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Locally C1-cofinite genus-zero open-closed OPE data
Definition
Fix a positive-graded chiral vertex operator algebra with and put . Here positive-graded has the exact conformal-vector, Virasoro, finite-dimensional weight-space, and CFT-type conventions of Conformal vertex algebra of CFT type. Use the ordinary non-super mode convention. The source category consists of -modules with locally finite , finite-dimensional generalized eigenspaces , and a finite set such that . Also require to have finite codimension and the source restricted-dual module to be finitely generated by a finite subset under the -modes. The restricted-dual space and opposite-field action are those in Contragredient module of a generalized module. That item defines the candidate action but explicitly leaves its module axioms to a separate theorem; The restricted dual with opposite action is a contragredient module supplies the actual module used here. Finite-coset support, finite-dimensional generalized weight spaces, -cofiniteness, and dual finite generation are separate clauses; the R2 -quotient condition alone is not this source category.
For any such generalized modules , write for the logarithmic intertwining-operator space of Logarithmic intertwining operator. Define where is the source expansion. Thus is the no-log subspace on generalized modules. It is not an assertion that generalized modules are ordinary; when all three modules are ordinary it agrees with the ordinary intertwining-operator space defined in Intertwining-operator space and fusion multiplicity. All OPE coefficients below are required to lie in these no-log spaces, while analytic continuation of their blocks is allowed to acquire logarithmic terms.
The locally -cofinite full bulk data over consist of a countable index set and pairs of source-category modules, with satisfying integral-spin support ( unless ), common lower bounds on , and finite-dimensional cumulative spaces . Require as a -module, the two chiral copies of to embed in the left and right kernels of the full translation modes, and for each a finite set containing every intermediate label in the full OPE of with . For each pair the module-valued OPE coefficient lies in The two factors are respectively for the left and right copies of . Define the source graded dual by .
The locally -cofinite boundary data over consist of a countable index set and a decomposition into source-category modules, with finite-dimensional cumulative spaces , and a finite set supporting each boundary OPE of with . Require for every , where is the conformal zero mode of the prescribed boundary -action specified below. Thus the displayed boundary decomposition is its conformal eigenspace grading, not an independent regrading of the underlying module. For each pair the boundary OPE coefficient lies in . Set . For each the bulk-to-boundary operator restricted to lies in the finite direct sum for a finite set , where this notation denotes the no-log generalized-module intertwiner space just defined.
The full and boundary algebra axioms are additional premises distinct from local -cofinite decompositions. The precise full-vertex-algebra clauses are Moriwaki Definition 3.1 and its energy-momentum-tensor conditions preceding Proposition 3.5; the boundary clauses are equation (3.10) and Definition 3.15. Definitions 3.6 and 3.19 add the finite-support/local- clauses to these algebras; they do not replace the algebra axioms. Adopt the following explicit content.
For the bulk, give a nonzero vacuum and a linear formal field map For each fixed pair of states, its exponent support is bounded below in each variable and finite below every bound on the sum of the two exponents; only integer differences of the two exponents occur. For homogeneous its modes obey the grading rule . Require , , and constant term . The coefficient fields use the actual full mode products, not a product inferred from the unrelated R5 field-label space.
For every three homogeneous bulk states and every homogeneous restricted-dual functional , require absolute convergence of the product when , of the iterate when , and of the reversed product when . They must be the respective channel expansions of one single-valued real-analytic function on , with in the iterate. This is the three-channel full-algebra axiom, independent of the later bulk-to-boundary bootstrap.
Define and as the coefficients of and in . Give conformal vectors and with . Require and to give commuting Virasoro actions with the declared central charges, , , , and . The lower bounds and finite cumulative weight spaces are the ones required above. These are the energy-momentum data of the full VOA; they are not inferred merely from the decomposition as a -module.
For the boundary, give a nonzero and a linear map with : for each real bound , only finitely many exponents at most occur. For the prescribed -module action and , require Here , , and coefficientwise lower truncation makes each action meaningful. Require , with constant term , and the following ordered associativity axiom. For and , the product and iterate series converge absolutely on their product and iterate nested domains, respectively, and restrict to one real-analytic function on . Its product expression is , and its iterate expression is on . Complex powers use the declared branches. Boundary commutativity is not an extra axiom.
To type the chiral embeddings, specify injective linear maps and carrying the vacuum to and the conformal vector to , respectively. The left image lies in and the right image in . Require the full-field identities and , where the right sides are the specified -module actions. Their mode products on the respective images satisfy and . On the boundary require , the specified module field. Thus the mode actions and product-preservation interfaces used below are actually supplied. The two chiral actions commute, and are the conformal-vector modes of the boundary -action.
Write for the full, boundary, and bulk-to-boundary OPE maps, respectively; is specified explicitly below. Thus denote the two chiral mode actions on , the boundary mode action on , and their translation modes.
More explicitly, the bulk-to-boundary field is a linear map , , with the source's mode actions on and on . It satisfies, for , , and , and The sums are interpreted coefficientwise with the module truncation convention in the source. These are the bulk-boundary covariance identities of Moriwaki, Definition 3.22 and equation (3.15); its Definition 3.28 imposes the finite support . These finite-support requirements are separate from -cofiniteness of an individual module.
We fix the source's explicit tree domains. For a binary tree with leaves labelled by distinct coordinates , let and be its internal vertices and internal edges, and let be the root. For each internal vertex , let be the label of the rightmost leaf below , and let be the label of the rightmost leaf in the left child subtree of . Put . If joins a child vertex to its parent , put . Let be the rightmost leaf label, set and , and use the tree-coordinate map . A positive radius tuple is -admissible when the full product region in these coordinates, with , , and , maps into the distinct-point configuration space. Let and . Define For the zero-input vacuum tree , set and . For the one-input identity tree , set and . These cases have no root-scale or internal-edge coordinates. For a two-coloured tree with bulk and boundary leaves, define its doubled chiral tree recursively using its typed vertices. An open leaf is retained. Open multiplication becomes ordinary binary multiplication of the doubled open subtrees. A closed subtree entering the bulk-to-boundary vertex becomes the binary tree , where is a copy of the entire closed subtree with barred leaf labels. Inserting a closed subtree at a closed leaf therefore inserts and at the corresponding paired chiral leaves. The coordinate tuple below interleaves the labels ; their order in a doubled tree need not be adjacent. In particular doubles to , whereas doubles to ; these are distinct channel trees. Set For a bulk tree with bulk leaves, use its ordinary nested domain in each chiral coordinate copy and define Thus the holomorphic and antiholomorphic bulk OPE series live on , and their restriction is real analytic on . For zero or one bulk leaf the corresponding closed OPE is the declared vacuum or state-field map on or , respectively, with no internal projection sum. The same pullback convention gives for the zero-input open vacuum tree and for the single open leaf; a single bulk leaf entering a bulk-to-boundary vertex still doubles to two chiral leaves and uses the two-leaf domain. Branches of all real powers use the principal logarithm on .
The genus-zero bulk-boundary bootstrap data are these five channel conditions:
- The bulk vacuum maps to the boundary vacuum.
- For , a restricted-dual functional , and with , the two series and are absolutely convergent respectively when and are restrictions of one single-valued real-analytic function on .
- For , , , , and , the series are absolutely convergent respectively on , and on , , and are restrictions of one single-valued real-analytic function on .
The configuration space is ; when open leaves are ordered, use the chamber . The five equations counted by the source are the vacuum identity and the two ordered expansions in each of conditions 2 and 3. This definition records the exact analytic and finite-support package; it does not assert existence of a physical CFT or a path-integral measure.
Definition references
C1-cofinite generalized module in the ungraded HLZ convention
Contragredient module of a generalized module
The restricted dual with opposite action is a contragredient module
Strongly graded generalized module in the HLZ setting
Intertwining-operator space and fusion multiplicity
Logarithmic intertwining operator
Full local two-dimensional CFT data
Bordered analytic worldsheet with marked collars
Conformal boundaries, boundary-changing fields, and defects
Binary-tree insertion coordinates are biholomorphic
Remarks
The quoted C1 quotient, dual finite generation, finite intermediate-label support, boundary finite support, and finite bulk-to-boundary support are distinct clauses. The R2 quotient definition supplies only the first. The no-log requirement is imposed inside the logarithmic intertwiner spaces for generalized modules; this keeps the tree-block and theorem types aligned without treating generalized modules as ordinary. In particular, the higher-genus sewing and the annulus Cardy condition are not included.
Moriwaki's Theorem 3.30 uses the analytic convergence theorem for iterated intertwining-operator products and the two-colored parenthesized permutation-braid action. Those results are not included in this definition; their local proof status is recorded in the consuming theorem. This item specifies the data and bootstrap interfaces, not the convergence theorem.
Depends on
C1-cofinite generalized module in the ungraded HLZ convention
Contragredient module of a generalized module
The restricted dual with opposite action is a contragredient module
Strongly graded generalized module in the HLZ setting
Intertwining-operator space and fusion multiplicity
Logarithmic intertwining operator
Full local two-dimensional CFT data
Bordered analytic worldsheet with marked collars
Conformal boundaries, boundary-changing fields, and defects
Binary-tree insertion coordinates are biholomorphic
Conformal vertex algebra of CFT type
Module for an ordinary vertex algebra