arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1303.0199math.GT
收藏

捻度、测地线长度和瑟斯顿剪切的乘积

Products of twists, geodesic-lengths and Thurston shears

Scott A. Wolpert

摘要:

瑟斯顿介绍了剪切变形(灾变)的测地线层片-变形包括左和右位移沿测地线。对于具有尖点的双曲曲面,我们考虑理想测地线的不交并上的剪切变形。定义了理想测地线的平衡加权和的长度,并建立了剪切线与所定义长度的Weil-Petersson(WP)对偶。利用初等2-形式给出了不相交理想测地线集上的一对平衡权系的泊松括号。建立了理想测地线上平衡权系的辛几何。建立了Fock剪切坐标代数与WP Poisson代数的等价性。给出了WP-Riemannian对剪的计算公式。

英文摘要:

Thurston introduced shear deformations (cataclysms) on geodesic laminations - deformations including left and right displacements along geodesics. For hyperbolic surfaces with cusps, we consider shear deformations on disjoint unions of ideal geodesics. The length of a balanced weighted sum of ideal geodesics is defined and the Weil-Petersson (WP) duality of shears and the defined length is established. The Poisson bracket of a pair of balanced weight systems on a set of disjoint ideal geodesics is given in terms of an elementary 2-form. The symplectic geometry of balanced weight systems on ideal geodesics is developed. Equality of the Fock shear coordinate algebra and the WP Poisson algebra is established. The formula for the WP Riemannian pairing of shears is also presented.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑