daviddoji/CalculusWithJuliaNotes.jl
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jverzani
2025-04-23 11:40:01 -04:00
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quarto/misc/quick_notes.qmd
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@@ -981,7 +981,7 @@ vcat([diff.(ex, [u,v])' for ex in F(u,v)]...)
### Divergence
Numerically, the divergence can be computed from the Jacobian by adding the diagonal elements. This is a numerically inefficient, as the other partial derivates must be found and discarded, but this is generally not an issue for these notes. The following uses `tr` (the trace from the `LinearAlgebra` package) to find the sum of a diagonal.
Numerically, the divergence can be computed from the Jacobian by adding the diagonal elements. This is a numerically inefficient, as the other partial derivatives must be found and discarded, but this is generally not an issue for these notes. The following uses `tr` (the trace from the `LinearAlgebra` package) to find the sum of a diagonal.
```{julia}