We have analysed the cross correlations of daily fluctuations for N = 6358 US stock prices during the year 1999. From those N(N âˆ’ 1)/2 correlation coefficients, the minimum spanning tree (MST) hasâ€¦ (More)

We have analyzed the cross-correlations of daily fluctuations for N = 6 358 US stock prices during the year 1999. From those N (N âˆ’1)/2 correlations coefficients, the Minimum Spanning Tree (MST) hasâ€¦ (More)

We report acoustic measurements of popping bubbles during the collapsing of aqueous foams. The sound pattern is analyzed using classical methods of statistical physics. It is found that membraneâ€¦ (More)

In order to emphasize cross-correlations for fluctuations in major market places, series of up and down spins are built from financial data. Patterns frequencies are measured, and statistical testsâ€¦ (More)