On (stable) cohomotopy in low codimension:
Pengcheng Li, Jianzhong Pan, Jie Wu: Stable Cohomotopy in Codimensions Two and Three: From Algebraic Characterizations to Bordism-Theoretic Interpretations [arXiv:2605.13239]
Pengcheng Li, Zhongjian Zhu: The homotopy decomposition of the suspension of a non-simply-connected 5-manifold, Proceedings of the Royal Society of Edinburgh Section A: Mathematics 156 1 (2026) 93–121 [doi:10.1017/prm.2024.49, arXiv:2311.16642]
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