Theorem
Ifand
are sets of reciprocal vectors, and
(1) then
Proof
Sinceand
are perpendicular sets,
Substitute (1) into these expressions, obtaining
Then
Now use the identityhence
Theorem
Ifand
are sets of reciprocal vectors, and
(1) then
Proof
Sinceand
are perpendicular sets,
Substitute (1) into these expressions, obtaining
Then
Now use the identityhence