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: "bright field aapsm conflict detection and correction"
  Abstract: As feature sizes shrink, it will be necessary to use AAPSM (Alternating-Aperture Phase Shift Masking) to image critical features, especially on the polysilicon layer. This imposes additional constraints on the layouts beyond traditional design rules. Of particular note is the requirement that all critical features be flanked by opposite-phase shifters, while the shifters obey minimum width and spacing requirements. A layout is called phase-assignable if it satisfies this requirement. If a layout is not phase-assignable, the phase conflicts have to removed to enable the use of AAPSM for the layout. Previous work has sought to detect a suitable set of phase Conflicts to be removed, as well as correct them. The contribution of this paper are the following: (1) a new approach to detect a minimal set of phase conflicts (also referred to as AAPSM conflicts), which when corrected will produce a phase-assignable layout; (2) a novel layout modification scheme for correcting these AAPSM conflicts. The proposed approach for conflict detection shows significant improvements in the quality of results and runtime for real industrial circuits, when compared to previous methods. To the best of our knowledge, this is the first time layout modification results are presented for bright-field AAPSM. Our experiments show that the percentage area increase for making a layout phase-assignable ranges from 0.7-11.8%.

Connected through hyperedge HE-1 (induced by source paper "layout decomposition for double patterning lithography"):
  with members:
    - "approximate graph coloring by semidefinite programming"

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.AR(Hardware Architecture)