A Geometrical Characterization of Spatially Curved Roberstion-Walker Space and Its Retractions

来源 :应用数学(英文) | 被引量 : 0次 | 上传用户：yuxk781224

【摘要】

：

Our aim in the present article is to introduce and study new types of retractions of closed flat Robertson-Walker W4 model. Types of the deformation retract of

【作者】

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Abd El-Aziz El-Ahmady El-Bagou

【机构】

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MathematicsDepartment,MathematicsDepartment

【出处】

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应用数学(英文)

【发表日期】

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2012年10期

【关键词】

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RETRACTION DEFORMATION Retracts Foldings FLAT Robertson-Walker Model Retraction

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Our aim in the present article is to introduce and study new types of retractions of closed flat Robertson-Walker W4 model. Types of the deformation retract of closed flat Robertson-Walker W4 model are obtained. The relations between the retraction and th

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A Geometrical Characterization of Spatially Curved Roberstion-Walker Space and Its Retractions

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