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@luana@wetdry.world
2025-11-15 02:22:46

Amanhã é o último dia para preencher o que ainda estš aberto!

@gscherer2@social.linux.pizza
2025-11-13 16:13:37

Three Double-crested Cormorants taking a break from fishing. Moonstone Beach, Cambria, California, USA. OM System OM-1 M.Zuiko 300mm F4 MC14. #moonstonebeach #cambria #cormorant

Three double-crested cormorants are standing on white-streaked tan rocks, with more rocks in the background. The cormorant on the left is preening its feathers, while the one in the middle is spreading its wings to let them dry. The one on the right is looking off into the distance.
@fortune@social.linux.pizza
2025-11-13 03:00:01

Este espaço deveria ser preenchido por uma frase inteligente
e espirituosa.

@arXiv_mathGR_bot@mastoxiv.page
2025-09-22 08:43:01

On the structure and skeletals of principal ideal graphs of inverse semigroups
C S Preenu, R S Indu, Sijo George
arxiv.org/abs/2509.15656 a…

On the structure and skeletals of principal ideal graphs of inverse semigroups
The principal left ideal graph of a semigroup is a simple graph whose vertices are the non-zero elements of the semigroup, and two vertices are adjacent if their principal left ideals intersect non-trivially. In this paper, we study the structure of the principal ideal graphs of inverse semigroups, particularly symmetric inverse semigroups. We also introduce the concept of skeletal of a graph and show that the principal ideal graph of an inverse semigroup has a skeletal, which is a simple graph…