C. Fonseca

collaborators

2 papers

math.CO2018

The $μ$ -permanent revisited

Carlos M. da Fonseca

Let $A = (a_{ij})$ be an $n$ -by- $n$ matrix. For any real number $μ$ , we define the polynomial $P_{μ} (A) = σ \in S_{n} \sum a_{1 σ (1)} \dots a_{nσ (n)} μ^{ℓ (σ)},$ as the $μ$ -permane…

math.RT2016

Topological classification of sesquilinear forms: reduction to the nonsingular case

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

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

The μ-permanent revisited

Topological classification of sesquilinear forms: reduction to the nonsingular case

The $μ$ -permanent revisited