MathJax and LaTeX

MathJax is available in write.as blog posts only, not anonymous posts. great MathJax reference MathJax turns 3.0 online LaTeX editor; codingGround | 2nd LaTeX coding example |

Get LaTeX source from browser developer Elements tab: https://imgur.com/Th8Gj

When $a \ne 0$, there are two solutions to $ax^2 + bx + c = 0$ and they are $$(x = {-b \pm \sqrt{b^2-4ac} \over 2a})$$ You can test this online using jsbin.com $$\left [ – \frac{\hbar^2}{2 m} \frac{\partial^2}{\partial x^2} + V \right ] \Psi = i \hbar \frac{\partial}{\partial t} \Psi$$ $$f(a) = \frac{1}{2\pi i} \oint\frac{f(z)}{z-a}dz$$ $$\hbar \frac{\partial}{\partial t} \Psi = \hat H\Psi$$ $$\lim_{x \to +\infty} \frac{3x^2 +7x^3}{x^2 +5x^4} = 3$$

$$\sigma = \sqrt{\frac{3x^2 +7x^3}{x^2 +5x^4}}$$

These examples use inline LaTeX. Note that write.as/writefreely does not work with $, you need to use \$ and \$ instead of $\H_0$ $H_0$ $\ddot a$ : \ddot a to put a double dot over a $\vec a$ : to put a little arrow over a $\bar a$ : \bar a to put an overbar over a $\tilde a$ : \tilde a to put '~' over a $\hat a$ : \hat a to put '^' over a $\dot a$ : \dot a to put a single dot over a

$\Lambda^\mu_\nu$

$\Lambda_\nu^\mu$

$\Lambda^\mu{}_\nu$

According to Planck's law, the energy density inside a blackbody cavity for modes with frequency $\nu$ $\in$ $[\nu, \nu + \mathrm{d}\nu]$ is given by $$ \rho(\nu, T)\mathrm{d}\nu = \frac{8\pi\nu^2}{c^3}\frac{h\nu}{\exp\left(\frac{h\nu}{k T}\right) – 1}\mathrm{d}\nu $$ from: https://www.physicsforums.com/threads/radiance-and-energy-density-of-a-black-body.956343/

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