Free Access

Fig. 1

thumbnail

Constraints in the r3-r4-plane (i.e. with fixed r1 and r2) for a field with N = 16 grid points and randomly drawn power spectra. For the lower bound, the results from the Cauchy-Schwarz inequality (green) as well as from the covariance matrix approach (blue) are shown.

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.