4 papers
math.GT2001
Symplectic genus, minimal genus and diffeomorphisms
Bang-He Li, Tian-Jun Li
In this paper, the symplectic genus for any 2-dimensional class in a 4-manifold admitting a symplectic structure is introduced, and its relation with the minimal genus is studied.…
math.QA2000
SO(3) invariants of Seifert manifolds and their algebraic integrality
Bang-He Li
For Seifert manifold $M=X({p_1}/_{\f{q_1}},{p_2}/_{\f{q_2}}, ...,{p_n}/_ {\f{q_n}}), τ^{'}_r(M)$ is calculated for all odd . If is coprime to at least of $p_k…
math.QA2000
An example concerning Ohtsuki's invariant and the full SO(3) quautum invariant
Bang-He Li, Tian-Jun Li
Two lens spaces are given to show that Ohtsuki's for rational homology spheres does not determine Kirby-Melvin's
math.QA1998
Kirby-Melvin's and Ohtsuki's for Lens spaces
Bang-He Li, Tian-Jun Li
In this note, we first derive explicit formulas for Kirby-Melvin's three-manifold invariants for all Lens spaces from our results for another set of invariants defi…