Unclear symbol use in step acceptance criteria:

headmyshoulder / odeint-v2

odeint - solving ordinary differential equations in c++ v2

http://headmyshoulder.github.com/odeint-v2/

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Closed NAThompson closed 5 years ago

NAThompson commented 5 years ago

In the docs for the adaptive steppers, the following statement relates the absolute and relative tolerances to the acceptance criteria via

For the Runge-Kutta controller the error made during one step is compared with eps_abs + eps_rel ( ax |x| + adxdt dt |dxdt| ).

What are the definitions of the symbols a_x and a_dxdt?

What norm is used to define |x| and |dxdt|?

NAThompson commented 5 years ago

My bad, sry.