Default norm used in ODE error control

[ranocha]

@stevengj

Some Julia libraries (e.g. QuadGK.jl) allow the caller to drop-in a norm replacement, but I’m not sure whether this is possible for DifferentialEquations.jl without overloading a bunch of methods?

You can pass keyword argument internalnorm, see https://diffeq.sciml.ai/stable/basics/common_solver_opts/#advanced_adaptive_stepsize_control