Title: The early universe as a probe of Planck scale physics

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Abstract:
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The early universe is arguably the most promising laboratory where to test properties of physics at the Planck scale. I will review the current observational evidence concerning the primordial universe from a model-independent perspective, emphasising the fundamental assumptions behind the inflationary framework that make it so successful in matching observations I will then provide examples of different sets of assumptions that might be viable as well in producing the observed properties of primordial perturbations and I will show that models with Planck-scale deformed dispersion relations provide a scenario that is compatible with these assumption.