## Illinois Journal of Mathematics

### Pseudo-isotopy classes of diffeomorphisms of the unknotted pairs $(S\sp {n+2},S\sp n)$ and $(S\sp {2p+2},S\sp p\times S\sp p)$

Nikolai A. Krylov

#### Abstract

We consider two pairs, the standard unknotted $n$-sphere in $S^{n+2}$, and the product of two $p$-spheres trivially embedded in $S^{2p+2}$, and study orientation preserving diffeomorphisms of these pairs. Pseudo-isotopy classes of such diffeomorphisms form subgroups of the mapping class groups of $S^n$ and $S^p\times S^p$, respectively, and we determine the algebraic structure of such subgroups when $n>4$ and $p>1$.

#### Article information

Source
Illinois J. Math., Volume 51, Number 3 (2007), 937-950.

Dates
First available in Project Euclid: 13 November 2009

https://projecteuclid.org/euclid.ijm/1258131112

Digital Object Identifier
doi:10.1215/ijm/1258131112

Mathematical Reviews number (MathSciNet)
MR2379732

Zentralblatt MATH identifier
1153.57020

#### Citation

Krylov, Nikolai A. Pseudo-isotopy classes of diffeomorphisms of the unknotted pairs $(S\sp {n+2},S\sp n)$ and $(S\sp {2p+2},S\sp p\times S\sp p)$. Illinois J. Math. 51 (2007), no. 3, 937--950. doi:10.1215/ijm/1258131112. https://projecteuclid.org/euclid.ijm/1258131112