As M.-A. Tonnelat did, Mme. Mavridès changed around her notation in some papers: for what is named here
,
she first wrote
, i.e.,
, and, in her next paper,
; in the present paper, the full asymmetric
metric is
and its inverse
. In part of the tensors used, indices are moved with the
metric; yet most tensors with upper and lower indices are just the inverses of each other. Also, in [400, 401], the electrical field
became singular again at
.