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15 Oct 2021: Let a, b K such that thepolynomials f = xm a, g = xm b are irreducible. ... Show that G is solvable if and only if there is an i such that.

14 Oct 2021: y2= 0 (3). Construct a sequence of real analytic functions (uk)k=1 with uk : R2 R solving (4) such. ... u1. 1We write A B to mean that there exists a universal constant C such that A CB.

13 Oct 2021: foreach γ C there exist elements α(γ) A and β(γ) B, such that for all γ we have:. ... multiplication. An R-linear derivation OX,p R is an R-linearmap d : OX,p R such that d(fg) = d(f)g(p) f(p)d(g) for all f

22 Nov 2021: S aSbb | T, T bTaa | S | ǫ. (3) Give a CFG for each of the following CFL’s, and then transform each such CFG intoCNF (giving a justification for the transformation). ... b) Show that the language L := {anbncn | n 1} is not a CFL.

29 Nov 2021: Before we begin, let us define the notion of base. A base for a topology on a setX is a family B of open subsets of X such that every open ... such that x B U.Examples The family of open balls in a metric space is a base for the metrictopology.

14 Oct 2021: Show thatS1M = 0 if and only if there exists an s S such that sM = 0. ... ii) There exists nonzero elements e1,e2 A such that e1e2 = 0, e21 = e1, e22 = e2 and e1 e2 = 1.iii) A is isomorphic to A1 A2 for some rings

28 Oct 2021: A = {x M : (xn) in A such that xn x} and A = {x M : r > 0 Dr(x) A}. ... Some more questions. 13. (a) A topological space is said to be second countable if there is a countable family Bof open sets such that every open set is a union

15 Oct 2021: Incomponents we write B. j,γ,δ= ((bklj,γ,δ)) and c. γ,δ = (c. ... j, c such that the corresponding. series for u converges near x = 0.

27 Oct 2021: if any), and why? (b) By replacing A in the construction of B with a suitably chosen set, construct a setC N such that neither C nor N C are ... and such that Wn is recursive foreach n I but. nI Wn is not r.e.

4 Mar 2021: AC B,ρA ρB) D.5 For an inverse system (Ai,ρi) D such that limAi CO then. ... Example (Determinant). Fix a continuous character ψ : Γ O such that ψ mod λ det ρ̄.