Abstract
Some of Schubert's numbers not involving tangency conditions were verified by Cremona and Todd IT]. On the other hand, Alguneid [A] gave a derivation of Schubert's Ii first order degenerations of complete twisted cubics using complete collineations. A similar study was done in [P], with the difference that the degenerations were taken to be flat specializations (thus distinguishing between different multiple structures and including possible embedded points) thus working in Hilbert schemes rather than Chow schemes.
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