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Conditions for uniqueness of limit Gibbs states
(Bilkent University, 1998)
In this work we studied the problem of phase transitions in one-dirnensional
models with unique ground state. A model ha\dng two spins, one ground state
and exhibiting phase transition is constructed.
Singularities of plane model of the modular curve Yo(l)
(Bilkent University, 1998)