Implementation and workflows
This section explains how Quantas turns the scientific models described in Scientific background into reproducible numerical workflows. The emphasis is not on private classes or source-code organization, but on the scientific and numerical decisions exposed to users:
which representation is fitted or interpolated;
which approximation is selected by default and why;
which alternatives are available;
which diagnostics must be inspected;
which controls change accuracy, robustness, memory use, or execution time;
which warnings indicate extrapolation or a degraded calculation.
The pages complement, but do not duplicate, the worked examples in Tutorials or the exact option syntax in Quantas command line.