Celebratio Mathematica

incollection S.-S. Chern: “Geo­metry of char­ac­ter­ist­ic classes,” pp. 1–​40 in Pro­ceed­ings of the thir­teenth bi­en­ni­al sem­in­ar of the Ca­na­dian Math­em­at­ic­al Con­gress (Dal­housie Uni­versity, Hal­i­fax, NS, 16 Au­gust–3 Septem­ber 1971), vol. 1. Edi­ted by J. R. Van­stone. Ca­na­dian Math­em­at­ic­al Con­gress (Montreal), 1972. A Rus­si­an trans­la­tion was pub­lished in Us­pehi Mat. Nauk 28:3(171) (1973). MR 0370613 Zbl 0269.​57013