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Fig. 3


Comparison of the known number of WD systems with that of the synthetic models. On the left, the comparisons for single WDs and resolved binaries are shown, on the right for unresolved binaries. The lines represent the observations and the markers the BPS models. The shaded area around the lines represents the statistical error on the observations from the square-root law. The statistical error is larger than the error given in Table 4 based on the distance estimate of individual systems.

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