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arXiv 2104.14930math.GT
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非左序L-空间的无限族

Infinite families of non-left-orderable L-spaces

Hamid Abchir, Mohammed Sabak

摘要:

对于每个连通交错缠结,我们提供了一个无限族的非左序L-空间。这进一步支持了Boyer、Gordon和Watson的猜想[3],即有理同调3-球面是L-空间当且仅当它是非左序的。这些3-流形作为任意交替环绕缠结的双分支覆盖的Dehn填充而得到。我们把这些非左序L-空间表示为S^3的双分支覆盖,在某些特定的链上分支,这些链被证明是双曲的。我们证明了所得到的族包含许多非塞弗特纤维空间。我们还表明,这些家庭包括许多塞弗特纤维的空间,并给其中一些手术描述。在这个过程中,我们给出了另一种方法来证明环面结T(2,2 m +1)是L-空间结,正如Ozsváth和Szabó在[24]中已经证明的那样。

英文摘要:

For each connected alternating tangle, we provide an infinite family of non-left-orderable L-spaces. This gives further support for Conjecture [3] of Boyer, Gordon, and Watson that is a rational homology 3-sphere is an L-space if and only if it is non-left-orderable. These 3-manifolds are obtained as Dehn fillings of the double branched covering of any alternating encircled tangle. We give a presentation of these non-left-orderable L-spaces as double branched coverings of S^3, branched over some specified links that turn out to be hyperbolic. We show that the obtained families include many non-Seifert fibered spaces. We also show that these families include many Seifert fibered spaces and give a surgery description for some of them. In the process we give another way to prove that the torus knots T(2, 2m+1) are L-space-knots as has already been shown by Ozsváth and Szabó in [24].

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