<p>Weak gravitational lensing by large-scale structure, or cosmic shear, is a powerful tool to investigate both the growth of structure and the expansion of the Universe, being also a key probe in the future Euclid space mission. In this talk I will introduce basic concepts of cosmic shear theory and observations, and present recent cosmic shear constraints on modified gravity.</p><p> </p><p> </p><p>Local: physics Department meeting room </p>
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