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几乎次亚紧和几乎强次亚紧空间
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作者 纪广月 《吉林化工学院学报》 CAS 2007年第1期88-90,共3页
证明了几乎次亚lindelf、可数紧度的可数紧X是紧空间.定义了几乎强次亚紧空间,给出了它的一个刻画,并证明了几乎强次亚紧、可数紧T3-空间是紧空间.
关键词 几乎次亚 可效紧 几乎强次亚
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Shape of Compact Toroidal Dimensions T_θ~d and Casimir Effect on M^D×T_θ~d Spacetime
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作者 V.K.Oikonomou 《Communications in Theoretical Physics》 SCIE CAS CSCD 2011年第1期101-110,共10页
We study the influence of the shape of compact a scalar field. We examine both the massive and the massless dimensions to the Casimir energy and Casimir force of scalar field. The total spacetime topology is M^D ×... We study the influence of the shape of compact a scalar field. We examine both the massive and the massless dimensions to the Casimir energy and Casimir force of scalar field. The total spacetime topology is M^D × Tθ2, where M^D) is the D-dimensional Minkowski spacetime and Tθ2 the twisted torus described by R1, R2, and 8. For the case R1 = R2 we found that the massive bulk scalar field Casimir energy is singular for D=even and this singularity is R-dependent and remains even when the force is calculated. Also the massless Casimir energy and force is regular only for D = 4 (!). This is very interesting phenomenologically. We examine the energy and force as a function of 8. Also we address the stabilization problem of the compact space. We also briefly discuss some phenomenological implications. 展开更多
关键词 Casimir energy Casimir force extra dimensions twisted torus shadowing effect zeta dimensions
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