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A property that characterizes Euler characteristic among invariants of combinatorial manifolds
Li Yu
If a real value invariant of compact combinatorial manifolds (with or without boundary) depends only on the number of simplices in each dimension on the manifold, then the invarian…
Localizable invariants of combinatorial manifolds and Euler characteristic
Li Yu
It is shown that if a real value PL-invariant of closed combinatorial manifolds admits a local formula that depends only on the f-vector of the link of each vertex, then the invari…
On 3-manifolds with locally-standard (Z_2)^3-actions
Zhi Lü, Li Yu
As a generalization of Davis-Januszkiewicz theory, there is an essential link between locally standard -actions (or -actions) actions and nice manifolds with corners…
Surgery on links with unknotted components and three-manifolds
Yu Guo, Li Yu
It is shown that any closed three-manifold M obtained by integral surgery on a knot in the three-sphere can always be constructed from integral surgeries on a 3-component link L wi…