HYPERBOLIC STRINGS AND KAC-MOODY ALGEBRAS

Closed bosonic strings in the target space R(d-1,1) x T(q+2,1) with an extra time dimension in the internal space (hyperbolic strings) are considered. It is shown that in the Fock space of these strings Fock spaces of standard bosonic and bosonized fermionic strings with target spaces of dimensionality less-than-or-equal-to d + q are imbedded. The field limit of hyperbolic strings and its relation to infinite-component field theories are considered.