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: "encoding monomorphic and polymorphic types"
  Abstract: Many automatic theorem provers are restricted to untyped logics, and existing translations from typed logics are bulky or unsound. Recent research proposes monotonicity as a means to remove some clutter when translating monomorphic to untyped first-order logic. Here we pursue this approach systematically, analysing formally a variety of encodings that further improve on efficiency while retaining soundness and completeness. We extend the approach to rank-1 polymorphism and present alternative schemes that lighten the translation of polymorphic symbols based on the novel notion of "cover". The new encodings are implemented in Isabelle/HOL as part of the Sledgehammer tool. We include informal proofs of soundness and correctness, and have formalised the monomorphic part of this work in Isabelle/HOL. Our evaluation finds the new encodings vastly superior to previous schemes.

Connected through hyperedge HE-1 (induced by source paper "grunge a grand unified atp challenge"):
  with members:
    - "learning to prove with tactics"
    - "the higher order prover leo iii"
    - "tactictoe learning to reason with hol4 tactics"
    - "premise selection and external provers for hol4"
    - "premise selection for mathematics by corpus analysis and kernel methods"
    - "learning assisted automated reasoning with flyspeck"

Connected through hyperedge HE-2 (induced by source paper "extensional higher order paramodulation in leo iii"):
  with members:
    - "grunge a grand unified atp challenge"
    - "computer science and metaphysics a cross fertilization"
    - "cut simulation and impredicativity"

Connected through hyperedge HE-3 (induced by source paper "a formalized general theory of syntax with bindings"):
  with members:
    - "general bindings and alpha equivalence in nominal isabelle"

Connected through hyperedge HE-4 (induced by source paper "premise selection and external provers for hol4"):
  with members:
    - "mizar 40 for mizar 40"
    - "matching concepts across hol libraries"
    - "blistr the blind strategymaker"
    - "hol y hammer online atp service for hol light"
    - "learning assisted automated reasoning with flyspeck"

Connected through hyperedge HE-5 (induced by source paper "initial experiments with tptp style automated theorem provers on acl2 problems"):
  with members:
    - "mizar 40 for mizar 40"
    - "premise selection for mathematics by corpus analysis and kernel methods"
    - "machine learner for automated reasoning 0 4 and 0 5"
    - "blistr the blind strategymaker"
    - "hol y hammer online atp service for hol light"
    - "theorem proving in large formal mathematics as an emerging ai field"
    - "learning assisted automated reasoning with flyspeck"
    - "atp and presentation service for mizar formalizations"

Connected through hyperedge HE-6 (induced by source paper "hol y hammer online atp service for hol light"):
  with members:
    - "mizar 40 for mizar 40"
    - "premise selection for mathematics by corpus analysis and kernel methods"
    - "lemma mining over hol light"
    - "blistr the blind strategymaker"
    - "formal mathematics on display a wiki for flyspeck"
    - "workingwiki a mediawiki based platform for collaborative research"
    - "learning assisted automated reasoning with flyspeck"
    - "atp and presentation service for mizar formalizations"

Connected through hyperedge HE-7 (induced by source paper "learning assisted automated reasoning with flyspeck"):
  with members:
    - "premise selection for mathematics by corpus analysis and kernel methods"
    - "blistr the blind strategymaker"
    - "a synthesis of the procedural and declarative styles of interactive theorem proving"
    - "theorem proving in large formal mathematics as an emerging ai field"
    - "atp and presentation service for mizar formalizations"
    - "large formal wikis issues and solutions"
    - "automated reasoning and presentation support for formalizing mathematics in mizar"
    - "proviola a tool for proof re animation"

Connected through hyperedge HE-8 (induced by source paper "machine learning in proof general interfacing interfaces"):
  with members:
    - "ml4pg in computer algebra verification"

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)