Photographer unknown2018-09-252018-09-25undatedhttp://172.16.52.76:80/cdm/ref/collection/coll3/id/1006https://hdl.handle.net/20.500.12111/4768Informal photograph of ( l. to r.) Solomon Lefschetz, Heinz Hopf, and Armand Borel. Borel was on the Faculty of the Institute for Advanced Study.B&WPermission to use this image must be requested from the Institute's Archives. Please contact archives@ias.edu.Borel, ArmandHopf, Heinz, 1894-1971Lefschetz, Solomon, 1884-1972Institute for Advanced Study (Princeton, N.J.). School of MathematicsInstitute for Advanced Study (Princeton, N.J.)--FacultyImage