3 papers
math.CO2026
Four-Entropic Matroids Are Quaternary
Mohammad Hossein Kalantari, Shahram Khazaei
For an integer , a matroid is -entropic if its rank function, multiplied by , is the joint-entropy function of random variables on a -element alphabet. We prov…
math.CO2026
Folded-Algebraic Matroids: Characteristic Rigidity and Almost-Entropic Separation
Shahram Khazaei
We introduce folded-algebraic matroids. In such a representation, every matroid element is replaced by a finite tuple of algebraic quantities, and transcendence degree agrees with…
cs.IT2026
Separating Abelian and Homomorphic Entropy Cones
Shahram Khazaei
Chan and Yeung showed that finite groups suffice to determine which homogeneous linear information inequalities are universally valid. We compare two restricted group-characterizab…