Lemma 11. Let K be an algebraically closed field, and let k≥1 and T≥0 be integers. In the degree- k plane linear system over K , the locus of reduced curves satisfying δ(C)≥T is constructible. If nonempty, it has dimension at most …

Lemma 11. Let K be an algebraically closed field, and let k≥1 and T≥0 be integers. In the degree- k plane linear system over K , the locus of reduced curves satisfying δ(C)≥T is constructible. If nonempty, it has dimension at most k(k+3)2-T.