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FIG. 10.2 The full two-particle vertex F σ σ ′ k k ′ q can be divided into a sum of the set of diagrams, which are two-particle fully irreducible Λ σ σ ′ k k ′ q and the set of diagrams, which are two particle reducible in a given channel More about this image found in The full two-particle vertex F σ σ ′ k k ′ q can...

, P₃, P₂, and P₄ [note that in G_poly1, the vertex P₁ is followed by vertex P₃ (not P₂)]. G_poly2 is determined by the sequence of distinct More about this image found in A self-intersecting polygon G...

FIG. 10.24 A convex polygon G_poly1. Also shown is a non-convex polygon G_poly2. Note that the interior angle ∠ 7 of vertex P₇ of the polygon G_poly2 is a concave More about this image found in A convex polygon G_poly...

FIG. 13.8 On the left, an equilateral triangle G_triangle with a common length of sides R_len, and a distance R_h (height) between a vertex P and the opposite side. Also shown is line More about this image found in On the left, an equilateral triangle G...

FIG. 4.10 Fluctuation-exchange (FLEX) diagrams: (a) electron–hole interaction, (b) electron–electron or hole–hole interactions, and (c) particle–hole vertex corresponding to the interaction channel. More about this image found in Fluctuation-exchange (FLEX) diagrams: (a) electron–hole interaction, (b) el...

¯ ∪ P 3 P 4 ¯ ∪ P 4 P 1 ¯ . Also shown are the two angles ∠ 1 and ∠ 2 determined by the vertex P₁ and the polygonal G_poly. More about this image found in A polygon G_poly determined by ...

FIG. 10.1 Definition of the generalized susceptibility χ σ σ ′ k k ′ q in terms of the two-particle vertex function F σ σ ′ k k ′ q . Adapted from Rohringer, G. et al., Rev. Modern Phys. 90 , 025003 (2018). Copyright 2018 American More about this image found in Definition of the generalized susceptibility χ σ σ ′ k k ...