2.2.21 Problems 2001 to 2100

Table 2.43: Main lookup table. Sorted sequentially by problem number.

#

ODE

CAS classification

Solved?

time (sec)

2001

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

[[_2nd_order, _with_linear_symmetries]]

0.556

2002

\[ {}x^{2} y^{\prime \prime }-x \left (5-x \right ) y^{\prime }+\left (9-4 x \right ) y = 0 \]

[[_2nd_order, _with_linear_symmetries]]

0.568

2003

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

[[_2nd_order, _with_linear_symmetries]]

1.342

2004

\[ {}x^{2} \left (2 x^{2}+x +1\right ) y^{\prime \prime }+x \left (7 x^{2}+6 x +3\right ) y^{\prime }+\left (-3 x^{2}+6 x +1\right ) y = 0 \]

[[_2nd_order, _exact, _linear, _homogeneous]]

0.802

2005

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

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

0.810

2006

\[ {}4 x^{2} \left (x^{2}+x +1\right ) y^{\prime \prime }+12 x^{2} \left (x +1\right ) y^{\prime }+\left (3 x^{2}+3 x +1\right ) y = 0 \]

[[_2nd_order, _with_linear_symmetries]]

1.452

2007

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

[[_2nd_order, _with_linear_symmetries]]

0.767

2008

\[ {}9 x^{2} y^{\prime \prime }+3 x \left (-2 x^{2}+3 x +5\right ) y^{\prime }+\left (-14 x^{2}+12 x +1\right ) y = 0 \]

[[_2nd_order, _with_linear_symmetries]]

1.481

2009

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

[[_2nd_order, _with_linear_symmetries]]

0.823

2010

\[ {}x^{2} \left (2 x +1\right ) y^{\prime \prime }+x \left (3 x^{2}+14 x +5\right ) y^{\prime }+\left (12 x^{2}+18 x +4\right ) y = 0 \]

[[_2nd_order, _with_linear_symmetries]]

0.772

2011

\[ {}4 x^{2} y^{\prime \prime }+2 x \left (x^{2}+x +4\right ) y^{\prime }+\left (3 x^{2}+5 x +1\right ) y = 0 \]

[[_2nd_order, _with_linear_symmetries]]

0.857

2012

\[ {}16 x^{2} y^{\prime \prime }+4 x \left (2 x^{2}+x +6\right ) y^{\prime }+\left (18 x^{2}+5 x +1\right ) y = 0 \]

[[_2nd_order, _with_linear_symmetries]]

0.767

2013

\[ {}9 x^{2} \left (x +1\right ) y^{\prime \prime }+3 x \left (-x^{2}+11 x +5\right ) y^{\prime }+\left (-7 x^{2}+16 x +1\right ) y = 0 \]

[[_2nd_order, _with_linear_symmetries]]

1.372

2014

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

[[_2nd_order, _with_linear_symmetries]]

1.220

2015

\[ {}36 x^{2} \left (1-2 x \right ) y^{\prime \prime }+24 x \left (1-9 x \right ) y^{\prime }+\left (1-70 x \right ) y = 0 \]

[[_2nd_order, _with_linear_symmetries]]

0.636

2016

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

[[_2nd_order, _with_linear_symmetries]]

1.195

2017

\[ {}x^{2} \left (1-2 x \right ) y^{\prime \prime }-x \left (5-4 x \right ) y^{\prime }+\left (9-4 x \right ) y = 0 \]

[[_2nd_order, _with_linear_symmetries]]

0.617

2018

\[ {}25 x^{2} y^{\prime \prime }+x \left (15+x \right ) y^{\prime }+\left (x +1\right ) y = 0 \]

[[_2nd_order, _with_linear_symmetries]]

1.265

2019

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

[[_2nd_order, _with_linear_symmetries]]

0.623

2020

\[ {}x^{2} \left (9+4 x \right ) y^{\prime \prime }+3 y^{\prime } x +\left (x +1\right ) y = 0 \]

[[_2nd_order, _with_linear_symmetries]]

1.274

2021

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

[[_2nd_order, _with_linear_symmetries]]

0.647

2022

\[ {}x^{2} \left (1-4 x \right ) y^{\prime \prime }+3 x \left (1-6 x \right ) y^{\prime }+\left (1-12 x \right ) y = 0 \]

[[_2nd_order, _exact, _linear, _homogeneous]]

1.276

2023

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

[[_2nd_order, _exact, _linear, _homogeneous]]

0.613

2024

\[ {}2 x^{2} \left (x +1\right ) y^{\prime \prime }-x \left (6-x \right ) y^{\prime }+\left (8-x \right ) y = 0 \]

[[_2nd_order, _with_linear_symmetries]]

0.604

2025

\[ {}x^{2} \left (2 x +1\right ) y^{\prime \prime }+x \left (5+9 x \right ) y^{\prime }+\left (4+3 x \right ) y = 0 \]

[[_2nd_order, _with_linear_symmetries]]

0.758

2026

\[ {}x^{2} \left (1-2 x \right ) y^{\prime \prime }-x \left (5+4 x \right ) y^{\prime }+\left (9+4 x \right ) y = 0 \]

[[_2nd_order, _with_linear_symmetries]]

1.389

2027

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

[[_2nd_order, _with_linear_symmetries]]

0.839

2028

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

[[_2nd_order, _with_linear_symmetries]]

1.453

2029

\[ {}x^{2} \left (1-x \right ) y^{\prime \prime }+x \left (7+x \right ) y^{\prime }+\left (9-x \right ) y = 0 \]

[[_2nd_order, _with_linear_symmetries]]

0.750

2030

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

[[_2nd_order, _with_linear_symmetries]]

0.510

2031

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

[[_2nd_order, _with_linear_symmetries]]

0.474

2032

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

[[_2nd_order, _with_linear_symmetries]]

1.158

2033

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

[[_2nd_order, _with_linear_symmetries]]

0.485

2034

\[ {}2 x^{2} \left (x^{2}+2\right ) y^{\prime \prime }+7 x^{3} y^{\prime }+\left (3 x^{2}+1\right ) y = 0 \]

[[_2nd_order, _with_linear_symmetries]]

0.502

2035

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

[[_2nd_order, _with_linear_symmetries]]

0.565

2036

\[ {}4 x^{2} \left (x^{2}+4\right ) y^{\prime \prime }+3 x \left (3 x^{2}+8\right ) y^{\prime }+\left (-9 x^{2}+1\right ) y = 0 \]

[[_2nd_order, _with_linear_symmetries]]

0.545

2037

\[ {}3 x^{2} \left (x^{2}+3\right ) y^{\prime \prime }+x \left (11 x^{2}+3\right ) y^{\prime }+\left (5 x^{2}+1\right ) y = 0 \]

[[_2nd_order, _with_linear_symmetries]]

0.566

2038

\[ {}4 x^{2} \left (4 x^{2}+1\right ) y^{\prime \prime }+32 x^{3} y^{\prime }+y = 0 \]

[[_2nd_order, _with_linear_symmetries]]

0.583

2039

\[ {}9 x^{2} y^{\prime \prime }-3 x \left (-2 x^{2}+7\right ) y^{\prime }+\left (2 x^{2}+25\right ) y = 0 \]

[[_2nd_order, _with_linear_symmetries]]

0.542

2040

\[ {}x^{2} \left (2 x^{2}+1\right ) y^{\prime \prime }+x \left (7 x^{2}+3\right ) y^{\prime }+\left (-3 x^{2}+1\right ) y = 0 \]

[[_2nd_order, _exact, _linear, _homogeneous]]

0.528

2041

\[ {}x^{2} \left (x^{2}+1\right ) y^{\prime \prime }+x \left (8 x^{2}+3\right ) y^{\prime }+\left (12 x^{2}+1\right ) y = 0 \]

[[_2nd_order, _exact, _linear, _homogeneous]]

1.293

2042

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

[[_2nd_order, _with_linear_symmetries]]

0.473

2043

\[ {}x^{2} \left (-2 x^{2}+1\right ) y^{\prime \prime }+x \left (-9 x^{2}+5\right ) y^{\prime }+\left (-3 x^{2}+4\right ) y = 0 \]

[[_2nd_order, _with_linear_symmetries]]

0.529

2044

\[ {}x^{2} \left (x^{2}+2\right ) y^{\prime \prime }+x \left (-x^{2}+14\right ) y^{\prime }+2 \left (x^{2}+9\right ) y = 0 \]

[[_2nd_order, _with_linear_symmetries]]

0.644

2045

\[ {}x^{2} \left (x^{2}+1\right ) y^{\prime \prime }+x \left (7 x^{2}+3\right ) y^{\prime }+\left (8 x^{2}+1\right ) y = 0 \]

[[_2nd_order, _with_linear_symmetries]]

1.197

2046

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

[[_2nd_order, _with_linear_symmetries]]

0.609

2047

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

[[_2nd_order, _with_linear_symmetries]]

1.300

2048

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

[[_2nd_order, _exact, _linear, _homogeneous]]

0.674

2049

\[ {}4 x^{2} \left (x +1\right ) y^{\prime \prime }+4 x^{2} y^{\prime }+\left (1-5 x \right ) y = 0 \]

[[_2nd_order, _with_linear_symmetries]]

0.755

2050

\[ {}x^{2} \left (1-x \right ) y^{\prime \prime }-x \left (3-5 x \right ) y^{\prime }+\left (4-5 x \right ) y = 0 \]

[[_2nd_order, _with_linear_symmetries]]

0.591

2051

\[ {}x^{2} \left (x^{2}+1\right ) y^{\prime \prime }-x \left (9 x^{2}+1\right ) y^{\prime }+\left (25 x^{2}+1\right ) y = 0 \]

[[_2nd_order, _with_linear_symmetries]]

0.531

2052

\[ {}9 x^{2} y^{\prime \prime }+3 x \left (-x^{2}+1\right ) y^{\prime }+\left (7 x^{2}+1\right ) y = 0 \]

[[_2nd_order, _with_linear_symmetries]]

0.569

2053

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

[[_2nd_order, _exact, _linear, _homogeneous]]

0.496

2054

\[ {}4 x^{2} y^{\prime \prime }+2 x \left (-x^{2}+4\right ) y^{\prime }+\left (7 x^{2}+1\right ) y = 0 \]

[[_2nd_order, _with_linear_symmetries]]

1.243

2055

\[ {}4 x^{2} \left (x +1\right ) y^{\prime \prime }+8 x^{2} y^{\prime }+\left (x +1\right ) y = 0 \]

[[_2nd_order, _with_linear_symmetries]]

0.474

2056

\[ {}9 x^{2} \left (x +3\right ) y^{\prime \prime }+3 x \left (3+7 x \right ) y^{\prime }+\left (3+4 x \right ) y = 0 \]

[[_2nd_order, _with_linear_symmetries]]

1.115

2057

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

[[_2nd_order, _with_linear_symmetries]]

0.492

2058

\[ {}16 x^{2} \left (x^{2}+1\right ) y^{\prime \prime }+8 x \left (9 x^{2}+1\right ) y^{\prime }+\left (49 x^{2}+1\right ) y = 0 \]

[[_2nd_order, _with_linear_symmetries]]

0.487

2059

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

[[_2nd_order, _with_linear_symmetries]]

1.136

2060

\[ {}4 x^{2} \left (x^{2}+3 x +1\right ) y^{\prime \prime }+8 x^{2} \left (2 x +3\right ) y^{\prime }+\left (9 x^{2}+3 x +1\right ) y = 0 \]

[[_2nd_order, _with_linear_symmetries]]

0.568

2061

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

[[_2nd_order, _with_linear_symmetries]]

1.171

2062

\[ {}9 x^{2} \left (x^{2}+x +1\right ) y^{\prime \prime }+3 x \left (13 x^{2}+7 x +1\right ) y^{\prime }+\left (25 x^{2}+4 x +1\right ) y = 0 \]

[[_2nd_order, _with_linear_symmetries]]

0.569

2063

\[ {}2 x^{2} \left (x +2\right ) y^{\prime \prime }-x \left (4-7 x \right ) y^{\prime }-\left (5-3 x \right ) y = 0 \]

[[_2nd_order, _with_linear_symmetries]]

2.222

2064

\[ {}x^{2} \left (1-2 x \right ) y^{\prime \prime }+x \left (8-9 x \right ) y^{\prime }+\left (6-3 x \right ) y = 0 \]

[[_2nd_order, _with_linear_symmetries]]

1.403

2065

\[ {}x^{2} \left (x^{2}+1\right ) y^{\prime \prime }+x \left (10 x^{2}+3\right ) y^{\prime }-\left (-14 x^{2}+15\right ) y = 0 \]

[[_2nd_order, _with_linear_symmetries]]

2.127

2066

\[ {}x^{2} \left (-2 x^{2}+1\right ) y^{\prime \prime }+x \left (-13 x^{2}+7\right ) y^{\prime }-14 x^{2} y = 0 \]

[[_2nd_order, _with_linear_symmetries]]

0.656

2067

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

[[_2nd_order, _with_linear_symmetries]]

1.294

2068

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

[[_Emden, _Fowler]]

1.734

2069

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

[[_2nd_order, _with_linear_symmetries]]

2.052

2070

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

[[_2nd_order, _with_linear_symmetries]]

2.033

2071

\[ {}2 x^{2} \left (3 x +2\right ) y^{\prime \prime }+x \left (4+21 x \right ) y^{\prime }-\left (1-9 x \right ) y = 0 \]

[[_2nd_order, _with_linear_symmetries]]

2.102

2072

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

[[_2nd_order, _with_linear_symmetries]]

1.946

2073

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

[[_2nd_order, _with_linear_symmetries]]

1.887

2074

\[ {}x^{2} y^{\prime \prime }+10 y^{\prime } x +\left (14+x \right ) y = 0 \]

[[_2nd_order, _with_linear_symmetries]]

1.885

2075

\[ {}4 x^{2} \left (x +1\right ) y^{\prime \prime }+4 x \left (3+8 x \right ) y^{\prime }-\left (5-49 x \right ) y = 0 \]

[[_2nd_order, _with_linear_symmetries]]

2.134

2076

\[ {}x^{2} \left (x +1\right ) y^{\prime \prime }-x \left (3+10 x \right ) y^{\prime }+30 y x = 0 \]

[[_2nd_order, _with_linear_symmetries]]

2.058

2077

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

[[_2nd_order, _with_linear_symmetries]]

1.373

2078

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

[[_2nd_order, _with_linear_symmetries]]

1.356

2079

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

[[_2nd_order, _exact, _linear, _homogeneous]]

0.661

2080

\[ {}x^{2} \left (2 x +1\right ) y^{\prime \prime }+x \left (9+13 x \right ) y^{\prime }+\left (7+5 x \right ) y = 0 \]

[[_2nd_order, _with_linear_symmetries]]

1.632

2081

\[ {}4 x^{2} \left (2 x +1\right ) y^{\prime \prime }-2 x \left (4-x \right ) y^{\prime }-\left (7+5 x \right ) y = 0 \]

[[_2nd_order, _with_linear_symmetries]]

0.823

2082

\[ {}3 x^{2} \left (x +3\right ) y^{\prime \prime }-x \left (15+x \right ) y^{\prime }-20 y = 0 \]

[[_2nd_order, _with_linear_symmetries]]

1.407

2083

\[ {}x^{2} \left (x +1\right ) y^{\prime \prime }+x \left (1-10 x \right ) y^{\prime }-\left (9-10 x \right ) y = 0 \]

[[_2nd_order, _with_linear_symmetries]]

1.511

2084

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

[[_2nd_order, _with_linear_symmetries]]

0.785

2085

\[ {}x^{2} \left (2 x +1\right ) y^{\prime \prime }-2 x \left (3+14 x \right ) y^{\prime }+\left (6+100 x \right ) y = 0 \]

[[_2nd_order, _with_linear_symmetries]]

1.394

2086

\[ {}x^{2} \left (x +1\right ) y^{\prime \prime }-x \left (6+11 x \right ) y^{\prime }+\left (6+32 x \right ) y = 0 \]

[[_2nd_order, _with_linear_symmetries]]

1.450

2087

\[ {}4 x^{2} \left (x +1\right ) y^{\prime \prime }+4 x \left (1+4 x \right ) y^{\prime }-\left (49+27 x \right ) y = 0 \]

[[_2nd_order, _with_linear_symmetries]]

0.842

2088

\[ {}x^{2} \left (2 x +1\right ) y^{\prime \prime }-x \left (9+8 x \right ) y^{\prime }-12 y x = 0 \]

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

1.870

2089

\[ {}x^{2} \left (x^{2}+1\right ) y^{\prime \prime }-x \left (-2 x^{2}+7\right ) y^{\prime }+12 y = 0 \]

[[_2nd_order, _with_linear_symmetries]]

1.977

2090

\[ {}x^{2} y^{\prime \prime }-x \left (-x^{2}+7\right ) y^{\prime }+12 y = 0 \]

[[_2nd_order, _with_linear_symmetries]]

1.873

2091

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

[_Lienard]

1.886

2092

\[ {}x^{2} y^{\prime \prime }+x \left (2 x^{2}+1\right ) y^{\prime }-\left (-10 x^{2}+1\right ) y = 0 \]

[[_2nd_order, _with_linear_symmetries]]

1.917

2093

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

[[_2nd_order, _with_linear_symmetries]]

1.828

2094

\[ {}4 x^{2} y^{\prime \prime }+2 x \left (x^{2}+8\right ) y^{\prime }+\left (3 x^{2}+5\right ) y = 0 \]

[[_2nd_order, _with_linear_symmetries]]

1.968

2095

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

[[_2nd_order, _exact, _linear, _homogeneous]]

1.929

2096

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

[[_2nd_order, _with_linear_symmetries]]

1.848

2097

\[ {}4 x^{2} y^{\prime \prime }+8 y^{\prime } x -\left (-x^{2}+35\right ) y = 0 \]

[[_2nd_order, _with_linear_symmetries]]

1.914

2098

\[ {}9 x^{2} y^{\prime \prime }-3 x \left (2 x^{2}+11\right ) y^{\prime }+\left (10 x^{2}+13\right ) y = 0 \]

[[_2nd_order, _with_linear_symmetries]]

2.081

2099

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

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

1.960

2100

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

[[_2nd_order, _with_linear_symmetries]]

1.265