p-g diagram showing the frequencies of avoided crossings (diamonds) plotted against the large separation for a number of stars. The vertical lines show the range over which the l = 1 ridge is clearly seen. The inclined line is the observed relation between Δν and ν_max of Stello et al. (2009a). For KIC 10273246 there are two clear avoided crossings, whereas for KIC 10920273 there is only one clear crossing plus another likely one (open symbol).