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: "new permutation trinomials from niho exponents over finite fields with even characteristic"
  Abstract: In this paper, a class of permutation trinomials of Niho type over finite fields with even characteristic is further investigated. New permutation trinomials from Niho exponents are obtained from linear fractional polynomials over finite fields, and it is shown that the presented results are the generalizations of some earlier works.

Connected through hyperedge HE-1 (induced by source paper "on a conjecture about a class of permutation quadrinomials"):
  with members:
    - "new permutation trinomials constructed from fractional polynomials"
    - "new classes of permutation binomials and permutation trinomials over finite fields"

Connected through hyperedge HE-2 (induced by source paper "two types of permutation polynomials with special forms"):
  with members:
    - "new constructions of permutation polynomials of the form x rh left x q 1 right over mathbb f _ q 2"
    - "several classes of permutation trinomials from niho exponents"
    - "permutations via linear translators"
    - "new permutation trinomials constructed from fractional polynomials"
    - "new classes of permutation binomials and permutation trinomials over finite fields"
    - "permutation trinomials over finite fields with even characteristic"
    - "further results on permutation polynomials over finite fields"

Connected through hyperedge HE-3 (induced by source paper "a new class of permutation trinomials constructed from niho exponents"):
  with members:
    - "several classes of permutation trinomials from niho exponents"
    - "several classes of permutation trinomials over mathbb f_ 5 n from niho exponents"
    - "new permutation trinomials constructed from fractional polynomials"
    - "on two conjectures about permutation trinomials over mathbb f _ 3 2k"
    - "new classes of permutation binomials and permutation trinomials over finite fields"
    - "permutation trinomials over finite fields with even characteristic"

Connected through hyperedge HE-4 (induced by source paper "several classes of permutation trinomials over mathbb f_ 5 n from niho exponents"):
  with members:
    - "several classes of permutation trinomials from niho exponents"
    - "new permutation trinomials constructed from fractional polynomials"
    - "on two conjectures about permutation trinomials over mathbb f _ 3 2k"

Connected through hyperedge HE-5 (induced by source paper "on two conjectures about permutation trinomials over mathbb f _ 3 2k"):
  with members:
    - "several classes of permutation trinomials from niho exponents"
    - "new permutation trinomials constructed from fractional polynomials"
    - "new classes of permutation binomials and permutation trinomials over finite fields"

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.IT(Information Theory)