It also expounds such ar projective methods and properties for points various spherical curves and sphere systematically.

然后，系统地阐明了点、各种球面曲线以及球面的园弧投影方法和性质。

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In this paper we deal with some properties of cobordism classes of fiber bundles over the real projective space.

本文研究了底空间为实射影空间时上协边类纤维丛表示的若干性质。

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We describe the properties of the almost split sequence containing projective module as the first term and the middle term.

本文刻划了包含投射模的几乎可裂序列，给出以投射模为首项和中间项的几乎可裂序列的特性。

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