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by robotresearcher 2949 days ago
The juice is at the very end of the README, where you can see the unicode markup (ignore HN-mangled newlines):

ˎˎ ˱∇ × [ ⃗B] - 1∕c ∂[ ⃗E]∕∂t ˳= 4π∕c [ ⃗j] ¦# ∇ ⋅ [ ⃗E]\ ˳= 4πρ ¦ ∇ × [ ⃗E] + 1∕c ∂[ ⃗B]∕∂t ˳= [ ⃗0] ¦ ∇ ⋅ [ ⃗B]\ ˳= 0 ˲ ,ˎˎ{#eq:max}

where ˎ[ ⃗B], [ ⃗E], [ ⃗j]: ℝ⁴ → ℝ³ˎ – vector functions of the form

ˎ(t,x,y,z) ↦ [ ⃗f](t,x,y,z), [ ⃗f] = (f_˹x˺, f_˹y˺, f_˹z˺)ˎ.

renders to:

$$ \begin{aligned}∇ × {\mathbf{B}} - \frac{1}{c} \frac{∂{\mathbf{E}}}{∂t} &= \frac{4π}{c} {\mathbf{j}}\ ∇ ⋅ {\mathbf{E}}\ &= 4πρ \ ∇ × {\mathbf{E}} + \frac{1}{c} \frac{∂{\mathbf{B}}}{∂t} &= {\mathbf{0}} \ ∇ ⋅ {\mathbf{B}}\ &= 0 \end{aligned} ,$${#eq:max}

where ${\mathbf{B}},,{\mathbf{E}},,{\mathbf{j}}:,ℝ^{4} → ℝ^{3}$ -- vector functions of the form $(t,x,y,z) ↦ {\mathbf{f}}(t,x,y,z),,{\mathbf{f}} = (f_{\mathrm{x}}, f_{\mathrm{y}}, f_{\mathrm{z}})$.