The research in this paper was motivated by one of the most important open problems in the theory of generalized polygons, namely the existence problem for semi-finite thick generalized polygons. We show here that no semi-finite generalized hexagon of order (2, t) can have a subhexagon H of order 2. Such a subhexagon is necessarily isomorphic to the split Cayley generalized hexagon H(2) or its ...

Abstract In this paper, we extend Open-set Semantic Segmentation (OSS) into a new image segmentation task called Generalized (GOSS). Previously, with well-known OSS, the intelligent agents only detect unknown regions without further processing, limiting their perception capacity of environment. It stands to reason that analysis detected pixels would be beneficial for agents’ decision-making. Th...