2 papers
math.AC2024
Invertibility in partially ordered nonassociative rings
Nizar El Idrissi, Hicham Zoubeir
Invertibility is important in ring theory because it enables division and facilitates solving equations. Moreover, (nonassociative) rings can be endowed with an extra ''structure''…
math.FA2023
The topology of finite and infinite-dimensional Stiefel manifolds and the relation to Grassmannians
Nizar El Idrissi
Stiefel manifolds arise naturally as spaces of injective operators and as total spaces of principal bundles over Grassmannians. While their finite-dimensional topology is governed…