Table 4.

Pocock and O'Brien Fleming type boundaries for the intersection of three and two hypotheses and the elementary hypothesis if no binding futility stopping rule is applied l ₁=−∞,r = 1 and n ₁/n = 1/2.

	$H_i\cap H_j\cap H_k$		$H_i\cap H_j$			H i
Boundary type	w 1	w 2	u 1	u1′	u 2=u2′	v 1	v1′	v 2=v2′
Pocock	2.56	2.56	2.42	2.21	2.42	2.18	1.96	2.18
O'Brien Fleming	3.33	2.36	3.14	2.23	2.22	2.80	1.96	1.98