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abstract: 'In this contribution we review the large body of work carried out over the past two decades to probe the dark matter in the local universe using redshift survey and peculiar velocity data. While redshift surveys have evolved rapidly over the years, gathering suitable peculiar velocity data and understanding the short-comings of different analyses have proven to be a difficult task. These difficulties have led to conflicting results which have casted some doubts on the usefulness of cosmic flows to constrain cosmological models. Recently, however, a consistent picture seems to be finally emerging with various methods of analyses applied to different data sets yielding concordant results. These favor a low-density universe, with constraints which are in good agreement with those obtained from LSS, high-redshift supernovae and CMB studies.'
author:
- 'L. da Costa'
title: Matter in the Local Universe
---

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Introduction
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LSS studies of the nearby universe are arguably ideal to address the question posed by the title of this conference. Indeed, if all the mass in the universe were locked into galaxies, complete redshift surveys of galaxies would provide the data required to fully characterize the matter distribution. However, we have learned that the luminous 