22 citations · 137 across the 27 of their papers we have counts for
5 papers · 1 filter
(Semi-)Models for Slice Regular Functions on Real Division Algebras
Amedeo Altavilla, Cinzia Bisi
We study slice regular functions on the real division algebras and from the point of view of equivalence under automorphism and conjugation actions. Motiv…
Complex Quaternions and Superminimal Surfaces in Four-Space
Amedeo Altavilla, Elena Giorgio
We develop a quaternionic approach to conformal superminimal surfaces in Euclidean four-space. The starting point is the classical Weierstrass representation: every conformal minim…
The Flat CR Twistor Model and Its Algebraic Sections
Amedeo Altavilla, Stefano Marini
We study the flat CR twistor model by explicit projective methods. Using the anti-holomorphic involution associated with the twistor fibration, w…
Geometry of the Donaldson-Friedman Pushout: Twistor degenerations and instanton charge
Amedeo Altavilla, Maurício Corrêa
We study the Donaldson-Friedman semistable twistor degeneration by combining the scheme-theoretic geometry of its Ferrand pushout with the logarithmic topology of its Kato-Nakayama…
Jordan-Segmentable Masks: A Topology-Aware definition for characterizing Binary Image Segmentation
Serena Grazia De Benedictis, Amedeo Altavilla, Nicoletta Del Buono
Image segmentation plays a central role in computer vision. However, widely used evaluation metrics, whether pixel-wise, region-based, or boundary-focused, often struggle to captur…