Schrödinger’s notation for
is
. (158) is formal because, implicitly, in
through its dependency on
the
connection
still is present. Compare (158) to Einstein’s equation (123) in Section 4.3.2 of Part I. We have not changed
Schrödinger’s kernel letter for the derived metric
in the hope that it will not be confused with the asymmetric metric in
mixed geometry.