%0 Journal Article %T Retraction of null helix in Minkowski 3-space %A A. E. El- Ahmady %J specialty journal of architecture and construction %@ 2412-740X %D 2015 %V 1 %N 1 %P 8-13 %X ABSTRACT: Our aim in the present article is to introduce and study new types of retraction of null helix in Minkowski 3-space.Types of the deformation retracts of the null helix in Minkowski 3-space is presented. The relations between the retraction and the deformation retract of null helix are deduced. Types of minimal retraction of null helix in Minkowski 3-space are also presented. New types of homotopy maps are described. %U https://sciarena.com/article/retraction-of-null-helix-in-minkowski-3-space