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ISSN:2394-3661 | Crossref DOI | SJIF: 5.138 | PIF: 3.854

International Journal of Engineering and Applied Sciences

(An ISO 9001:2008 Certified Online and Print Journal)

On the concept of Approximate Cofibration

( Volume 2 Issue 11,November 2015 ) OPEN ACCESS
Author(s):

Ali Nasser, Y. Gh. Gouda

Abstract:

In this article we study an important concept in the theory of fibration and cofibration, namely approximate cofibration (A-cofibration), which is the dual of the concept of approximate fibration  [5, 10, 13], we give some examples. Following the  known problems concerning the concept of cofibration as; the composition, the product, the pullback, the relation with retracts and so on, [1, 4, 6, 7 and 13], we give some similar results concerning A-cofibration.

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