SEM uses many Greek letters to represent the various variables and parameters. | Name | Uppercase | Lowercase | Roman transliteration | | ----------- | :---------------: | :------------------------------------------: | :-------------------: | | Alpha | $\Large A$ | $\Large \alpha$ | A | | Beta | $\Large B$ | $\Large \beta$ | B | | Gamma | $\Large \Gamma$ | $\Large \gamma$ | G | | Delta | $\Large \Delta$ | $\Large \delta$ | D | | Epsilon | $\Large E$ | $\Large \epsilon~$ (or $\Large \varepsilon$) | E (short) | | Zeta | $\Large Z$ | $\Large \zeta$ | Z | | Eta | $\Large H$ | $\Large \eta$ | E (long) | | Theta | $\Large \Theta$ | $\Large \theta$ | Th | | Iota | $\Large I$ | $\Large \iota$ | I | | Kappa | $\Large K$ | $\Large \kappa$ | K | | Lambda | $\Large \Lambda$ | $\Large \lambda$ | L | | Mu | $\Large M$ | $\Large \mu$ | M | | Nu | $\Large N$ | $\Large \nu$ | N | | Xi (or Ksi) | $\Large \Xi$ | $\Large \xi$ | X | | Omicron | $\Large O$ | $\Large \omicron$ | O (short) | | Pi | $\Large \Pi$ | $\Large \pi$ | P | | Rho | $\Large P$ | $\Large \rho$ | R | | Sigma | $\Large \Sigma$ | $\Large \sigma$ | S | | Tau | $\Large T$ | $\Large \tau$ | T | | Upsilon | $\Large \Upsilon$ | $\Large \upsilon$ | U | | Phi | $\Large \Phi$ | $\Large \phi~$ (or $\Large \varphi$) | Ph | | Chi | $\Large X$ | $\Large \chi$ | Ch | | Psi | $\Large \Psi$ | $\Large \psi$ | Ps | | Omega | $\Large \Omega$ | $\Large \omega$ | O (long) |