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: "on the graver basis of block structured integer programming"
  Abstract: We consider the 4-block $n$-fold integer programming (IP), in which the constraint matrix consists of $n$ copies of small matrices $A$, $B$, $D$ and one copy of $C$ in a specific block structure. We prove that, the $\ell_{\infty}$-norm of the Graver basis elements of 4-block $n$-fold IP is upper bounded by $O_{FPT}(n^{s_c})$ where $s_c$ is the number of rows of matrix $C$ and $O_{FPT}$ hides a multiplicative factor that is only dependent on the parameters of the small matrices $A,B,C,D$ (i.e., the number of rows and columns, and the largest absolute value among the entries). This improves upon the existing upper bound of $O_{FPT}(n^{2^{s_c}})$. We provide a matching lower bounded of $\Omega(n^{s_c})$, which even holds for an arbitrary non-zero integral element in the kernel space. We then consider a special case of 4-block $n$-fold in which $C$ is a zero matrix (called 3-block $n$-fold IP). We show that, surprisingly, 3-block $n$-fold IP admits a Hilbert basis whose $\ell_{\infty}$-norm is bounded by $O_{FPT}(1)$, despite the fact that the $\ell_{\infty}$-norm of its Graver basis elements is still $\Omega(n)$. Finally, we provide upper bounds on the $\ell_{\infty}$-norm of Graver basis elements for 3-block $n$-fold IP. Based on these upper bounds, we establish algorithms for 3-block $n$-fold IP and provide improved algorithms for 4-block $n$-fold IP.

Connected through hyperedge HE-1 (induced by source paper "multitype integer monoid optimization and applications"):
  with members:
    - "a parameterized strongly polynomial algorithm for block structured integer programs"
    - "faster algorithms for integer programs with block structure"
    - "empowering the configuration ip new ptas results for scheduling with setups times"
    - "near linear time algorithm for n fold ilps via color coding"
    - "on integer programming and convolution"
    - "scheduling meets n fold integer programming"
    - "proximity results and faster algorithms for integer programming using the steinitz lemma"
    - "about the structure of the integer cone and its application to bin packing"

Connected through hyperedge HE-2 (induced by source paper "about the complexity of two stage stochastic ips"):
  with members:
    - "a parameterized strongly polynomial algorithm for block structured integer programs"
    - "faster algorithms for integer programs with block structure"
    - "empowering the configuration ip new ptas results for scheduling with setups times"
    - "new bounds on augmenting steps of block structured integer programs"
    - "near linear time algorithm for n fold ilps via color coding"
    - "tight complexity lower bounds for integer linear programming with few constraints"
    - "scheduling meets n fold integer programming"
    - "combinatorial n fold integer programming and applications"

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.DS(Data Structures and Algorithms)