5.1 – Aut | Initial chamber

VITAL REQUIREMENT

Knowledge of an initial $\pl$-chamber $\DD_0$
Having the $\iota(S)$-nondegeneracy property, i.e., inducing
a $\ps$-chamber $$D_0 = \DD_0 \cap \ps$$ such that $D_0 \subset \nps$.

---