Maths letters

$$\alpha~\text{(alpha)}$$ $$\beta~\text{(beta)}$$ $$\gamma~\text{(gamma)}$$ $$\delta~\text{(delta)}$$ $$\Delta~\text{(Delta maj)}$$ $$\epsilon~\text{(epsilon)}$$ $$\theta~\text{(téta)}$$ $$\lambda~\text{(lambda)}$$ $$\zeta~\text{(zeta)}$$ $$\mu~\text{(mu)}$$ $$\xi~\text{(xi)}$$ $$\eta~\text{(eta)}$$ $$\nu~\text{(nu)}$$ $$\pi~\text{(pi)}$$ $$\Pi~\text{(Pi maj)}$$ $$\rho~\text{(rho)}$$ $$\sigma~\text{(sigma)}$$ $$\Sigma~\text{(Sigma maj)}$$ $$\tau~\text{(tau)}$$ $$\upsilon~\text{(upsilon)}$$ $$\phi~\text{(phi)}$$ $$\Phi~\text{(Phi maj)}$$ $$\chi~\text{(chi)}$$ $$\psi~\text{(psi)}$$ $$\Psi~\text{(Psi maj)}$$ $$\omega~\text{(omega)}$$ $$\Omega~\text{(Omega maj)}$$

https://katex.org/docs/supported.html