From this journal last Christmas—

Sunday, December 25, 2011

Frage

— m759 @ 3:59 PM 

"Woher dieser Sprung von Endlichen zum Unendlichen? "

— Wittgenstein, Zettel , § 273

Antwort— Accomplished in Steps and For 34th Street.

See also Boundary Method.

The "Boundary Method" link above leads to a Christmas Day obituary
for Maurice Jaswon, co-author of a book on color symmetry.

Those who prefer entertainment may consult the previous Christmas.