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: "quantum alternation prospects and problems"
  Abstract: We propose a notion of quantum control in a quantum programming language which permits the superposition of finitely many quantum operations without performing a measurement. This notion takes the form of a conditional construct similar to the IF statement in classical programming languages. We show that adding such a quantum IF statement to the QPL programming language simplifies the presentation of several quantum algorithms. This motivates the possibility of extending the denotational semantics of QPL to include this form of quantum alternation. We give a denotational semantics for this extension of QPL based on Kraus decompositions rather than on superoperators. Finally, we clarify the relation between quantum alternation and recursion, and discuss the possibility of lifting the semantics defined by Kraus operators to the superoperator semantics defined by Selinger.

Connected through hyperedge HE-1 (induced by source paper "realizability in the unitary sphere"):
  with members:
    - "a concrete categorical semantics of lambda s"
    - "enriching a linear non linear lambda calculus a programming language for string diagrams"
    - "typing quantum superpositions and measurement"
    - "call by value call by name and the vectorial behaviour of the algebraic λ calculus"
    - "quipper a scalable quantum programming language"
    - "applying quantitative semantics to higher order quantum computing"
    - "a system f accounting for scalars"
    - "a lambda calculus for quantum computation with classical control"

Connected through hyperedge HE-2 (induced by source paper "from symmetric pattern matching to quantum control extended version"):
  with members:
    - "a categorical foundation for structured reversible flowchart languages soundness and adequacy"
    - "the vectorial λ calculus"
    - "call by value call by name and the vectorial behaviour of the algebraic λ calculus"
    - "quipper a scalable quantum programming language"

Connected through hyperedge HE-3 (induced by source paper "semantics of higher order quantum computation via geometry of interaction"):
  with members:
    - "wave style token machines and quantum lambda calculi"
    - "quipper a scalable quantum programming language"
    - "applying quantitative semantics to higher order quantum computing"
    - "on multiplicative linear logic modality and quantum circuits"
    - "confluence results for a quantum lambda calculus with measurements"
    - "generic trace semantics via coinduction"

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.PL(Programming Languages)