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A criterion for a point to be geometrically unibranched

โœ Scribed by Yves Lequain

Publisher
Elsevier Science
Year
1976
Tongue
English
Weight
555 KB
Volume
43
Category
Article
ISSN
0021-8693

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## dedicated to henry crapo on his 65th birthday Let G(r, 1, l ) be the complex arrangement where ! is a primitive rth root of unity. The matroids of these arrangements are the Dowling matroids Q l (Z r ), where Z r is the group of rth roots of unity. We show that if E is a subset of G(r, 1, l )