>>304 つづき

[7]Kinoshita, Yoshiki (23 April 1996). "Prof. Nobuo Yoneda passed away". Retrieved 21 December 2013.
http://www.mta.ca/~cat-dist/catlist/1999/yoneda

Date: Tue, 23 Apr 1996 08:20:08 -0300 (ADT)
Subject: Prof. Nobuo Yoneda passed away

Date: Tue, 23 Apr 96 12:18:58 JST
From: KINOSHITA Yoshiki
抜粋
When he arrived in Princeton, Eilenberg had moved (sabbatical?) to
France (or maybe, Eilenberg left US just after Yoneda's arrival). So,
Yoneda went to France a year later. At that time, Saunders Mac Lane
was visiting category theorists, apparently to obtain information to
write his book (or former survey), and he met the young Yoneda, among
others. The interview started in a Caf\'{e} at Gare du Nord, and went
on and on, and was continued even in Yoneda's train until its
departure. The contents of this talk was later named by Mac Lane as
Yoneda lemma. So, the famous Yoneda lemma was born in Gare du Nord.
This must have been a good memory for Yoneda; I heard him tell this
story many times. I do not know whether Mac Lane managed to leave the
train before departure!