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: "permutation trinomials over finite fields with even characteristic"
  Abstract: Permutation polynomials have been a subject of study for a long time and have applications in many areas of science and engineering. However, only a small number of specific classes of permutation polynomials are described in the literature so far. In this paper we present a number of permutation trinomials over finite fields, which are of different forms.

Connected through hyperedge HE-1 (induced by source paper "some results about permutation properties of a kind of binomials over finite fields"):
  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"

Connected through hyperedge HE-2 (induced by source paper "necessities and sufficiencies of a class of permutation polynomials over finite fields"):
  with members:
    - "constructions and necessities of some permutation polynomials"
    - "two types of permutation polynomials with special forms"

Connected through hyperedge HE-3 (induced by source paper "constructions and necessities of some permutation polynomials"):
  with members:
    - "several classes of permutation trinomials from niho exponents"
    - "new classes of permutation binomials and permutation trinomials over finite fields"

Connected through hyperedge HE-4 (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 from niho exponents over finite fields with even characteristic"
    - "new permutation trinomials constructed from fractional polynomials"
    - "new classes of permutation binomials and permutation trinomials over finite fields"
    - "further results on permutation polynomials over finite fields"

Connected through hyperedge HE-5 (induced by source paper "constructions of involutions over finite fields"):
  with members:
    - "several classes of permutation trinomials from niho exponents"
    - "new classes of permutation binomials and permutation trinomials over finite fields"

Connected through hyperedge HE-6 (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 from niho exponents over finite fields with even characteristic"
    - "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"

Connected through hyperedge HE-7 (induced by source paper "several classes of permutation trinomials from niho exponents"):
  with members:
    - "new classes of permutation binomials and permutation trinomials over finite fields"

Connected through hyperedge HE-8 (induced by source paper "new permutation trinomials from niho exponents over finite fields with even characteristic"):
  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"
    - "a triple error correcting cyclic code from the gold and kasami welch apn power functions"

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)