowler]]

0.786

477

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

[[_2nd_order, _with_linear_symmetries]]

0.421

478

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

[[_2nd_order, _with_linear_symmetries]]

0.416

479

\[ {}6 x^{2} y^{\prime \prime }+7 y^{\prime } x -\left (x^{2}+2\right ) y = 0 \]

[[_2nd_order, _with_linear_symmetries]]

0.479

480

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

[[_2nd_order, _with_linear_symmetries]]

0.410

481

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

[[_2nd_order, _exact, _linear, _homogeneous]]

0.564

482

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

[[_2nd_order, _exact, _linear, _homogeneous]]

0.516

483

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

[[_2nd_order, _with_linear_symmetries]]

0.563

484

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

[[_2nd_order, _with_linear_symmetries]]

0.552

485

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

[[_2nd_order, _with_linear_symmetries]]

0.619

486

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

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

1.080

487

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

[[_2nd_order, _with_linear_symmetries]]

0.665

488

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

[[_2nd_order, _with_linear_symmetries]]

0.519

489

\[ {}\left (5 x^{3}+2 x^{2}\right ) y^{\prime \prime }+\left (-x^{2}+3 x \right ) y^{\prime }-\left (x +1\right ) y = 0 \]

[[_2nd_order, _with_linear_symmetries]]

0.541

490

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

[[_2nd_order, _with_linear_symmetries]]

0.631

491

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

[[_2nd_order, _exact, _linear, _homogeneous]]

0.155

492

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

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

0.071

493

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

[[_2nd_order, _with_linear_symmetries]]

0.437

494

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

[_Bessel]

3.816

495

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

[[_2nd_order, _with_linear_symmetries]]

0.780

496

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

[[_2nd_order, _with_linear_symmetries]]

3.167

497

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

[_Jacobi]

1.997

498

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

[[_2nd_order, _exact, _linear, _homogeneous]]

0.583

499

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

[[_2nd_order, _exact, _linear, _homogeneous]]

1.475

500

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

[[_2nd_order, _exact, _linear, _homogeneous]]

0.501