Multi-groups

In the present paper we define homogeneous algebraic systems. Particular cases of these systems are: semigroup (monoid, group) system. These algebraic systems were studied by J. Loday, A. Zhuchok, T. Pirashvili, N. Koreshkov. Quandle systems were introduced and studied by V. Bardakov, D. Fedoseev, V. Turaev. We construct some group systems on the set of square matrices over a field $\mathbb{k}$. Also we define rack system on the set $V\times G$, where $V$ is a vector space of dimension $n$ over $\mathbb{k}$, $G$ is a subgroup of $G{L}_n(\mathbb{k})$.Finally, we find connection between skew braces and dimonoids.