EDP Sciences
Free Access

Fig. 1


Left: indicative fieldlines for the ϵ = 1, azimuthally-symmetric proper null point. Right: the same fieldlines for the ϵ = 0.5 improper null point (note the loss of rotational symmetry). Blue fieldlines originate from z > 0, red from z < 0 and the black fieldlines originate at the null and lie in the fan plane, shaded grey.

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.