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: "optimization hardness as transient chaos in an analog approach to constraint satisfaction"
  Abstract: Constraint-satisfaction problems are among the computationally hardest tasks: solutions are efficiently checkable, but no efficient algorithms are known to compute those solutions. Fresh insight might come from physics. A study mapping optimization hardness onto the phenomena of turbulence and chaos suggests that constraint-satisfaction problems can be tackled using analog devices.

Connected through hyperedge HE-1 (induced by source paper "continuous time systems for solving 0 1 integer linear programming feasibility problems"):
  with members:
    - "0 1 integer linear programming with a linear number of constraints"
    - "recurrent neural network regularization"
    - "speech recognition with deep recurrent neural networks"

Connected through hyperedge HE-2 (induced by source paper "continuous relaxations for the traveling salesman problem"):
  with members:
    - "a spectral assignment approach for the graph isomorphism problem"
    - "hearing the clusters in a graph a distributed algorithm"

Connected through hyperedge HE-3 (induced by source paper "oim oscillator based ising machines for solving combinatorial optimisation problems"):
  with members:
    - "efficient analog circuits for boolean satisfiability"

Connected through hyperedge HE-4 (induced by source paper "a survey on analog models of computation"):
  with members:
    - "real time computability of real numbers by chemical reaction networks"
    - "robustness of expressivity in chemical reaction networks"
    - "efficient analog circuits for boolean satisfiability"
    - "axiomatizing analog algorithms"
    - "homonym population protocols"
    - "physical computation p poly and p log"
    - "a uniform substitution calculus for differential dynamic logic"
    - "on recurrent reachability for continuous linear dynamical systems"

Connected through hyperedge HE-5 (induced by source paper "memristors for the curious outsiders"):
  with members:
    - "a neuromorphic systems approach to in memory computing with non ideal memristive devices from mitigation to exploitation"
    - "hierarchical temporal memory using memristor networks a survey"
    - "thermodynamic ram technology stack"
    - "perspective memcomputing leveraging memory and physics to compute efficiently"
    - "the case for rejecting the memristor as a fundamental circuit element"
    - "vertex coloring of graphs via phase dynamics of coupled oscillatory networks"
    - "polynomial time solution of prime factorization and np complete problems with digital memcomputing machines"
    - "temporal correlation detection using computational phase change memory"

Connected through hyperedge HE-6 (induced by source paper "vertex coloring of graphs via phase dynamics of coupled oscillatory networks"):
  with members:
    - "an event based architecture for solving constraint satisfaction problems"
    - "memcomputing np complete problems in polynomial time using polynomial resources and collective states"
    - "a new look at the easy hard easy pattern of combinatorial search difficulty"

Connected through hyperedge HE-7 (induced by source paper "efficient analog circuits for boolean satisfiability"):
  with members:
    - "an event based architecture for solving constraint satisfaction problems"

Connected through hyperedge HE-8 (induced by source paper "an event based architecture for solving constraint satisfaction problems"):
  with members:
    - "memory and information processing in neuromorphic systems"
    - "neuromorphic electronic circuits for building autonomous cognitive systems"
    - "survey propagation an algorithm for satisfiability"

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.CC(Computational Complexity)