13.7 Cluster logarithms with repeated occurrences
Let be symmetric incompatibility with
) for every label, and nonempty supports
such that incompatibility implies intersection. For real activities the hard-core gas is
Searchable transcription
Z(w) = X Y i∈A wi, A compatible
including the empty subset. The logarithm instead uses ordered occurrence tuples with repetitions. On their incompatibility graph, define
Searchable transcription
φ(z) = X (−1)|E(H)|, H connected H⊆incompatibility graph n Y L(w) = X X 1 n! z∈In φ(z) j=1 wij. n≥1
A singleton graph has coefficient one. Equal labels at different positions are incompatible, essential even though the gas uses distinct subsets. Breadth-first exploration partitions connected subgraphs into intervals with one fixed spanning tree as lower endpoint and an allowed edge set as upper endpoint. These intervals cancel by optional-edge toggling; each remaining interval is one tree. In each interval, if an optional edge exists, toggling that edge is a sign-reversing involution, so the alternating sum is zero. Thus is bounded by the number of compatible rooted spanning trees. Cancellation is performed inside the connected-graph sum before taking absolute values. Assume
1 and
Searchable transcription
X i:x∈Xi |wi|e(a+δ)cB(Xi) ≤γ, 4(2B + 1)4γ δ ≤q. sup x
The designated-root estimate bounds size- clusters with root-activity budget
by
, normalized by 1
1)!. For an unrooted cluster containing a label with a chosen property, sum possible marked root positions and divide by
; its 1
! normalization is bounded by that rooted expression. Tuple relabeling preserves graph coefficients and products, including repeated labels. If the union contains
, root at an occurrence containing
, with
. A nonzero connected coefficient has overlap-connected union; meeting-support induction and
0 give
Searchable transcription
eacB(∪jXij ) ≤ Y j eacB(Xij ).
Summing+1 bounds the absolute logarithmic terms containing
, with actual union-support price, by
). Summing site root bounds proves absolute convergence at fixed torus with total at most
Λ
). The lift retains occurrence tuples, incompatibility edges, root positions and factorials. Recovery commutes with the finite graph cancellation and preserves the union-support inequality. Nonnegative absolute majorants then justify the same infinite occurrence sum, without identifying tuples that share the same label set.
The interval cancellation is itself a recoverable finite operation. Order potential edges by their recorded endpoint orders. For each tree interval with an optional edge, choose its least optional edge and map
to
. This operation stays in the same interval, squares to the identity and reverses (
. Readout retains endpoint orders, depths and the least-parent rule, hence recovers both
and this involution before any absolute value is taken. For each finite occurrence
tuple the resulting is therefore identical on recovery. The section also recovers every tuple position, including positions carrying equal labels. The subsequent root-position sum keeps its
! normalization, while distinct-set relabelling keeps its separate
! cancellation. Finally the nonnegative bound
) controls the recovered size tail with its actual union support. This gives an absolute majorant for passage from finite tuples to the full lifted connected series.
13.8 The real logarithmic identity
Searchable transcription
Positivity of the gas is a conclusion of the identity. First restrict to a finite alphabet of s labels and put P(t) = Z(tw), L(t) = P n≥1 lntn. Connected-component decomposition, designating one occurrence and choosing its component and remaining graph, gives
Searchable transcription
n X n[P]n = k=1 klk[P]n−k.
Searchable transcription
Position choices and component factorials give precisely this normalization. The cluster estimate gives |ln| ≤Cqn−1. Choose u > 1 with qu < 1. The series and differentiated series converge uniformly on compact subsets of (−u, u), using the summable derivative majorant Cn(qu)n−1. The recurrence yields P ′ = L′P, so (Pe−L)′ = 0. Its value at zero is one, giving P(1) = eL(1). For arbitrary alphabets direct finite subsets by inclusion. Every fixed gas subset and occurrence tuple eventually appears unchanged. Dropping exclusions gives absolute gas majorant Q i(1 + |wi|) ≤ e P i |wi|, finite by sitewise budgets at fixed torus. The connected-series absolute majorant was established above. Dominated convergence on both sides proves
Searchable transcription
Z(w) = eL(w) > 0, log Z(w) = L(w).
Removing all labels incompatible with a specified forced set only decreases absolute budgets, so the same identity applies. In the lift, coefficientwise recovery preserves the finite component recurrence. The retained absolute majorants justify passage through readout to the directed-alphabet limit; thus the recovered positive gas and its real logarithm obey this exact identity with the source’s occurrence normalization.
Write and
for the gas and connected series restricted to a finite alphabet
. For a parameterized physical activity family
), its lifted family is
)). The finite graph and occurrence identities established above give
Searchable transcription
ZD(wZ) = ZD(w) ◦π, LD(wZ) = LD(w) ◦π.