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21 Nov 2012: 12. Let S be a collection of subsets of N such that for every A, B S we have A B orB A. ... otherwords, for every a < b and every c there is an x with a < x < b such that f (x) = c.

29 Oct 2012: On the other hand, show that if fn does not. converge uniformly to f then we can find a convergent sequence xm x in [a, b] such that fn(xn) 6 ... valued functions (fn) on R such that fn converges pointwise to a function f which is continuous but not.

10 Oct 2012: show that for every β L we can find a, b, c, d K such that β = a bαc dα. ... 1.16. Let K, L be subfields of a field M such that M/K is finite.

21 Feb 2012: Show that for any b C, there exists a sequence of points zn Ba(R) withzn 6= a such that zn a and f (zn) b as n. ... Find such a sequence when f (z) = e1/z, a = 0 and b = 2.

8 Feb 2012: 14. Exhibit a subset X of R2 such that (a) any two points x, y X can be joined bya continuous path γ : [0, 1] X and (b) for x 6= ... A regular polyhedron is one in which all two-dimensional faces are congruent regularpolygons, and such that for each

12 Nov 2012: such that θ(x) 6= θ(y).(b) Suppose that V is finite dimensional. ... b) Suppose AB = BA. Show there exists an invertible matrix P such that P AP 1 and P BP 1 are both uppertriangular.

31 Jan 2012: ii) Find an example of a finite lattice L which admits at least one homomorphism L 2,but does not have enough such homomorphisms to separate its elements. ... The largest such c is usually denoted a b; this defines a binaryoperation on L, which is called

30 Oct 2012: ii) Find an example of a finite lattice L which admits at least one homomorphism L 2,but does not have enough such homomorphisms to separate its elements. ... b. (The largest such c is usually denoted a b; this defines a binaryoperation on L, which is

30 Oct 2012: 8. By a selection function for a set a, we mean a function s : Pa Pa such that s(b) bfor all b a, both inclusions being strict unless b is ... First show that there exists β < α such that|f (β) f (γ)| < 1 for all γ > β.].

23 Jun 2012: 2) Let (Rn,d) denote Euclidean n-space. If P,Q,R are points in Rn such that. ... For any sequence (gn) Y such that gn g X, show that g Y.