. 2014 Dec 24;64(3):416–431. doi: 10.1093/sysbio/syu129

Table 1.

Notation

Notation	Description
$H$	Host tree.
$P$	Parasite tree.
$ϕ$	Function from the leaves of $P$ to the leaves of $H$ . It represents the associations between currently living host species and parasites.
$γ$	Function from the vertices of $P$ to the vertices of $H$ . It represents the reconciliation between $H$ and $P$ and extends $ϕ$ .
$Σ, Δ, Γ$	Sets of parasite vertices associated with, respectively, cospeciation, duplication, and host switch events.
$Ξ$	Set containing arcs of the parasite tree that are associated to host switch events.
$Λ$	Multiset containing all vertices $h \in V (H)$ that are associated to loss events.
$D_{0}$	Observed data.
$D_{S}$	Generated data.
$Θ$	Parameter space.
$θ$	Parameter value.
$\tilde{P}$	Simulated parasite tree.
$p_{i}$	Probability of the event $i$ , where $i \in {c, d, s, l}$ .
$c_{i}$	Cost of the event $i$ , where $i \in {c, d, s, l}$ .
$o_{i}$	Number of observed events of the type $i$ , where $i \in {c, d, s, l}$ .

Note: $c =$ cospeciation, $d =$ duplication, $s =$ host switch, and $l =$ loss.