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• Projections, Birkhoff Orthogonality and Angles in Normed Spaces

  Zhizhi Chen, Wei Lin, Lü-Lin Luo

  2021-05-24

  38027 2627 Pages:378-384

• A KAM-Type Theorem for Generalized Hamiltonian Systems

  Baifeng Liu, Wenzhuang Zhu, Leshun Xu

  2021-05-20

  31104 2915 Pages:37-52