importproveitfromproveit.physics.quantum.QPEimport_phase_in_intervaltheory=proveit.Theory()# the theorem's theory
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%proving _phase_is_real
With these allowed/disallowed theorem/theory presumptions (e.g., to avoid circular dependencies), we begin our proof of _phase_is_real: (see dependencies)
_phase_is_real has been proven. Now simply execute "%qed".