ϼ
Rerank r←xϼy
x
must be a natural. r
is the result of changing the rank of y
to be x
:
- if the rank of
y
isx
,r
isy
- if the rank of
y
is greater thanx
, the leading axes ofy
are combined until the rank isx
- if the rank of
y
is less thanx
, leading axes of length1
are introduced until the rank isx
.