This paper proposes a rigorous algebraic study of the Born-Von Karman BCs in Solid-State Physics. Starting from the definition of a Bravais Lattice L we construct step-by-step the isomorphism between the Finite Discrete Torus T^d₍䃑 ₍₃=L/ (NL) and the product of Cyclic Groups Z/N₁Z/NdZ with The First Isomorphism Theorem as the central tool of the proof. -0. 05cm Finally we introduce the Born-Von Karman Fundamental Cell BvK₍䃑 ₍₃ as a Transversal Of T^{d₍䃑 ₍₃}.
Amr Abdelwahab (Mon,) studied this question.