Welcome to VisualPDE!
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Oops! It looks like things have spiralled off to infinity, or the numerical solver is unstable.
Check the equations, or try reducing the timestep, and restart the simulation.
VisualPDE is throwing an error.
Check for syntax errors, and reload the page if the interface is unresponsive.
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If you're planning to share it on social media or messaging apps, check out our FAQ on video compatibility.