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math.RA2014
Simple twisted group algebras of dimension and their semi-centers
Ofir Schnabel
For simple twisted group algebra over a group , if is Hall subgroup of then the semi-center is simple. Simple twisted groups algebras correspond to groups of…
math.CO2014
On the reducibility of exact covering systems
Ofir Schnabel
There exist irreducible exact covering systems (ECS). These are ECS which are not a proper split of a coarser ECS. However, an ECS admiting a maximal modulus which is divisible by…