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Ordinary double points and obstructed surfaces

โœ Scribed by Arnold Kas


Publisher
Elsevier Science
Year
1977
Tongue
English
Weight
689 KB
Volume
16
Category
Article
ISSN
0040-9383

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On the relation between lifting obstruct
โœ Christian Bohr ๐Ÿ“‚ Article ๐Ÿ“… 2000 ๐Ÿ› Elsevier Science ๐ŸŒ English โš– 95 KB

We consider partial liftings k : A โ†’ E of maps f : X โ†’ B, where (X, A) is a relative CW-complex and E โ†’ B is a fibration. In this situation, we have a primary obstruction to extend the partial lifting to a lifting of f on all of X, and there is an obstruction to extend k as an ordinary map into the