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: "almost optimal cover free families"
  Abstract: Roughly speaking, an $(n,(r,s))$-Cover Free Family (CFF) is a small set of $n$-bit strings such that: "in any $d:=r+s$ indices we see all patterns of weight $r$". CFFs have been of interest for a long time both in discrete mathematics as part of block design theory, and in theoretical computer science where they have found a variety of applications, for example, in parametrized algorithms where they were introduced in the recent breakthrough work of Fomin, Lokshtanov and Saurabh under the name `lopsided universal sets'. #R##N#In this paper we give the first explicit construction of cover-free families of optimal size up to lower order multiplicative terms, {for any $r$ and $s$}. In fact, our construction time is almost linear in the size of the family. Before our work, such a result existed only for $r=d^{o(1)}$. and $r= \omega(d/(\log\log d\log\log\log d))$. As a sample application, we improve the running times of parameterized algorithms from the recent work of Gabizon, Lokshtanov and Pilipczuk.

Connected through hyperedge HE-1 (induced by source paper "exact learning from an honest teacher that answers membership queries"):
  with members:
    - "exact learning of juntas from membership queries"
    - "progress on polynomial identity testing ii"
    - "linear time constructions of some d restriction problems"
    - "on exact learning monotone dnf from membership queries"
    - "learning boolean halfspaces with small weights from membership queries"
    - "bounds on the rate of disjunctive codes"
    - "efficient computation of representative sets with applications in parameterized and exact algorithms"
    - "analytical approach to parallel repetition"

Connected through hyperedge HE-2 (induced by source paper "deterministic protocols in the sinr model without knowledge of coordinates"):
  with members:
    - "achieving dilution without knowledge of coordinates in the sinr model"
    - "deterministic backbone creation in an sinr network without knowledge of location"
    - "multi broadcasting under the sinr model"
    - "distributed communication in bare bones wireless networks"
    - "beyond geometry towards fully realistic wireless models"
    - "on the impact of geometry on ad hoc communication in wireless networks"
    - "distributed deterministic broadcasting in uniform power ad hoc wireless networks"
    - "towards tight bounds for local broadcasting"

Connected through hyperedge HE-3 (induced by source paper "how hard is it to satisfy almost all roommates"):
  with members:
    - "stable marriage with multi modal preferences"
    - "stable marriage with groups of similar agents"
    - "balanced stable marriage how close is close enough"
    - "the stable roommates problem with short lists"
    - "stable marriage with covering constraints a complete computational trichotomy"
    - "linear time constructions of some d restriction problems"
    - "designing fpt algorithms for cut problems using randomized contractions"
    - "acyclic preference systems in p2p networks"

Connected through hyperedge HE-4 (induced by source paper "deterministic backbone creation in an sinr network without knowledge of location"):
  with members:
    - "achieving dilution without knowledge of coordinates in the sinr model"
    - "deterministic protocols in the sinr model without knowledge of coordinates"
    - "distributed bare bones communication in wireless networks"
    - "multi broadcasting under the sinr model"
    - "distributed communication in bare bones wireless networks"
    - "distributed deterministic broadcasting in wireless networks under the sinr model"

Connected through hyperedge HE-5 (induced by source paper "achieving dilution without knowledge of coordinates in the sinr model"):
  with members:
    - "deterministic protocols in the sinr model without knowledge of coordinates"
    - "deterministic backbone creation in an sinr network without knowledge of location"
    - "multi broadcasting under the sinr model"
    - "distributed deterministic broadcasting in wireless networks under the sinr model"

Connected through hyperedge HE-6 (induced by source paper "derandomizing chernoff bound with union bound with an application to k wise independent sets"):
  with members:
    - "linear time constructions of some d restriction problems"
    - "balanced families of perfect hash functions and their applications"

Connected through hyperedge HE-7 (induced by source paper "non adaptive learning a hidden hipergraph"):
  with members:
    - "linear time constructions of some d restriction problems"
    - "on exact learning monotone dnf from membership queries"

Connected through hyperedge HE-8 (induced by source paper "on exact learning monotone dnf from membership queries"):
  with members:
    - "linear time constructions of some d restriction problems"
    - "efficient computation of representative sets with applications in parameterized and exact algorithms"

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.DM(Discrete Mathematics)