2.5.1 second order adjoint

Table 2.1197: second order adjoint [13]

#

ODE

CAS classification

Solved

Maple

Mma

Sympy

time(sec)

5839

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

[[_2nd_order, _with_linear_symmetries]]

11.514

5867

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

[[_2nd_order, _with_linear_symmetries]]

5.901

10228

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

[[_2nd_order, _with_linear_symmetries]]

0.773

12407

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

[[_2nd_order, _with_linear_symmetries]]

2.056

12695

\begin{align*} y^{\prime \prime }&=-\frac {\cos \left (x \right ) y^{\prime }}{\sin \left (x \right )}-\frac {\left (-17 \sin \left (x \right )^{2}-1\right ) y}{4 \sin \left (x \right )^{2}} \\ \end{align*}

[[_2nd_order, _with_linear_symmetries]]

1.295

13718

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

[[_2nd_order, _with_linear_symmetries]]

6.832

13757

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

[[_2nd_order, _with_linear_symmetries]]

3.326

13890

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

[[_2nd_order, _with_linear_symmetries]]

6.949

13924

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

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

4.351

18335

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

[[_2nd_order, _with_linear_symmetries]]

22.739

21459

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

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

1.773

26423

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

[[_2nd_order, _with_linear_symmetries]]

0.808

26667

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

[[_2nd_order, _with_linear_symmetries]]

4.209