1.字母上面加上标
a^\hat{a}a^\hat{a}
aˋ\grave{a}aˋ\grave{a}
aˉ\bar{a}aˉ\bar{a}
aˇ\check{a}aˇ\check{a}
a˙\dot{a}a˙\dot{a}
a⃗\vec{a}a\vec{a}
a~\tilde{a}a~\tilde
a¨\ddot{a}a¨\ddot{a}
A^\widehat{A}A\widehat{a}
aˊ\acute{a}aˊ\acute{a}
a˘\breve{a}a˘\breve{a}
A~\widetilde{A}A\widetilde{a}
2.小写希腊字母
α\alphaα\alpha
β\betaβ\beta
γ\gammaγ\gamma
δ\deltaδ\delta
ϵ\epsilonϵ\epsilon
ε\varepsilonε\varepsilon
ζ\zetaζ\zeta
η\etaη\eta
θ\thetaθ\theta
ϑ\varthetaϑ\vartheta
ι\iotaι\iota
κ\kappaκ\kappa
λ\lambdaλ\lambda
μ\muμ\mu
ν\nuν\nu
ξ\xiξ\xi
oooo
π\piπ\pi
ϖ\varpiϖ\varpi
ρ\rhoρ\rho
ϱ\varrhoϱ\varrho
σ\sigmaσ\sigma
ς\varsigmaς\varsigma
τ\tauτ\tau
υ\upsilonυ\upsilon
ϕ\phiϕ\phi
φ\varphiφ\varphi
χ\chiχ\chi
ψ\psiψ\psi
ω\omegaω\omega
