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19 Dec 2014: Let a = min{| A |: A is an infinite maximalalmost disjoint family of subsets of ω}, b = min{| B |: B is unbounded in (ωω,)},and d = min{| D |: D is dominating in ( ... i) Prove that 1 min{a, b, d} max{a, b, d} 20.

18 Jan 2005: Lïiì Õ Þòð;ñ;à Õ Ð5 Ðîbª5àÏTÐbÑÑEÑEÐàÒ Â5ËE»b«»b¿ª¥bÔwb¿ ¥ÂµwEÁmY«=ª¥«'á;Sû!YE»lª=5bi=T¥«=µ¥ ðSÔw}Á'TþwEÁÁEíYE=¥i¥w bªEÁmª¥@¥Âµ(ðÔs«=ÓªEüÖwE¿ª@ªÁm¥w¥Âµ¥w¥«=

27 Oct 2016: Hint: Bolzano-Weierstrass.). 3. If A and B are subsets of Rn, let A B = {a b |a A,b B}. ... a) f(x) = sin x2 (b) f(x) = inf{|xn2| |n Z} (c) (sin x3)/(x 1).

29 Jan 2010: 1/2 it is the subspace spanned by the functionφ: bk 7 δ(b) (for b B, k K), and the linear form in (1.2) can be nor-malised so ... hence b = c since (,) is symmetric. Likewise b = a = c hence a = b =c = 0.

5 Apr 2007: If V is a normed vector space, then B is bounded iff B B(t) forsome t > 0, where B(t) denotes the open unit ball around the origin of radius ... Tα(B(ǫ)) Tαx0 B(n). Let n0 = supα |Tαx0|. We have then.

29 Jan 2024: b b. bb. b. b. b. b. b b. b. b. ... b b. b. b. 6. Let Γ and L, respectively, be the graph and the link pictured below.

29 May 2010: γ = γa,b,n : nCa,b nCa,b1. the alternating sum of the Gysin maps. ... Assume:. (a) RH(d 1) holds;(b) YK and ZK satisfy the weight-monodromy conjecture.

27 Oct 2006: 0|f| a normed space? 3. Which of the following subsets of R2 are (a) open, (b) closed? ... Show that there exist disjoint closed subsets A, B of R (or R2 if you prefer) withd(A, B) = 0.

21 Nov 2023: b) Define an equivalence relation on X Y by (x,y) (x′,y′) iff x = x′. ... D2f exists at (a,b). Show that f is differentiable at (a,b).

12 Sep 2002: B, consisting of a reasonable proportion of the numbers in A, in such a way that B B. ... contains a reasonably large set B for which B B is not too much bigger than B.