(a)
(b)
(c)
Figure 1:
Triangle types contributing to the bispectrum corresponding to “squeezed” or local configurations with
k
3
≪
k
1
,
k
2
(a), equilateral configurations with
k
3
≈
k
1
≈
k
2
(b), and flattened configurations with
k
3
≈
k
1
+
k
2
(c).