Parametric decompositions into products of involutions

Gaofeng Huang, Frank Kutzschebauch, Tran Nam Son +1

It is a well-known result of Gustafson, Halmos and Radjavi, dating back to 1976, that any matrix $A$ in $S{L}_n(\mathbb{C})$ is a product of at most 4 involutions. We consider a natu…