Celebratio Mathematica

incollection M. Freed­man: “Freed­man’s writ­ings on Lin,” pp. 430–​431 in To­po­logy and phys­ics (Tianjin, China, 27–31 Ju­ly 2007). Edi­ted by K. Lin, Z. Weng, and W. Zhang. Nankai Tracts in Math­em­at­ics 12. World Sci­entif­ic (Hack­en­sack, NJ), 2008. Sev­er­al let­ters writ­ten by Freed­man to Lin. MR 2489601

incollection M. Freed­man, C. Nayak, K. Walk­er, and Z. Wang: “On pic­ture \( (2+1) \)-TQFTs,” pp. 19–​106 in To­po­logy and phys­ics (Tianjin, China, 27–31 Ju­ly 2007). Edi­ted by K. Lin, Z. Weng, and W. Zhang. Nankai Tracts in Math­em­at­ics 12. World Sci­entif­ic (Hack­en­sack, NJ), 2008. MR 2503392 Zbl 1168.​81024 ArXiv 0806.​1926