Benjamin Randrianirina

collaborators

3 papers

math.CO2026

The Molecular Species $C_{α}$ : Geometric Realization and a Closed Formula for Kronecker Coefficients

Josaphat Baolahy, Benjamin Randrianirina

In this paper we first introduce the \emph{infinite multi-row periodic pattern of shape $α$ } as a geometric realization of $C_{α}$ . We then give an explicit formula for the…

math.CO2026

Species, Symmetric Functions, and Kronecker Product

Josaphat Baolahy, Randrianirina Benjamin

We study two new families of symmetric functions arising from a species-theoretic construction motivated by cycle structure. For each partition of $n$ , we define two combinatorial…

math.CO2025

Triangular Arrays using context-free grammar

Voalaza Mahavily Romuald Aubert, Benjamin Randrianirina

In this work, the Hao grammar $G = {u \to u^{b_{1} + b_{2} + 1} v^{a_{1} + a_{2}}, v \to u^{b_{2}} v^{a_{2} + 1}},$ together with the correspondence between grammars and combin…

The Molecular Species Cα​: Geometric Realization and a Closed Formula for Kronecker Coefficients

Species, Symmetric Functions, and Kronecker Product

Triangular Arrays using context-free grammar

The Molecular Species $C_{α}$ : Geometric Realization and a Closed Formula for Kronecker Coefficients