Valentin Hartmann 540f46f42c Improvement to Order Selection, Error approximation in the ABM stepper (#218)
* improves the order selection and modifies the error estimation accordingly

- assumes constant stepsize for the next step to approximate error
- moves the complete order adjustment to the class order_adjustment
- slight changes to adaptive_adams_coefficients

* changed the commit according to the requests and comments
2017-09-25 15:22:51 -07:00
..
2017-07-02 15:14:09 +02:00