Long, Yiming Criterion for \(\text{SL}(2,\mathbb{Z})\)-matrix to be conjugate to its inverse. (English) Zbl 1022.20021 Chin. Ann. Math., Ser. B 23, No. 4, 455-460 (2002). Reviewer: Li Fu-an (Beijing) MSC: 20H05 11F06 20E45 15A09 15A30 PDFBibTeX XMLCite \textit{Y. Long}, Chin. Ann. Math., Ser. B 23, No. 4, 455--460 (2002; Zbl 1022.20021) Full Text: DOI
Long, Yiming; Zhu, Chaofeng Maslov-type index theory for symplectic paths and spectral flow. II. (English) Zbl 0959.58017 Chin. Ann. Math., Ser. B 21, No. 1, 89-108 (2000). Reviewer: Peter Haskell (Blacksburg) MSC: 58E05 37J45 58J30 53D12 34C25 47A50 PDFBibTeX XMLCite \textit{Y. Long} and \textit{C. Zhu}, Chin. Ann. Math., Ser. B 21, No. 1, 89--108 (2000; Zbl 0959.58017) Full Text: DOI
Zhu, Chaofeng; Long, Yiming Maslov-type index theory for symplectic paths and spectral flow. I. (English) Zbl 0959.58016 Chin. Ann. Math., Ser. B 20, No. 4, 413-424 (1999). Reviewer: Peter Haskell (Blacksburg) MSC: 58E05 58J30 53D12 PDFBibTeX XMLCite \textit{C. Zhu} and \textit{Y. Long}, Chin. Ann. Math., Ser. B 20, No. 4, 413--424 (1999; Zbl 0959.58016) Full Text: DOI
Long, Yiming On the minimal period for the periodic solutions problem of nonlinear Hamiltonian systems. (English) Zbl 0890.58069 Chin. Ann. Math., Ser. B 18, No. 4, 481-484 (1997). MSC: 37G99 34C25 37J99 58E05 PDFBibTeX XMLCite \textit{Y. Long}, Chin. Ann. Math., Ser. B 18, No. 4, 481--484 (1997; Zbl 0890.58069)