2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/101948Introductory lectures on Extra Dimensions delivered at TASI 2004. The emphasis is on basic mechanisms rather than specific models.49 pages, 20 figures. Eqs. (14.3) - (14.8) on warped fermions corrected, plus other minor corrections made. References addedHigh Energy Physics - TheoryGeneral Relativity and Quantum CosmologyHigh Energy Physics - Phenomenologytext