1	1/4*2^(1/2)*qk	1/4*2^(1/2)	1/8*qk
-1/4*2^(1/2)*qk	1	5/16*qk	1/4*2^(1/2)
1/4*2^(1/2)	-5/16*qk	1	1/4*2^(1/2)*qk
-1/8*qk	1/4*2^(1/2)	-1/4*2^(1/2)*qk	1
