16.2.7 Greek letters

The upper case versions of these Greek letters are only shown when they differ from Roman upper case letters.

SymbolCommandName
α\alphaAlpha
β\betaBeta
γ, Γ\gamma, \GammaGamma
δ, Δ\delta, \DeltaDelta
ε, ϵ\varepsilon, \epsilonEpsilon
ζ\zetaZeta
η\etaEta
θ, ϑ\theta, \varthetaTheta
ι\iotaIota
κ\kappaKappa
λ, Λ\lambda, \LambdaLambda
μ\muMu
ν\nuNu
ξ, Ξ\xi, \XiXi
π, Π\pi, \PiPi
ρ, ϱ\rho, \varrhoRho
σ, Σ\sigma, \SigmaSigma
τ\tauTau
ϕ, φ, Φ\phi, \varphi, \PhiPhi
χ\chichi
ψ, Ψ\psi, \PsiPsi
ω, Ω\omega, \OmegaOmega

For omicron, if you are using LaTeX’s default Computer Modern font then enter omicron just as ‘o’ or ‘O’. If you like having the name or if your font shows a difference then you can use something like \newcommand\omicron{o}. The package unicode-math has \upomicron for upright omicron and \mitomicron for math italic.

While the set membership relation symbol ∈ generated by \in is related to epsilon, it is never used for a variable.


Unofficial LaTeX2e reference manual