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Continue to ChatTheta functions of indefinite binary quadratic forms - https://avesis.gsu.edu.tr/yonetilen-tez/7d412244-ce59-41ac-8f36-dfa1a207fa7d/theta-functions-of-indefinite-binary-quadratic-forms
Theta functions of indefinite binary quadratic forms - https://avesis.gsu.edu.tr/yonetilen-tez/7d412244-ce59-41ac-8f36-dfa1a207fa7d/theta-functions-of-indefinite-binary-quadratic-forms