# Outer Space. And real aliens.

##### 2006-10-10 22:47:07 +0000 mathematics

There are some questions about outer space that I would like to be able to answer. Some nice survey articles look to be:

MR1957048

and also:

MR1950871

Here is a ridiculously simple question I have wondered about: given $A, B \subset F_n$, say with $[F_n : A] = [F_n : B]$, how can I tell if $A$ and $B$ are conjugate? I suspect I’m being stupid here.

In light of my recent comments on LINCOS and communiating with extraterristrials, I found an article:

MR1754781

Putnam also makes use of the idea of mathematicians from other planets, to more philosophical ends.