Particle basis of Feigin-Stoyanovsky's type subspaces of level $1$ $\tilde{\mathfrak{sl}}_{\ell+1}(\mathbb{C})$-modules

Math Commun 20 (2015) 185-192 We construct particle basis for Feigin-Stoyanovsky's type subspaces of level $1$ standard $\tilde{\mathfrak{sl}}_{\ell+1}(\mathbb{C})$-modules. From the description we obtain character formulas.