View PDF - Project Euclid
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View PDF - Project Euclid
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468 PHILLIP A. GRIFFITHS<br />
Kfihler form on (I N pulled back to N[r] becomes<br />
b= /-1 (<br />
The volume form on ([N is<br />
N<br />
We shall iterate the volume integral on N[r]; thus setting<br />
we find<br />
(z, r) j Itll<br />
O(z, t)<br />
vol rr(M) I qt(z, r).<br />
To evaluate the right hand side we fix z, assume as we may that our moving<br />
frame has been chosen so that o.(z) 0 (this is convenient but not essential),<br />
and set<br />
dt dtn + A A diN<br />
o o, A Aro.<br />
h(t).<br />
h(t)Ao-<br />
k!<br />
det(h(t),)<br />
where A (o1, o, Ok) and D (31, ", 3k) are index sets<br />
(1, ., n). Denoting by A the index set complementary to A,<br />
selected from<br />
A 49. +- h(t)AOOAO A<br />
A,D<br />
13<br />
B,C<br />
where it is understood that the summation is over index sets having the same<br />
number of elements. It follows that<br />
For/x (/zl, ",/xk) with/xl