A CLASSICAL MANIFESTATION OF THE PAULI EXCLUSION-PRINCIPLE

The occupied and unoccupied fermionic BPS quantum states of a type-IIA string stretched between a D6-brane and an orthogonal D2-brane are de scribed in M-theory by two particular holomorphic curves embedded in a Kaluza-Klein monopole. The absence of multiply-occupied fermionic sta tes - the Pauli exclusion principle - is manifested in M-theory by the absence of any other holomorphic curves satisfying the necessary boun dary conditions. Stable, non-BPS states with multiple strings joining the D6-brane and D2-brane are described M-theoretically by non-holomor phic curves.