Paul Erdös’ Holograph Postcard to Leopold Fejér. / Paul Erdős’ Holograph Postcard to Leopold Fejér.
Sent from Toronto. Dated on December 30, [1957]. Handwritten postcard by Erdős. Signed by Erdős and six fellow mathematicians. 140 × 85 mm. Two lines of handwritten greetings in Erdős’s hand, sent to his doctoral advisor Lipót Fejér (1880–1959). Beside Erdős the postcard is signed by fellow mathematicians..... More