2.2.131 Problems 13001 to 13100

Table 2.279: Main lookup table. Sorted sequentially by problem number.

#

ODE

CAS classification

Solved?

Maple

Mma

Sympy

time(sec)

13001

\begin{align*} 2 \left (1-y\right ) y y^{\prime \prime }-\left (1-2 y\right ) {y^{\prime }}^{2}+f \left (x \right ) \left (1-y\right ) y y^{\prime }&=0 \\ \end{align*}

[_Liouville, [_2nd_order, _reducible, _mu_x_y1], [_2nd_order, _reducible, _mu_xy]]

47.070

13002

\begin{align*} 2 \left (1-y\right ) y y^{\prime \prime }-\left (1-3 y\right ) {y^{\prime }}^{2}+h \left (y\right )&=0 \\ \end{align*}

[[_2nd_order, _missing_x]]

2.626

13003

\begin{align*} 3 \left (1-y\right ) y y^{\prime \prime }-2 \left (1-2 y\right ) {y^{\prime }}^{2}-h \left (y\right )&=0 \\ \end{align*}

[[_2nd_order, _missing_x]]

2.584

13004

\begin{align*} \left (1-y\right ) y^{\prime \prime }-3 \left (1-2 y\right ) {y^{\prime }}^{2}-h \left (y\right )&=0 \\ \end{align*}

[[_2nd_order, _missing_x]]

2.864

13005

\begin{align*} a y \left (-1+y\right ) y^{\prime \prime }+\left (b y+c \right ) {y^{\prime }}^{2}+h \left (y\right )&=0 \\ \end{align*}

[[_2nd_order, _missing_x]]

5.194

13006

\begin{align*} a y \left (-1+y\right ) y^{\prime \prime }-\left (-1+a \right ) \left (-1+2 y\right ) {y^{\prime }}^{2}+f y \left (-1+y\right ) y^{\prime }&=0 \\ \end{align*}

[[_2nd_order, _missing_x], _Liouville, [_2nd_order, _reducible, _mu_x_y1], [_2nd_order, _reducible, _mu_xy]]

0.599

13007

\begin{align*} a b y \left (-1+y\right ) y^{\prime \prime }-\left (\left (2 a b -a -b \right ) y+\left (1-a \right ) b \right ) {y^{\prime }}^{2}+f y \left (-1+y\right ) y^{\prime }&=0 \\ \end{align*}

[[_2nd_order, _missing_x], _Liouville, [_2nd_order, _reducible, _mu_x_y1], [_2nd_order, _reducible, _mu_xy]]

0.663

13008

\begin{align*} x y^{2} y^{\prime \prime }-a&=0 \\ \end{align*}

[[_Emden, _Fowler], [_2nd_order, _with_linear_symmetries]]

4.533

13009

\begin{align*} \left (a^{2}-x^{2}\right ) \left (a^{2}-y^{2}\right ) y^{\prime \prime }+\left (a^{2}-x^{2}\right ) y {y^{\prime }}^{2}-x \left (a^{2}-y^{2}\right ) y^{\prime }&=0 \\ \end{align*}

[_Liouville, [_2nd_order, _reducible, _mu_x_y1], [_2nd_order, _reducible, _mu_xy]]

35.170

13010

\begin{align*} 2 x^{2} y \left (-1+y\right ) y^{\prime \prime }-x^{2} \left (3 y-1\right ) {y^{\prime }}^{2}+2 x y \left (-1+y\right ) y^{\prime }+\left (a y^{2}+b \right ) \left (-1+y\right )^{3}+c x y^{2} \left (-1+y\right )+d \,x^{2} y^{2} \left (1+y\right )&=0 \\ \end{align*}

[[_Painleve, ‘5th‘]]

53.074

13011

\begin{align*} \left (x +y\right ) \left (-y+y^{\prime } x \right )^{3}+x^{3} y^{2} y^{\prime \prime }&=0 \\ \end{align*}

[[_2nd_order, _with_linear_symmetries]]

17.924

13012

\begin{align*} y^{3} y^{\prime \prime }-a&=0 \\ \end{align*}

[[_2nd_order, _missing_x], [_2nd_order, _reducible, _mu_x_y1]]

2.493

13013

\begin{align*} \left (1-3 y^{2}\right ) {y^{\prime }}^{2}+y \left (1+y^{2}\right ) y^{\prime \prime }&=0 \\ \end{align*}

[[_2nd_order, _missing_x], _Liouville, [_2nd_order, _reducible, _mu_x_y1], [_2nd_order, _reducible, _mu_xy]]

1.838

13014

\begin{align*} 2 y^{3} y^{\prime \prime }+y^{4}-a^{2} x y^{2}-1&=0 \\ \end{align*}

[NONE]

1.102

13015

\begin{align*} 2 y^{3} y^{\prime \prime }+y^{2} {y^{\prime }}^{2}-a \,x^{2}-b x -c&=0 \\ \end{align*}

[NONE]

1.194

13016

\begin{align*} 2 \left (y-a \right ) \left (y-b \right ) \left (y-c \right ) y^{\prime \prime }-\left (\left (y-a \right )^{2} \left (y-b \right ) \left (y-c \right )+\left (y-b \right ) \left (y-c \right )\right ) {y^{\prime }}^{2}+\left (y-a \right )^{2} \left (y-b \right )^{2} \left (y-c \right )^{2} \left (A_{0} +\frac {B_{0}}{\left (y-a \right )^{2}}+\frac {C_{1}}{\left (y-b \right )^{2}}+\frac {D_{0}}{\left (y-c \right )^{2}}\right )&=0 \\ \end{align*}

[[_2nd_order, _missing_x]]

8.142

13017

\begin{align*} \left (4 y^{3}-a y-b \right ) y^{\prime \prime }-\left (6 y^{2}-\frac {a}{2}\right ) {y^{\prime }}^{2}&=0 \\ \end{align*}

[[_2nd_order, _missing_x], _Liouville, [_2nd_order, _reducible, _mu_x_y1], [_2nd_order, _reducible, _mu_xy]]

0.753

13018

\begin{align*} \left (4 y^{3}-a y-b \right ) \left (y^{\prime \prime }+f y^{\prime }\right )-\left (6 y^{2}-\frac {a}{2}\right ) {y^{\prime }}^{2}&=0 \\ \end{align*}

[[_2nd_order, _missing_x], _Liouville, [_2nd_order, _reducible, _mu_x_y1], [_2nd_order, _reducible, _mu_xy]]

1.198

13019

\begin{align*} \left (-1+y^{2}\right ) \left (y^{2} a^{2}-1\right ) y^{\prime \prime }+b \sqrt {\left (1-y^{2}\right ) \left (1-y^{2} a^{2}\right )}\, {y^{\prime }}^{2}+\left (1+a^{2}-2 y^{2} a^{2}\right ) y {y^{\prime }}^{2}&=0 \\ \end{align*}

[[_2nd_order, _missing_x], _Liouville, [_2nd_order, _reducible, _mu_x_y1], [_2nd_order, _reducible, _mu_xy]]

4.458

13020

\begin{align*} \left (c +2 b x +a \,x^{2}+y^{2}\right )^{2} y^{\prime \prime }+d y&=0 \\ \end{align*}

[NONE]

1.693

13021

\begin{align*} \sqrt {y}\, y^{\prime \prime }-a&=0 \\ \end{align*}

[[_2nd_order, _missing_x], [_2nd_order, _reducible, _mu_x_y1]]

1.479

13022

\begin{align*} \sqrt {x^{2}+y^{2}}\, y^{\prime \prime }-a \left (1+{y^{\prime }}^{2}\right )^{{3}/{2}}&=0 \\ \end{align*}

[[_2nd_order, _with_linear_symmetries]]

47.503

13023

\begin{align*} \left (1+\ln \left (y\right )\right ) {y^{\prime }}^{2}+\left (1-\ln \left (y\right )\right ) y y^{\prime \prime }&=0 \\ \end{align*}

[[_2nd_order, _missing_x], _Liouville, [_2nd_order, _reducible, _mu_x_y1], [_2nd_order, _reducible, _mu_xy]]

0.742

13024

\begin{align*} \left (b +a \sin \left (y\right )^{2}\right ) y^{\prime \prime }+a {y^{\prime }}^{2} \cos \left (y\right ) \sin \left (y\right )+A y \left (c +a \sin \left (y\right )^{2}\right )&=0 \\ \end{align*}

[[_2nd_order, _missing_x]]

6.709

13025

\begin{align*} h \left (y\right ) y^{\prime \prime }+a h \left (y\right ) {y^{\prime }}^{2}+j \left (y\right )&=0 \\ \end{align*}

[[_2nd_order, _missing_x]]

3.028

13026

\begin{align*} y^{\prime } y^{\prime \prime }-x^{2} y y^{\prime }-x y^{2}&=0 \\ \end{align*}

[[_2nd_order, _exact, _nonlinear], [_2nd_order, _with_linear_symmetries], [_2nd_order, _reducible, _mu_x_y1], [_2nd_order, _reducible, _mu_y_y1], [_2nd_order, _reducible, _mu_poly_yn]]

244.703

13027

\begin{align*} \left (-y+y^{\prime } x \right ) y^{\prime \prime }+4 {y^{\prime }}^{2}&=0 \\ \end{align*}

[[_2nd_order, _with_linear_symmetries]]

8.965

13028

\begin{align*} \left (-y+y^{\prime } x \right ) y^{\prime \prime }-\left (1+{y^{\prime }}^{2}\right )^{2}&=0 \\ \end{align*}

[[_2nd_order, _with_linear_symmetries]]

25.309

13029

\begin{align*} a \,x^{3} y^{\prime } y^{\prime \prime }+b y^{2}&=0 \\ \end{align*}

[[_2nd_order, _with_linear_symmetries]]

52.390

13030

\begin{align*} \left ({y^{\prime }}^{2}+a \left (-y+y^{\prime } x \right )\right ) y^{\prime \prime }-b&=0 \\ \end{align*}

[[_2nd_order, _with_linear_symmetries]]

63.348

13031

\begin{align*} \left (a \sqrt {1+{y^{\prime }}^{2}}-y^{\prime } x \right ) y^{\prime \prime }-{y^{\prime }}^{2}-1&=0 \\ \end{align*}

[[_2nd_order, _missing_y]]

524.511

13032

\begin{align*} {y^{\prime \prime }}^{2}-a y-b&=0 \\ \end{align*}

[[_2nd_order, _missing_x], [_2nd_order, _reducible, _mu_x_y1]]

0.063

13033

\begin{align*} a^{2} {y^{\prime \prime }}^{2}-2 a x y^{\prime \prime }+y^{\prime }&=0 \\ \end{align*}

[[_2nd_order, _missing_y]]

1.086

13034

\begin{align*} 2 \left (x^{2}+1\right ) {y^{\prime \prime }}^{2}-x \left (x +4 y^{\prime }\right ) y^{\prime \prime }+2 \left (x +y^{\prime }\right ) y^{\prime }-2 y&=0 \\ \end{align*}

[NONE]

0.055

13035

\begin{align*} 4 {y^{\prime }}^{2}-2 \left (y+3 y^{\prime } x \right ) y^{\prime \prime }+3 x^{2} {y^{\prime \prime }}^{2}&=0 \\ \end{align*}

[[_2nd_order, _with_linear_symmetries]]

7.612

13036

\begin{align*} \left (2-9 x \right ) x^{2} {y^{\prime \prime }}^{2}-6 \left (1-6 x \right ) x y^{\prime } y^{\prime \prime }+6 y y^{\prime \prime }-36 x {y^{\prime }}^{2}&=0 \\ \end{align*}

[[_2nd_order, _with_linear_symmetries]]

41.745

13037

\begin{align*} y {y^{\prime \prime }}^{2}-a \,{\mathrm e}^{2 x}&=0 \\ \end{align*}

[[_2nd_order, _with_linear_symmetries]]

2.725

13038

\begin{align*} \left (y^{2} a^{2}-b^{2}\right ) {y^{\prime \prime }}^{2}-2 a^{2} y {y^{\prime }}^{2} y^{\prime \prime }+\left (a^{2} {y^{\prime }}^{2}-1\right ) {y^{\prime }}^{2}&=0 \\ \end{align*}

[[_2nd_order, _missing_x]]

1.954

13039

\begin{align*} \left (y^{2}-x^{2} {y^{\prime }}^{2}+x^{2} y y^{\prime \prime }\right )^{2}-4 x y \left (-y+y^{\prime } x \right )^{3}&=0 \\ \end{align*}

[[_2nd_order, _with_linear_symmetries]]

0.068

13040

\begin{align*} \sqrt {a {y^{\prime \prime }}^{2}+b {y^{\prime }}^{2}}+c y y^{\prime \prime }+d {y^{\prime }}^{2}&=0 \\ \end{align*}

[[_2nd_order, _missing_x]]

196.883

13041

\begin{align*} y^{\prime \prime \prime }-a^{2} \left ({y^{\prime }}^{5}+2 {y^{\prime }}^{3}+y^{\prime }\right )&=0 \\ \end{align*}

[[_3rd_order, _missing_x], [_3rd_order, _missing_y], [_3rd_order, _with_linear_symmetries], [_3rd_order, _reducible, _mu_y2]]

1.985

13042

\begin{align*} y^{\prime \prime \prime }+y y^{\prime \prime }-{y^{\prime }}^{2}+1&=0 \\ \end{align*}

[[_3rd_order, _missing_x], [_3rd_order, _with_linear_symmetries]]

0.033

13043

\begin{align*} y^{\prime \prime \prime }-y y^{\prime \prime }+{y^{\prime }}^{2}&=0 \\ \end{align*}

[[_3rd_order, _missing_x], [_3rd_order, _with_linear_symmetries]]

0.035

13044

\begin{align*} a y y^{\prime \prime }+y^{\prime \prime \prime }&=0 \\ \end{align*}

[[_3rd_order, _missing_x], [_3rd_order, _with_linear_symmetries]]

0.029

13045

\begin{align*} x^{2} y^{\prime \prime \prime }+y^{\prime \prime } x +\left (2 y x -1\right ) y^{\prime }+y^{2}-f \left (x \right )&=0 \\ \end{align*}

[[_3rd_order, _exact, _nonlinear]]

0.035

13046

\begin{align*} x^{2} y^{\prime \prime \prime }+x \left (-1+y\right ) y^{\prime \prime }+x {y^{\prime }}^{2}+\left (1-y\right ) y^{\prime }&=0 \\ \end{align*}

[[_3rd_order, _exact, _nonlinear], [_3rd_order, _with_linear_symmetries], [_3rd_order, _reducible, _mu_y2]]

0.040

13047

\begin{align*} y^{3} y^{\prime }-y^{\prime } y^{\prime \prime }+y y^{\prime \prime \prime }&=0 \\ \end{align*}

[[_3rd_order, _missing_x], [_3rd_order, _exact, _nonlinear], [_3rd_order, _with_linear_symmetries]]

0.036

13048

\begin{align*} 15 {y^{\prime }}^{3}-18 y y^{\prime } y^{\prime \prime }+4 y^{2} y^{\prime \prime \prime }&=0 \\ \end{align*}

[[_3rd_order, _missing_x], [_3rd_order, _with_linear_symmetries]]

0.038

13049

\begin{align*} 40 {y^{\prime }}^{3}-45 y y^{\prime } y^{\prime \prime }+9 y^{2} y^{\prime \prime \prime }&=0 \\ \end{align*}

[[_3rd_order, _missing_x], [_3rd_order, _with_linear_symmetries]]

0.049

13050

\begin{align*} 2 y^{\prime \prime \prime } y^{\prime }-3 {y^{\prime }}^{2}&=0 \\ \end{align*}

[[_3rd_order, _missing_x]]

0.138

13051

\begin{align*} \left (1+{y^{\prime }}^{2}\right ) y^{\prime \prime \prime }-3 y^{\prime } {y^{\prime \prime }}^{2}&=0 \\ \end{align*}

[[_3rd_order, _missing_x], [_3rd_order, _missing_y], [_3rd_order, _with_linear_symmetries], [_3rd_order, _reducible, _mu_y2], [_3rd_order, _reducible, _mu_poly_yn]]

0.707

13052

\begin{align*} \left (1+{y^{\prime }}^{2}\right ) y^{\prime \prime \prime }-\left (a +3 y^{\prime }\right ) {y^{\prime \prime }}^{2}&=0 \\ \end{align*}

[[_3rd_order, _missing_x], [_3rd_order, _missing_y], [_3rd_order, _with_linear_symmetries], [_3rd_order, _reducible, _mu_y2], [_3rd_order, _reducible, _mu_poly_yn]]

8.686

13053

\begin{align*} y^{\prime \prime } y^{\prime \prime \prime }-a \sqrt {1+b^{2} {y^{\prime \prime }}^{2}}&=0 \\ \end{align*}

[[_3rd_order, _missing_x], [_3rd_order, _missing_y], [_3rd_order, _with_linear_symmetries], [_3rd_order, _reducible, _mu_y2]]

13.599

13054

\begin{align*} y^{\prime } y^{\prime \prime \prime \prime }-y^{\prime \prime } y^{\prime \prime \prime }+{y^{\prime }}^{3} y^{\prime \prime \prime }&=0 \\ \end{align*}

[[_high_order, _missing_x], [_high_order, _missing_y], [_high_order, _with_linear_symmetries]]

0.076

13055

\begin{align*} 3 y^{\prime \prime } y^{\prime \prime \prime \prime }-5 {y^{\prime \prime \prime }}^{2}&=0 \\ \end{align*}

[[_high_order, _missing_x], [_high_order, _missing_y], [_high_order, _with_linear_symmetries], [_high_order, _reducible, _mu_poly_yn]]

1.188

13056

\begin{align*} 9 {y^{\prime \prime }}^{2} y^{\left (5\right )}-45 y^{\prime \prime } y^{\prime \prime \prime } y^{\prime \prime \prime \prime }+40 y^{\prime \prime \prime }&=0 \\ \end{align*}

[[_high_order, _missing_x], [_high_order, _missing_y], [_high_order, _with_linear_symmetries]]

0.099

13057

\begin{align*} y^{\prime \prime }-f \left (y\right )&=0 \\ \end{align*}

[[_2nd_order, _missing_x], [_2nd_order, _reducible, _mu_x_y1]]

1.748

13058

\begin{align*} y^{\prime \prime \prime }&=f \left (y\right ) \\ \end{align*}

[[_3rd_order, _missing_x], [_3rd_order, _with_linear_symmetries]]

0.023

13059

\begin{align*} x^{\prime }&=a x \\ y^{\prime }&=b \\ \end{align*}

system_of_ODEs

0.404

13060

\begin{align*} x^{\prime }&=a y \\ y^{\prime }&=-a x \\ \end{align*}

system_of_ODEs

0.373

13061

\begin{align*} x^{\prime }&=a y \\ y^{\prime }&=b x \\ \end{align*}

system_of_ODEs

0.447

13062

\begin{align*} x^{\prime }&=a x-y \\ y^{\prime }&=x+a y \\ \end{align*}

system_of_ODEs

0.366

13063

\begin{align*} x^{\prime }&=a x+b y \\ y^{\prime }&=c x+b y \\ \end{align*}

system_of_ODEs

0.884

13064

\begin{align*} a x^{\prime }+b y^{\prime }&=\alpha x+\beta y \\ b x^{\prime }-a y^{\prime }&=\beta x-\alpha y \\ \end{align*}

system_of_ODEs

0.737

13065

\begin{align*} x^{\prime }&=-y \\ y^{\prime }&=2 x+2 y \\ \end{align*}

system_of_ODEs

0.497

13066

\begin{align*} x^{\prime }+3 x+4 y&=0 \\ y^{\prime }+2 x+5 y&=0 \\ \end{align*}

system_of_ODEs

0.349

13067

\begin{align*} x^{\prime }&=-5 x-2 y \\ y^{\prime }&=x-7 y \\ \end{align*}

system_of_ODEs

0.479

13068

\begin{align*} x^{\prime }&=a_{1} x+b_{1} y+c_{1} \\ y^{\prime }&=a_{2} x+b_{2} y+c_{2} \\ \end{align*}

system_of_ODEs

2.789

13069

\begin{align*} x^{\prime }+2 y&=3 t \\ y^{\prime }-2 x&=4 \\ \end{align*}

system_of_ODEs

0.577

13070

\begin{align*} x^{\prime }+y-t^{2}+6 t +1&=0 \\ -x+y^{\prime }&=-3 t^{2}+3 t +1 \\ \end{align*}

system_of_ODEs

0.657

13071

\begin{align*} x^{\prime }+3 x-y&={\mathrm e}^{2 t} \\ y^{\prime }+x+5 y&={\mathrm e}^{t} \\ \end{align*}

system_of_ODEs

0.564

13072

\begin{align*} x^{\prime }+2 x+y^{\prime }+y&={\mathrm e}^{2 t}+t \\ x^{\prime }-x+y^{\prime }+3 y&={\mathrm e}^{t}-1 \\ \end{align*}

system_of_ODEs

0.192

13073

\begin{align*} x^{\prime }+y^{\prime }-y&={\mathrm e}^{t} \\ 2 x^{\prime }+y^{\prime }+2 y&=\cos \left (t \right ) \\ \end{align*}

system_of_ODEs

0.618

13074

\begin{align*} 4 x^{\prime }+9 y^{\prime }+2 x+31 y&={\mathrm e}^{t} \\ 3 x^{\prime }+7 y^{\prime }+x+24 y&=3 \\ \end{align*}

system_of_ODEs

1.021

13075

\begin{align*} 4 x^{\prime }+9 y^{\prime }+11 x+31 y&={\mathrm e}^{t} \\ 3 x^{\prime }+7 y^{\prime }+8 x+24 y&={\mathrm e}^{2 t} \\ \end{align*}

system_of_ODEs

0.574

13076

\begin{align*} 4 x^{\prime }+9 y^{\prime }+44 x+49 y&=t \\ 3 x^{\prime }+7 y^{\prime }+34 x+38 y&={\mathrm e}^{t} \\ \end{align*}

system_of_ODEs

0.657

13077

\begin{align*} x^{\prime }&=x f \left (t \right )+y g \left (t \right ) \\ y^{\prime }&=-x g \left (t \right )+y f \left (t \right ) \\ \end{align*}

system_of_ODEs

0.032

13078

\begin{align*} x^{\prime }+\left (a x+b y\right ) f \left (t \right )&=g \left (t \right ) \\ y^{\prime }+\left (c x+d y\right ) f \left (t \right )&=h \left (t \right ) \\ \end{align*}

system_of_ODEs

0.045

13079

\begin{align*} x^{\prime }&=x \cos \left (t \right ) \\ y^{\prime }&=x \,{\mathrm e}^{-\sin \left (t \right )} \\ \end{align*}

system_of_ODEs

0.035

13080

\begin{align*} t x^{\prime }+y&=0 \\ y^{\prime } t +x&=0 \\ \end{align*}

system_of_ODEs

0.026

13081

\begin{align*} t x^{\prime }+2 x&=t \\ y^{\prime } t -\left (t +2\right ) x-t y&=-t \\ \end{align*}

system_of_ODEs

0.033

13082

\begin{align*} t x^{\prime }+2 x-2 y&=t \\ y^{\prime } t +x+5 y&=t^{2} \\ \end{align*}

system_of_ODEs

0.032

13083

\begin{align*} t^{2} \left (1-\sin \left (t \right )\right ) x^{\prime }&=t \left (1-2 \sin \left (t \right )\right ) x+t^{2} y \\ t^{2} \left (1-\sin \left (t \right )\right ) y^{\prime }&=\left (t \cos \left (t \right )-\sin \left (t \right )\right ) x+t \left (1-t \cos \left (t \right )\right ) y \\ \end{align*}

system_of_ODEs

0.048

13084

\begin{align*} x^{\prime }+y^{\prime }+y&=f \left (t \right ) \\ x^{\prime \prime }+y^{\prime \prime }+y^{\prime }+x+y&=g \left (t \right ) \\ \end{align*}

system_of_ODEs

0.037

13085

\begin{align*} 2 x^{\prime }+y^{\prime }-3 x&=0 \\ x^{\prime \prime }+y^{\prime }-2 y&={\mathrm e}^{2 t} \\ \end{align*}

system_of_ODEs

0.033

13086

\begin{align*} x^{\prime }+x-y^{\prime }&=2 t \\ x^{\prime \prime }+y^{\prime }-9 x+3 y&=\sin \left (2 t \right ) \\ \end{align*}

system_of_ODEs

0.036

13087

\begin{align*} x^{\prime }-x+2 y&=0 \\ x^{\prime \prime }-2 y^{\prime }&=2 t -\cos \left (2 t \right ) \\ \end{align*}

system_of_ODEs

0.042

13088

\begin{align*} t x^{\prime }-y^{\prime } t -2 y&=0 \\ t x^{\prime \prime }+2 x^{\prime }+t x&=0 \\ \end{align*}

system_of_ODEs

0.034

13089

\begin{align*} x^{\prime \prime }+a y&=0 \\ y^{\prime \prime }-a^{2} y&=0 \\ \end{align*}

system_of_ODEs

0.025

13090

\begin{align*} x^{\prime \prime }&=a x+b y \\ y^{\prime \prime }&=c x+d y \\ \end{align*}

system_of_ODEs

0.037

13091

\begin{align*} x^{\prime \prime }&=a_{1} x+b_{1} y+c_{1} \\ y^{\prime \prime }&=a_{2} x+b_{2} y+c_{2} \\ \end{align*}

system_of_ODEs

0.025

13092

\begin{align*} x^{\prime \prime }+x+y&=-5 \\ y^{\prime \prime }-4 x-3 y&=-3 \\ \end{align*}

system_of_ODEs

0.036

13093

\begin{align*} x^{\prime \prime }&=\left (3 \cos \left (a t +b \right )^{2}-1\right ) c^{2} x+\frac {3 c^{2} y \sin \left (2 a t b \right )}{2} \\ y^{\prime \prime }&=\left (3 \sin \left (a t +b \right )^{2}-1\right ) c^{2} y+\frac {3 c^{2} x \sin \left (2 a t b \right )}{2} \\ \end{align*}

system_of_ODEs

0.036

13094

\begin{align*} x^{\prime \prime }+6 x+7 y&=0 \\ y^{\prime \prime }+3 x+2 y&=2 t \\ \end{align*}

system_of_ODEs

0.027

13095

\begin{align*} x^{\prime \prime }-a y^{\prime }+b x&=0 \\ y^{\prime \prime }+a x^{\prime }+b y&=0 \\ \end{align*}

system_of_ODEs

0.042

13096

\begin{align*} a_{1} x^{\prime \prime }+b_{1} x^{\prime }+c_{1} x-A y^{\prime }&=B \,{\mathrm e}^{i \omega t} \\ a_{2} y^{\prime \prime }+b_{2} y^{\prime }+c_{2} y+A x^{\prime }&=0 \\ \end{align*}

system_of_ODEs

0.057

13097

\begin{align*} x^{\prime \prime }+a \left (x^{\prime }-y^{\prime }\right )+b_{1} x&=c_{1} {\mathrm e}^{i \omega t} \\ y^{\prime \prime }+a \left (y^{\prime }-x^{\prime }\right )+b_{2} y&=c_{2} {\mathrm e}^{i \omega t} \\ \end{align*}

system_of_ODEs

0.048

13098

\begin{align*} \operatorname {a11} x^{\prime \prime }+\operatorname {b11} x^{\prime }+\operatorname {c11} x+\operatorname {a12} y^{\prime \prime }+\operatorname {b12} y^{\prime }+\operatorname {c12} y&=0 \\ \operatorname {a21} x^{\prime \prime }+\operatorname {b21} x^{\prime }+\operatorname {c21} x+\operatorname {a22} y^{\prime \prime }+\operatorname {b22} y^{\prime }+\operatorname {c22} y&=0 \\ \end{align*}

system_of_ODEs

0.063

13099

\begin{align*} x^{\prime \prime }-2 x^{\prime }-y^{\prime }+y&=0 \\ y^{\prime \prime \prime }-y^{\prime \prime }+2 x^{\prime }-x&=t \\ \end{align*}

system_of_ODEs

0.038

13100

\begin{align*} x^{\prime \prime }+y^{\prime \prime }+y^{\prime }&=\sinh \left (2 t \right ) \\ 2 x^{\prime \prime }+y^{\prime \prime }&=2 t \\ \end{align*}

system_of_ODEs

0.035