Abstract
If
b is a
p-block of a normal subgroup
N of a
p-solvable group
G and
b
*
is its Brauer correspondent in
N
N
(
L
)
, where
L is a defect group of
b, then Harris–Knörr correspondents over
b and
b
*
contain equal numbers of irreducible Brauer characters over height zero Brauer characters.