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26 Nov 2008: Provethat A contains an infinite set B such that no point of B is a convex combination of otherpoints of B. ... 6. Show that every graph G has a partition of its vertex-set as X Y such that the numberof edges from X to Y is at least 12 e(G).

6 Mar 2008: vertices into sets B andR such that the only edges lie between vertices in different sets.(i) Show that if any finite subgraph of a graph is bipartite, then so is ... Suppose that any such formula is equivalent modulo T to aquantifier-free formula.

27 Feb 2008: extensions. We show that the Cartan map from K-theory to G-theory of such. ... Regarding the assumption on B, we ask the following. Question. Let H be a finite dimensional Hopf algebra such that the Cartan mapc : K0(H) G0(H) is injective and let

4 Feb 2008: Let P be the set of all p Q such that 2 < p2 < 3. ... c) If A and B are closed subsets of R such that 1 A, 1 B and [1, 1] A B, thenA B 6=.

12 Aug 2008: 5. Show that if x 6= y are vectors in the finite dimensional vector space V , then there is a linear functionalθ V such that θ(x) 6= θ(y). ... fn for V such that when x =. m1xiei and y =. n1yjfj we. have ψ(x, y) =r. 1xkyk, where r is the rank of ψ.

19 Mar 2008: 2 ANALYSIS II EXAMPLES 3. 7. (i) Suppose that f : R2 R is such that D1f = f /x is continuous in a neighbourhood of(a, b), and D2f = f /y exists ... Show that f is differentiable at (a, b). (ii) Suppose that f : R2 R is such that D1f = f /x exists and is

28 Feb 2008: In this and the following questions, youare not being asked to find such an isomorphism explicitly.)Decompose V 23 , Λ. ... b) Explicitly construct such a representation ρ : SU (2) SO(3) by showing that SU (2)acts on the vector space of matrices of the

10 Mar 2008: Show that for any b C, there exists a sequence of points zn D(a,R) with zn 6= a such thatzn a and f(zn) b as n. ... Find such a sequence when f(z) = e1/z, a = 0 and b = 2.

19 Mar 2008: iii) Give an example of disjoint closed sets A and B in R2 with points an A and bn B such. ... 9. [Tripos IB 96401(b), modified] (i) Suppose that (X, d) is a nonempty complete metric space, andf : X X a continuous map such that, for any x, y X, the

17 Oct 2008: 11 fn 6 0. Is it possible to find such a sequence with |fn(x)| 1 for all n and for all x? ... On the other hand, show that if fn does notconverge uniformly to f then we can find a convergent sequence xm x in [a, b] such that fn(xn) 6 f