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14 Jul 2024: There may besome such general argument—and my conjecture that CO theories in general. ... How do we get such a bijection? What is wrong with the following?

5 Feb 2017: Show that there exist unique complexnumbers A, B such that for every z C, T(z) = Az Bz̄. ... Can such a map everbe a Möbius transformation? 9. Let f : U C be a holomorphic function where U is an open set (you may assume f isalso C1).

9 Feb 2015: 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.

13 Nov 2002: else prove that no such relation exists. 1. 11. Define a binary operation on Z2 by the formula (a,b) (c,d) = (ac,ad bc). ... a1,b1) (a2,b2). (ak,bk). 12. Let A1,A2,. be sets such that for every positive integer n we have A1.

7 May 2008: terms each ofwhich of course must themselves evaluate to something low and each such termis of the form B(w1) B(w2). ... Here“B(x)” means the set (in the sense of 〈V,〉) of those y such that x co y).

15 Oct 2021: Define τ by:. U τ for all x U, there exists B β such that x B and B U. ... b) Fix a local base β̇. Show that a sequence (xn)n=1 is τ-Cauchy if and only if for anyB β̇ we can find an integer N such that.

4 Feb 2018: Show that for any b C, there exists a sequence of points zn D(a,R)with zn 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.[A much harder theorem of Picard says that in any neighbourhood of an essential

19 Jan 2021: Show that E has a subgroup isomorphic toE/M, and show that all such subgroups are conjugate. ... such that iApA iBpB = idM , pAiA = idA, pBiB = idB, pAiB = 0 andpBiA = 0.

29 May 2023: you definedisjoint union operationally by describing what it does, by giving a spec; youimplement it in such a way that it fits the spec). ... And we have to cook up such a function using only f, a and b.

25 Oct 2023: Then there is a point y / E such. that B(y,r) E 6= whenever r > 0. ... Since Uj1 isopen we can find a δj1 > 0 with δj1 δj/4 such that B(xj1,δj1) Uj1.

24 Nov 2023: 45) Show that there is a w such that Ww = {w} and a w such that |Ww| = |w|. ... Show that the following sets arecomputably enumerable:. (a) {w ; there are three distinct words v such that f(w, v)};(b) {w ; there is a word v of even length such

5 Jun 2020: 15, 18]. This means that there is a σ-finite measure ψ on(X,B) such that, for any A B with ψ(A) > 0, and any x X,. ... There is a function V : X [1,], a small set C X,and constants δ > 0, b < , such that:.

7 May 2013: Remark 2.2. — There exist coefficient systems B M such that. ... Let β H(M; (m )B) be a class such that (m )(β) = 0 H(M; B).

29 Jan 2024: 8. Let t1, t2,. be propositions such that, for every valuation v, there exists n N withv(tn) = 1. ... Show that there is a proposition b, inwhich the only primitive propositions appearing are those that appear in both a and c,such that a b and b c.

7 Dec 2022: 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

15 Oct 2009: Then there is N1 such that whenever n m N1 we have n. ... k=1 uk(x0). Also there is N2 such thatwhenever n m N2 we have n.

6 Aug 2021: b) Find a sequence fi R([a,b]) such that (fi)iN is Cauchy with respect tothe L2 norm, but for which there is no f R([a,b]) such that ... Proof. Since is open, there exists ,x such that the ball B(x) = {y Rn : |y x| < }is contained in.

12 Apr 2005: The pair is -regular if |d(A′,B′) d(A,B)| 6 for all subsets A′ Aand B′ B such that |A′|> |A| and |B′|> |B|. ... Proof. Define B [N]2 to be the set of all (x,y) such that x2y A.

12 Nov 2005: Let a be an integer with 1 a < p, and let σ Aut(L) be theunique automorphism such that σ(X) = aX. ... Use (ii) to show that there exists b K such that det(σiσj g1(b)) 6= 0.Deduce that if y = g1(b) then {σ(y) | σ G} is a

4 Feb 2023: a) Construct a continuous surjection p : T2 T2 from the torus to itself such that for every x T2, p1(x)consists of exactly two points, and such that p is ... Such a map is calleda covering map.]. (b) Show that T2 also admits a covering map p̂ : T2 K to