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refactor: update to ModelingToolkitv10 #786

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May 29, 2025
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refactor: update to ModelingToolkitv10 #786

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039a37b
CompatHelper: bump compat for ModelingToolkit to 10 for package docs,…
May 29, 2025
2a71ca6
docs: update docs to ModelingToolkitv10
AayushSabharwal May 29, 2025
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2 changes: 1 addition & 1 deletion docs/Project.toml
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Original file line number Diff line number Diff line change
Expand Up @@ -60,7 +60,7 @@ FiniteDiff = "2"
ForwardDiff = "0.10, 1"
IncompleteLU = "0.2"
JLD2 = "0.4, 0.5.1"
ModelingToolkit = "9"
ModelingToolkit = "10"
NonlinearSolve = "3.15, 4"
ODEProblemLibrary = "0.1"
Optimization = "3, 4"
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3 changes: 1 addition & 2 deletions docs/src/basics/faq.md
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Expand Up @@ -194,8 +194,7 @@ DAE solvers will not be able to accurately solve the equation without rewriting
ModelingToolkit is able to automatically detect this kind of condition and perform the equation
transformation automatically. As such, if you are having difficulties with a DAE system, it is
highly recommended to try `modelingtookitize` to transform the system to MTK's formulation and
running `structural_simplify` to see how it would change the equations, simply convert the model
to MTK.
running `mtkcompile` to see how it would change the equations, simply convert the model to MTK.

## [Performance](@id faq_performance)

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7 changes: 3 additions & 4 deletions docs/src/examples/outer_solar_system.md
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Expand Up @@ -16,6 +16,7 @@ The data is taken from the book “Geometric Numerical Integration” by E. Hair

```@example outersolarsystem
using Plots, OrdinaryDiffEq, ModelingToolkit
using ModelingToolkit: t_nounits as t, D_nounits as D
gr()

G = 2.95912208286e-4
Expand Down Expand Up @@ -47,9 +48,8 @@ Here, we want to solve for the motion of the five outer planets relative to the
```@example outersolarsystem
const ∑ = sum
const N = 6
@variables t u(t)[1:3, 1:N]
@variables u(t)[1:3, 1:N]
u = collect(u)
D = Differential(t)
potential = -G *
∑(
i -> ∑(j -> (M[i] * M[j]) / √(∑(k -> (u[k, i] - u[k, j])^2, 1:3)), 1:(i - 1)),
Expand All @@ -71,8 +71,7 @@ Thus, $\dot{q}$ is defined by the masses. We only need to define $\dot{p}$, and
```@example outersolarsystem
eqs = vec(@. D(D(u))) .~ .-ModelingToolkit.gradient(potential, vec(u)) ./
repeat(M, inner = 3)
@named sys = ODESystem(eqs, t)
ss = structural_simplify(sys)
@mtkcompile sys = System(eqs, t)
prob = ODEProblem(ss, [vec(u .=> pos); vec(D.(u) .=> vel)], tspan)
sol = solve(prob, Tsit5());
```
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