doc/2.physics.md: fix eq reference

2022-05-12 00:25:52 +02:00 · 2022-05-12 00:25:52 +02:00 · ebbea7cbeb
commit ebbea7cbeb
parent f5ab40f54f
1 changed files with 1 additions and 1 deletions
--- a/doc/2.physics.md
+++ b/doc/2.physics.md
@ -231,7 +231,7 @@ $$
    ≈ 4 \frac{ω}{c} {{\text {Im}}(N_{\perp w})}
        \frac {N_{\perp}} {|{∂ Λ}/{∂ {\bf N}|}}  \biggr|_{Λ=0}
    = 2{{\text{Im}}(k_{\perp w})} \frac{v_{g\perp}} v_{g}.
-$$ {eq:alpha}
+$$ {#eq:alpha}
 being $N_{\perp w}$ (and $k_{\perp w}$) the perpendicular refractive index (and
 wave vector) solution of the relativistic dispersion relation for EC waves
 $$