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- Fengchun Lei
- 2000

- Fengchun Lei, Guoqiu Yang
- 2009

- Ruifeng Qiu, Fengchun Lei
- 2008

Let M be a compact orientable 3-manifold which contains a non-separating closed incompressible surface F . Let M ′ = M −η(F ) where η(F ) is an open regular neighborhood of F in M . In the paper we… (More)

- Guoqiu Yang, Fengchun Lei
- 2008

Let M be a compact, orientable 3-manifold and F an essential closed surface which cuts M into M 1 and M 2 . Suppose that M i has a Heegaard splitting Vi U Si W i with distance D(S i ) ≥ 2 g (M i ) +… (More)

- Hui Wang, Fengchun Lei, Lidong Wang
- 2014

Abstract It is known that in a compact dynamical system, the whole space can be a Li–Yorke scrambled set, but this does not hold for distributional chaos. In this paper we prove that the complement… (More)

- Heng Liu, Fengchun Lei, Lidong Wang
- J. Applied Mathematics
- 2013

Consider the surjective, continuous map and the continuous map of induced by , where is a compact metric space and is the space of all nonempty compact subsets of endowed with the Hausdorff metric.… (More)

The intersecting kernel of a Heegaard splitting H1⋃SH2 for a compact orientable 3-manifold M is the subgroup K = Ker(i1∗) ∩Ker(i2∗) of π1(S), where ij∗ : π1(S) → π1(Hj) is the homomorphism induced by… (More)

Abstract A Heegaard splitting V 1 ∪ S V 2 is called weakly keen with distance 2 if there are essential separating disks D i ⊂ V i such that a component of V i − D i is homeomorphic to F i × I and… (More)

- Zhiguo Li, Fengchun Lei, Jingyan Li
- 2017

The authors study the properties of virtual Temperley-Lieb algebra and show how the f-polynomial of virtual knot can be derived from a representation of the virtual braid group into the virtual… (More)

Abstract Let M i be a compact orientable 3-manifold, and A i a non-separating incompressible annulus on ∂ M i , i = 1 , 2 . Let h : A 1 → A 2 be a homeomorphism, and M = M 1 ∪ h M 2 the annulus sum… (More)