Table 1 Types of joint inversions (C_* represents a cycle with any number of runs, Δd(ρ) = 2 + Δλ(ρ)).

C _ε + C _*

C _*

0

2

$C_{\mathcal{A}}+C_{\mathcal{B}}$

$C_{\mathcal{A}\mathcal{B}}$

0

2

$C_{\mathcal{A}\mathcal{B}}+C_{\mathcal{A}\mathcal{B}}$

$C_{\mathcal{A}\mathcal{B}}$

-2

0

$C_{\mathcal{A}}+C_{\mathcal{A}}$

$C_{\mathcal{A}}$

-1

1

$C_{\mathcal{B}}+C_{\mathcal{B}}$

$C_{\mathcal{B}}$

-1

1

$C_{\mathcal{A}}+C_{\mathcal{A}\mathcal{B}}$

$C_{\mathcal{A}\mathcal{B}}$

-1

1

$C_{\mathcal{B}}+C_{\mathcal{A}\mathcal{B}}$

$C_{\mathcal{A}\mathcal{B}}$

-1

1