主要代表作：
1.Yuan Li, Xiu-Hong Sun, and Zheng-Li Chen,Generalized infimum and sequential product of quantum effects,J. Math. Phys,48, 102101 (2007).
2.李愿,杜鸿科,解析余亚正规算子的a-Weyl定理,数学学报,2007,50(4):751-758.
3.Li Yuan,Sun Xiu-Hong and Du Hong-Ke,The intersection of left (right) spectra of $2\times2$ upper triangular operator matrices,Linear Algebra and its Applications,2006,418:112-121.
4. Li Yuan and Du Hong-Ke,The intersection of essential approximate point spectra of operator matrices,J. Math. Anal. Appl.,2006, 323:1171-1183.
5. Li Yuan and Du Hong-Ke,A note on the infimum problem of Hilbert space effects,Journal of Mathematical Physics,2006,47(10):102103.
6.李愿,孙秀红,杜鸿科,$2\times 2$ 上三角矩阵左（右）Weyl谱的交,数学学报,2005,48(4):653-660.
7.Du Hong-Ke and Li Yuan,The spectral characterization of generalized projections,Linear Algebra and its Applications,2005,400:313-318.
8.Li Yuan,Sun Xiu-Hong and Du Hong-Ke,The intersection of left and right essential spectra of $2\times2$ upper triangular operator matrices,Bulletin of London Mathematics Society,2004,
36(5): 811-819.
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