PROOF OF CONCEPT
a 3×6 word rectangle
Noam D. Elkies, 2/2013
|| 1 Halmos ______ (2-Down symbol)
|| 2 “Prove it, dood!”
|| 3 NJ township named for an inventor
1 135° from WNW
2 “That proves it!”
3 Gun nearly as old as the country where it was invented
4 “Too cute for words!” reactions
5 Pi ___ (arsonists’ fraternity?)
6 10π petaseconds or so, to a geologist
Hungarian mathematician Halmos (1916–2006) is credited with introducing
the use of
2A – By crossword convention, the informal diction and spelling in
the clue signals the same features in the answer “Sez who?”.
3A – As the
Wikipedia page explains,
“The name was officially changed to Edison Township on
November 10, 1954, in honor of inventor Thomas Edison,
who had his main laboratory in the Menlo Park section of
1D – It would be poor form to use this clue for ENE,
which is geometrically valid but repeats the clue’s N=North.*
2D – QED is perhaps
surprisingly common in crosswords,
because the U that would normally follow Q can be hard to accommodate.
3D – Israel was founded in 1948; the
was first issued to Israeli soldiers in the mid-50’s.
4D – Well how else was I to clue
5D – As in “pyromaniac”
[“pyro” sounds like “π ρ”];
at least I didn’t go the boring
“Pi follower, to Protagoras” route.
6D – Besides the generic “ages and ages” sense,
the word “eon” (or æon, or aeon) also means specifically
“a billion years of geologic time”.
It is well-known that a year is about
π ·107 seconds long.
(*) Likewise for any of the eight possible “135° from” clues.
For a clue with two equally good answers, use 112.5° or 157.5° from
a cardinal direction N/E/S/W, or 157.5° from an intercardinal direction
like NE (no, I didn’t know before looking up Wikipedia’s entry
for “cardinal direction” that this is a standard term
— nor that there’s an equivalent term