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6 Mar 2014: Show that for any Hecke character χ, thereexist continuous χv : Kv C (v ΣK) such that. ... πv7. )= 1. Show that there is a unique Hecke character χ of K such that. •

28 Oct 2023: functionf : (X,w) [0, 1] such that f(p) = 1 and f = 0 on C. ... Showthat (K,M,µ1) is the completion of (K,B,µ). 19. Let X be a real or complex vector space with a topology such that addition, scalarmultiplication are continuous, and

15 Oct 2021: Exercise 3.1. a) Suppose that {j. }1j=1 E () is a sequence such that j! ... f 2 L1(Rn). Fix > 0. Show thatthere exists f. 2 C10(Rn) such that.

29 Sep 2023: The discriminant = (a, b)=16(4a327b2)is non-zero. Conversely, for any pair (a, b) O2K such that (a, b) , 0, the equation(2.1) defines an elliptic curve. ... ap bp = cp. to the Fermat equation in exponent p; thus a, b, c Z are coprime non-zero

29 Sep 2003: 1. 2 ANALYSIS II EXAMPLES 1. (ii) If fn does not converge uniformly, show that we can find a convergent sequence xn x in[a,b] such that fn(xn) does ... derivative’ limh0+ ((f(h) f(0))/h),and similarly for f′(1)), but such that f′ is unbounded on [0,

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

11 Nov 2016: Let x0 and 0 < ρ < ρ̄ be such that the ball B(x0, ρ̄). ... where b Rd and c R. Show that there exists a constant C such thatB(x0,ρ).

23 Nov 2021: 13. Let S be a collection of subsets of N such that for every A,B S we have A B or B A.Can S be uncountable? ... Is there an uncountable collection T of subsets of N such that A B isfinite for all distinct A,B T?

26 Oct 2015: fn for V such that. ψ.  mi=1. xiei,. nj=1. yjfj. ... Suppose thatα: V W is a linear map such that α(Y ) Z.

14 Mar 2005: Proof. Define B [N]2 to be the set of all (x,y) such that xy A. ... It follows that there are functions a, b and c. taking values in [0, 1] such that.

1 Oct 2012: Suppose W is a (n1)-connected 2n-manifold such that πn(W) πn(BO) is surjective. ... Theorems A and B follow fromtwo observations about the monoid E: firstly that the submonoid E′ consisting ofthose path components represented by manifolds W such that

4 Dec 2014: If A is the matrix of the first of these (say), find a non-singular matrix P such that PTAP is diagonalwith entries 1. ... 14. Let a1, a2,. , an be real numbers such that a1 an = 0 and a21 a2n = 1.

17 Nov 2013: Use (ii) to show that there exists b K such that det(σiσjg1(b)) 6= 0.Deduce that if y = g1(b) then {σ(y) | σ G} is a K-basis ... for L.Such a basis {σ(y)} is said to be a normal basis for L/K, and the result just proved is the NormalBasis Theorem.

5 Jun 2020: According to Occam’s razor, the simplest such explanation is theone that should be favored. ... h x (α) = min{. log2 |B|, for sets B such that x B and K (B) α}.

6 Oct 2019: map(B,M) = {families of (.) over B}. Then. H(M) = {characteristic classes of such families}. ... This “resolution” point of view applies to many further examples,such as Confn(Rk) or BDi (W).

15 Oct 2021: Questions marked () are optional. 2. b) For all x 2 A, for all i 2 N there exists > 0 such that:. ... R such that f(x) = ˜f(x) for all x 2 (a, b).

22 Nov 2022: Let a, b K such thatthe polynomials f = Xm a, g = Xm b are irreducible. ... Use a suitable Lagrange resolvent to finda Q(ζ3) such that K = Q(ζ3, 3.

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

10 Feb 2023: g :(D2,S1. ) (M,B). such that[g|S1. ]6 N. We first explain why the Loop Theorem implies Dehn’s Lemma:. ... g :(D2,S1. ) (M,B). such that[g|S1. ]6= 1. Set c =. [g|S1. ] π1B, and write c = ka b, with. k, Z.

13 May 2016: If φ : (Sn,) (B,B) , show that we can find a mapΦ : X E such that p Φ = φ π and Φ(Sn1 0) =. If we define φ =Φ|Sn11 : Sn1 ... Show that there are maps Ap : TpM TpM such that ifv,w TpM, ω(v,w) = 〈Apv,w〉.