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We test the cosmological implications of a varying absolute magnitude of TypeIa supernovae using the Pantheon compilation, by reconstructing differentphenomenological approaches that could justify a varying absolute magnitude,but also approaches based on cosmic voids, modified gravity models and abinning scheme. In all the cases considered in this work, we find goodagreement with the expected values of the standard $\Lambda$CDM model and noevidence of new physics.

Is there any measurable redshift dependence on the SN Ia absolute magnitude?