Verde, Licia2017-09-012017-09-0120101687-7969https://hdl.handle.net/2445/114874With the advent of galaxy surveys which provide large samples of galaxies or galaxy clusters over a volume comparable to the horizon size (SDSS-III, HETDEX, Euclid, JDEM, LSST, Pan-STARRS, CIP, etc.) or mass-selected large cluster samples over a large fraction of the extra-galactic sky (Planck, SPT, ACT, CMBPol, B-Pol), it is timely to investigate what constraints these surveys can impose on primordial non-Gaussianity. I illustrate here three different approaches: higher-order correlations of the three dimensional galaxy distribution, abundance of rare objects (extrema of the density distribution), and the large-scale clustering of halos (peaks of the density distribution). Each of these avenues has its own advantages, but, more importantly, these approaches are highly complementary under many respects.16 p.application/pdfengcc-by (c) Verde, Licia, 2010http://creativecommons.org/licenses/by/3.0/esRelativitat general (Física)CosmologiaGeneral relativity (Physics)Cosmologyinfo:eu-repo/semantics/article6039182017-09-01info:eu-repo/semantics/openAccess