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math.CO2026
A Chain Ring Analogue of the Erdos-Ko-Rado Theorem
Ivan Landjev, Emiliyan Rogachev, Assia Rousseva
In this paper, we prove an analogue of the Erdős-Ko-Rado theorem intersecting families of subspaces in projective Hjelmslev geometries over finite chain rings of nilpotency index 2…
math.CO2026
Optimal codes and arcs for the generalized Hamming weights
Sascha Kurz, Ivan Landjev, Assia Rousseva
This text contains some notes on the Griesmer bound. In particular, we give a geometric proof of the Griesmer bound for the generalized weights and show that a Solomon--Stiffler ty…