- #1
Tokipin
- 19
- 0
Homework Statement
From Introduction to Topology by Bert Mendelson, Chapter 2.7, Exercise 8:
Consider the subspace (Q, d_Q) (the rational numbers) of (R, d). Let a1, a2, ... be a sequence of rational numbers such that [itex]\lim_{n} a_n = \sqrt{2}[/itex]. Does the sequence converge when considered to be a sequence of points of (Q, d_Q)?
2. The attempt at a solution
I think the answer is that it doesn't converge in Q because the value is outside the space and the distance function can't tell how far away the point is. At the same time though, the sequence would seem to converge, though maybe to no particular value. Confusing. @_@