Representing characteristic homology classes of

Authors:
Jian Han Guo and Dan Yan Gan

Journal:
Proc. Amer. Math. Soc. **121** (1994), 1251-1255

MSC:
Primary 57R95; Secondary 57R40

MathSciNet review:
1205494

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Abstract | References | Similar Articles | Additional Information

Abstract: We prove the following theorems.

**Theorem 1.** *If* *is a characteristic homology class with* *and* (1) *provided* , *or* (2) *provided* .

*Suppose that the 11/8-conjecture is true. Then x cannot be represented by a smoothly embedded 2-sphere*.

**Theorem 2.** *Let* *be a primitive characteristic homology class with* . *Then x can be represented by a smoothly embedded 2-sphere*.

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Additional Information

DOI:
https://doi.org/10.1090/S0002-9939-1994-1205494-7

Keywords:
Representing,
characteristic homology class,
primitive

Article copyright:
© Copyright 1994
American Mathematical Society