human: Given a node-centered hypergraph: <hypergraph>, where nodes represent papers and hyperedges represent sets of papers co-cited by a source paper.

Details of the hypergraph:
Center node: "proposition algebra"
  Abstract: Sequential propositional logic deviates from conventional propositional logic by taking into account that during the sequential evaluation of a propositional statement, atomic propositions may yield different Boolean values at repeated occurrences. We introduce “free valuations” to capture this dynamics of a propositional statement's environment. The resulting logic is phrased as an equationally specified algebra rather than in the form of proof rules, and is named “proposition algebra.” It is strictly more general than Boolean algebra to the extent that the classical connectives fail to be expressively complete in the sequential case. The four axioms for free valuation congruence are then combined with other axioms in order define a few more valuation congruences that gradually identify more propositional statements, up to static valuation congruence (which is the setting of conventional propositional logic).   Proposition algebra is developed in a fashion similar to the process algebra ACP and the program algebra PGA, via an algebraic specification which has a meaningful initial algebra for which a range of coarser congruences are considered important as well. In addition, infinite objects (i.e., propositional statements, processes and programs respectively) are dealt with by means of an inverse limit construction which allows the transfer of knowledge concerning finite objects to facts about infinite ones while reducing all facts about infinite objects to an infinity of facts about finite ones in return.

Connected through hyperedge HE-1 (induced by source paper "propositional logic with short circuit evaluation a non commutative and a commutative variant"):
  with members:
    - "an independent axiomatisation for free short circuit logic"
    - "satisfiability of short circuit logic"
    - "completeness for two left sequential logics"
    - "short circuit logic"
    - "sequential operators in computability logic"

Connected through hyperedge HE-2 (induced by source paper "an independent axiomatisation for free short circuit logic"):
  with members:
    - "evaluation trees for proposition algebra"

Connected through hyperedge HE-3 (induced by source paper "evaluation trees for proposition algebra"):
  with members:
    - "completeness for two left sequential logics"
    - "side effects in steering fragments"
    - "on hoare mccarthy algebras"
    - "short circuit logic"

Connected through hyperedge HE-4 (induced by source paper "satisfiability of short circuit logic"):
  with members:
    - "on hoare mccarthy algebras"
    - "short circuit logic"

Connected through hyperedge HE-5 (induced by source paper "decision taking for selling thread startup"):
  with members:
    - "instruction sequence processing operators"
    - "decision taking as a service"
    - "putting instruction sequences into effect"
    - "a survey of paraconsistent logics"
    - "stratified outsourcing theory"
    - "thread algebra for poly threading"
    - "steering fragments of instruction sequences"

Connected through hyperedge HE-6 (induced by source paper "decision taking as a service"):
  with members:
    - "instruction sequence processing operators"
    - "stratified outsourcing theory"
    - "informatics perspectives on decision taking a case study on resolving process product ambiguity"
    - "real islamic logic"
    - "searching publications on software testing"
    - "a static theory of promises"

Connected through hyperedge HE-7 (induced by source paper "decision taking versus action determination"):
  with members:
    - "instruction sequence processing operators"
    - "decision taking as a service"
    - "stratified outsourcing theory"

Connected through hyperedge HE-8 (induced by source paper "informatics perspectives on decision taking a case study on resolving process product ambiguity"):
  with members:
    - "instruction sequence processing operators"
    - "informaticology combining computer science data science and fiction science"
    - "putting instruction sequences into effect"
    - "stratified outsourcing theory"
    - "real islamic logic"
    - "formaleuros formalcoins and virtual monies"
    - "informal control code logic"
    - "searching publications on software testing"

Question: Please tell me which class the center node belongs to. The 40 classes are: cs.NA(Numerical Analysis), cs.MM(Multimedia), cs.LO(Logic in Computer Science), cs.CY(Computers and Society), cs.CR(Cryptography and Security), cs.DC(Distributed, Parallel, and Cluster Computing), cs.HC(Human-Computer Interaction), cs.CE(Computational Engineering, Finance, and Science), cs.NI(Networking and Internet Architecture), cs.CC(Computational Complexity), cs.AI(Artificial Intelligence), cs.MA(Multiagent Systems), cs.GL(General Literature), cs.NE(Neural and Evolutionary Computing), cs.SC(Symbolic Computation), cs.AR(Hardware Architecture), cs.CV(Computer Vision and Pattern Recognition), cs.GR(Graphics), cs.ET(Emerging Technologies), cs.SY(Systems and Control), cs.CG(Computational Geometry), cs.OH(Other Computer Science), cs.PL(Programming Languages), cs.SE(Software Engineering), cs.LG(Machine Learning), cs.SD(Sound), cs.SI(Social and Information Networks), cs.RO(Robotics), cs.IT(Information Theory), cs.PF(Performance), cs.CL(Computation and Language), cs.IR(Information Retrieval), cs.MS(Mathematical Software), cs.FL(Formal Languages and Automata Theory), cs.DS(Data Structures and Algorithms), cs.OS(Operating Systems), cs.GT(Computer Science and Game Theory), cs.DB(Databases), cs.DL(Digital Libraries), cs.DM(Discrete Mathematics). Directly output the class name.

gpt: cs.LO(Logic in Computer Science)