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The tubular neighborhood theorem in contact geometry

✍ Scribed by F. Loose

Publisher
Vandenhoeck & Ruprecht
Year
1998
Tongue
German
Weight
838 KB
Volume
68
Category
Article
ISSN
0025-5858

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Given a matroid and an integer n \_> 0, eleven conditions are shown to be equivalent to the validity of the rank formula r(E V F) + r(E A F) = r(E) + r(F) for subspaces satisfying r(E A F) > n. For n = 0 one finds the projective geometries. The case n = 1 also includes the affine and the hyperbolic