Misc: As what is the exclamation point known to mathematicians?

Questions

In 1882 Igor---------- , composer (Firebird Suite, The Rite of Spring)?

In 1885 Statue of Liberty arrived in NYC aboard the French ship `---------- '.?

In 1917 Dean---------- , singer, actor born?

In 1946 Barry---------- , singer, jingle writer (Like a Good Neighbor...)?

In 1940 ---------- asks Germany for terms of surrender in WW II.?