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: "regularization techniques for learning with matrices"
  Abstract: There is growing body of learning problems for which it is natural to organize the parameters into matrix, so as to appropriately regularize the parameters under some matrix norm (in order to impose some more sophisticated prior knowledge). This work describes and analyzes a systematic method for constructing such matrix-based, regularization methods. In particular, we focus on how the underlying statistical properties of a given problem can help us decide which regularization function is appropriate. #R##N#Our methodology is based on the known duality fact: that a function is strongly convex with respect to some norm if and only if its conjugate function is strongly smooth with respect to the dual norm. This result has already been found to be a key component in deriving and analyzing several learning algorithms. We demonstrate the potential of this framework by deriving novel generalization and regret bounds for multi-task learning, multi-class learning, and kernel learning.

Connected through hyperedge HE-1 (induced by source paper "distributed learning with sublinear communication"):
  with members:
    - "introduction to online convex optimization"
    - "space lower bounds for linear prediction"
    - "geometric lower bounds for distributed parameter estimation under communication constraints"
    - "communication compression for decentralized training"
    - "detecting correlations with little memory and communication"
    - "distributed simulation and distributed inference"
    - "sparsified sgd with memory"
    - "inference under information constraints i lower bounds from chi square contraction"

Connected through hyperedge HE-2 (induced by source paper "learning vector valued functions with local rademacher complexity"):
  with members:
    - "but how does it work in theory linear svm with random features"
    - "a survey on multi task learning"
    - "orthogonal random features"
    - "a vector contraction inequality for rademacher complexities"
    - "an overview of gradient descent optimization algorithms"
    - "multi class svms from tighter data dependent generalization bounds to novel algorithms"
    - "on the equivalence between kernel quadrature rules and random feature expansions"
    - "adam a method for stochastic optimization"

Connected through hyperedge HE-3 (induced by source paper "learning vector valued functions with local rademacher complexity and unlabeled data"):
  with members:
    - "but how does it work in theory linear svm with random features"
    - "data dependent generalization bounds for multi class classification"
    - "a survey on multi task learning"
    - "orthogonal random features"
    - "a vector contraction inequality for rademacher complexities"
    - "multi class svms from tighter data dependent generalization bounds to novel algorithms"
    - "adam a method for stochastic optimization"
    - "generalized singular value thresholding"

Connected through hyperedge HE-4 (induced by source paper "generalization bounds in the predict then optimize framework"):
  with members:
    - "task based end to end model learning in stochastic optimization"
    - "a vector contraction inequality for rademacher complexities"
    - "multi class svms from tighter data dependent generalization bounds to novel algorithms"
    - "optimal learners for multiclass problems"
    - "multiclass learnability and the erm principle"

Connected through hyperedge HE-5 (induced by source paper "convergence of online mirror descent"):
  with members:
    - "distributed learning with regularized least squares"
    - "unregularized online learning algorithms with general loss functions"
    - "a simpler approach to obtaining an o 1 t convergence rate for the projected stochastic subgradient method"
    - "making gradient descent optimal for strongly convex stochastic optimization"

Connected through hyperedge HE-6 (induced by source paper "exponentiated gradient meets gradient descent"):
  with members:
    - "introduction to online convex optimization"
    - "near optimal algorithms for online matrix prediction"

Connected through hyperedge HE-7 (induced by source paper "handling concept drift via model reuse"):
  with members:
    - "hybrid forest a concept drift aware data stream mining algorithm"
    - "introduction to online convex optimization"
    - "robust artificial intelligence and robust human organizations"
    - "adaptive online learning in dynamic environments"
    - "learn on source refine on target a model transfer learning framework with random forests"
    - "concept drift adaptation by exploiting historical knowledge"
    - "fast rates by transferring from auxiliary hypotheses"
    - "a vector contraction inequality for rademacher complexities"

Connected through hyperedge HE-8 (induced by source paper "contextual bandits with surrogate losses margin bounds and efficient algorithms"):
  with members:
    - "practical contextual bandits with regression oracles"
    - "non convex learning via stochastic gradient langevin dynamics a nonasymptotic analysis"
    - "improved regret bounds for oracle based adversarial contextual bandits"
    - "making contextual decisions with low technical debt"
    - "efficient algorithms for adversarial contextual learning"
    - "taming the monster a fast and simple algorithm for contextual bandits"
    - "the price of bandit information in multiclass online classification"
    - "contextual bandit learning with predictable rewards"

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.LG(Machine Learning)