A disposizione per prove varie e libere.

$K_{tan}=H(U)=\displaystyle \left( \begin{array}{ll} \frac{\partial^2U}{\partial u^2} & \frac{\partial^2U}{\partial u \partial v} \\ \frac{\partial^2U}{\partial v \partial u} &\frac{\partial^2U}{\partial v^2} \end{array}\right)$

${e}^{i\pi } + y=0$

${x}_{1,2}=\frac{-b\pm \sqrt{{b}^{2}-4ac}}{2a}$

You can also include formulas within a sentence, such as ${x}^{2} {y}^{2}=1$

It's pretty easy to include mathematical equations:

${e}^{i\pi }=0 \label{testme}$

${x}_{1,2}=\frac{-b\pm \sqrt{{b}^{2}-4ac}}{2a}$

$\frac{H_{U_1}}{H_{U_1}}$

$\frac{1}{2 \pi}$

${x}_{1,2}=\frac{-b\pm \sqrt{{b}^{2}-4ac}}{2a}$

Definisco forma matrice e vettore

$$\newcommand{\mat}[1]{\left[ \! \left[ \mathrm{#1}\right] \! \right]} \newcommand{\vec}[1]{\left[\mathrm{#1}\right]} \newcommand{\col}[2]{\mat{#1}_{.#2}} \newcommand{\row}[2]{\mat{#1}_{#2.}} \newcommand{\mele}[3]{\mat{#1}_{#2.#3}} \newcommand{\vele}[2]{\vec{#1}_{#2}} \mat{K}\vec{\delta}=\vec{F}$$

Elementi di matrice e di vettore

riga $$\row{K}{i}$$

colonna $$\col{K}{j}$$

elemento $$\mele{K}{i}{j}\equiv \mathrm{K}_{[i.j]} \equiv k_{ij}, \quad \vele{\delta}{i} \equiv \delta_{[i]} \equiv \delta_i$$

$$\boxed{\mathrm{K}} \underline{\delta} = \underline{F}$$

<latex>

 \dpi{400} f(x)=\int_{-\infty}^x e^{-t}dt

</latex>

<latex>

 \dpi{200} f(x)=\int_{-\infty}^x e^{-t^2}dt

</latex>

prova <latex> h(x)=\int_{-\infty}^x e^{-t^2}dt </latex> prova

Password suprema per conquistare il mondo ••••••••••, protetta con password ancor più suprema simsalabim.

prova prova ciao.

16860584189264117126854684928036.jpg

fine.