Topological classification of sesquilinear forms: reduction to the nonsingular case

Carlos M. da Fonseca, Tetiana Rybalkina, Vladimir V. Sergeichuk

Two sesquilinear forms $\Phi :{\mathbb{C}}^m\times {\mathbb{C}}^m\to \mathbb{C}$ and $\Psi :{\mathbb{C}}^n\times {\mathbb{C}}^n\to \mathbb{C}$ are called topologically equivalent if there exists a homeomo…