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: "on metric sorting for successive cancellation list decoding of polar codes"
  Abstract: We focus on the metric sorter unit of successive cancellation list decoders for polar codes, which lies on the critical path in all current hardware implementations of the decoder. We review existing metric sorter architectures and we propose two new architectures that exploit the structure of the path metrics in a log-likelihood ratio based formulation of successive cancellation list decoding. Our synthesis results show that, for the list size of L = 32, our first proposed sorter is 14% faster and 45% smaller than existing sorters, while for smaller list sizes, our second sorter has a higher delay in return for up to 36% reduction in the area.

Connected through hyperedge HE-1 (induced by source paper "polar codes and their quantum domain counterparts"):
  with members:
    - "reinforcement learning for nested polar code construction"
    - "decoder tailored polar code design using the genetic algorithm"
    - "genetic algorithm based polar code construction for the awgn channel"
    - "improved bit flipping algorithm for successive cancellation decoding of polar codes"
    - "design of polar codes in 5g new radio"
    - "belief propagation decoding of polar codes on permuted factor graphs"
    - "improved successive cancellation flip decoding of polar codes based on error distribution"
    - "belief propagation list decoding of polar codes"

Connected through hyperedge HE-2 (induced by source paper "two stage polarization based nonbinary polar codes for 5g urllc"):
  with members:
    - "parity check polar coding for 5g and beyond"
    - "a new construction of nonbinary polar codes with two stage polarization"
    - "efficient polar code construction for higher order modulation"
    - "construction of polar codes for arbitrary discrete memoryless channels"
    - "a comparative study of polar code constructions for the awgn channel"
    - "list decoding of polar codes"
    - "source and channel polarization over finite fields and reed solomon matrices"
    - "polar codes for q ary channels q 2 r"

Connected through hyperedge HE-3 (induced by source paper "a complexity reduction method for successive cancellation list decoding"):
  with members:
    - "on path memory in list successive cancellation decoder of polar codes"
    - "soft decision decoding of reed muller codes recursive lists"
    - "llr based successive cancellation list decoder for polar codes with multibit decision"
    - "fast and flexible successive cancellation list decoders for polar codes"
    - "partitioned successive cancellation list decoding of polar codes"
    - "a low latency list successive cancellation decoding implementation for polar codes"
    - "a high throughput list decoder architecture for polar codes"
    - "symbol decision successive cancellation list decoder for polar codes"

Connected through hyperedge HE-4 (induced by source paper "a new construction of nonbinary polar codes with two stage polarization"):
  with members:
    - "parity check polar coding for 5g and beyond"
    - "efficient polar code construction for higher order modulation"
    - "construction of polar codes for arbitrary discrete memoryless channels"
    - "a comparative study of polar code constructions for the awgn channel"
    - "polar codes for q ary channels q 2 r"
    - "non binary polar codes using reed solomon codes and algebraic geometry codes"
    - "channel polarization a method for constructing capacity achieving codes for symmetric binary input memoryless channels"
    - "polar codes characterization of exponent bounds and constructions"

Connected through hyperedge HE-5 (induced by source paper "a method for low complexity successive cancellation list decoding of polar codes"):
  with members:
    - "fast list decoders for polar codes"
    - "list decoding of polar codes"

Connected through hyperedge HE-6 (induced by source paper "partial selection for successive cancellation list decoding of polar codes"):
  with members:
    - "fast list decoders for polar codes"
    - "list decoding of polar codes"

Connected through hyperedge HE-7 (induced by source paper "polarbear a 28 nm fd soi asic for decoding of polar codes"):
  with members:
    - "comparison of polar decoders with existing low density parity check and turbo decoders"
    - "multi mode unrolled architectures for polar decoders"
    - "a low latency list successive cancellation decoding implementation for polar codes"
    - "a high throughput list decoder architecture for polar codes"
    - "fast list decoders for polar codes"
    - "flexible and low complexity encoding and decoding of systematic polar codes"
    - "llr based successive cancellation list decoding of polar codes"
    - "fast polar decoders algorithm and implementation"

Connected through hyperedge HE-8 (induced by source paper "a low latency list successive cancellation decoding implementation for polar codes"):
  with members:
    - "symbol decision successive cancellation list decoder for polar codes"
    - "llr based successive cancellation list decoding of polar codes"
    - "low latency list decoding of polar codes with double thresholding"
    - "symbol based successive cancellation list decoder for polar codes"
    - "fast polar decoders algorithm and implementation"
    - "finite length scaling for polar codes"
    - "increasing the speed of polar list decoders"
    - "a reduced latency list decoding algorithm for polar codes"

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.AR(Hardware Architecture)