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Holly Krieger — Cambridge
https://www.dpmms.cam.ac.uk/~hk439/research.html9 May 2023: Juul, N. Looper, M. Manes, B. Thompson, L. Walton), Research Directions in Number Theory, Association for Women in Mathematics Series, Vol. ... Some consequences of Schanuel's conjecture (with C. Cheng, B. Dietel, M. -
The Cauchy-Schwarz inequality
https://www.dpmms.cam.ac.uk/~wtg10/csineq.html4 Oct 2001: 1. /b. 1. rather than some other a. i. /b. i. , ... i. are equal. This still leaves a minor problem that some of the b. -
Recent papers and preprints
https://www.dpmms.cam.ac.uk/~ik355/pubs.html17 May 2024: pdf]. I. Kontoyiannis. "Some information-theoretic computations related to the distribution of prime numbers." In Festschrift in Honor of Jorma Rissanen, (P. ... Mutual information, synergy, and some curious phenomena for simple channels." 2005 IEEE -
Lent 2024 LOGIC AND SET THEORY – EXAMPLES 4 ...
https://www.dpmms.cam.ac.uk/study/II/Logic/2023-2024/sheet4.pdf3 Apr 2024: Show further that if f : X Y is a continuous function between Polish spacesand f is injective on a Borel set B X, then f(B) is Borel. ... 14. Prove that a set A (in some Polish space) is analytic if and only if there exist closedsets An1,.,nk (indexed by -
Henkin on ω-consistency and ω-completeness JSL 1954 and 1957: ...
https://www.dpmms.cam.ac.uk/~tef10/henkin.pdf8 Jan 2021: After allT might prove φ(a) for every a in Γ and yet prove φ(b) for some constant bnot in Γ. ... We need some definitions. DEFINITION 4. A theory T is Γn-complete iff whenever φ(x1,. -
slide 0 Modular formsand motivesA J Scholl slide 1 ...
https://www.dpmms.cam.ac.uk/~ajs1005/preprints/banff.pdf29 Jan 2010: slide 12. Lemma j = isomn on HM(;)(") Z[ 12k!].(each component of complement is xedby some with "( ) = 1.)[D]ix(pr0#D [ [prk#D)(") 7!y2 2Hk1M (Uky ;k 1)(")'Hk1M ... E fyg)k;k 1)(")Eisenstein symbol (B)ny = 0, some n > 1[n]y 2 Hk1M ((E 0)k;k 1)(")?yoHk1M -
Publications | Department of Pure Mathematics and Mathematical…
https://www.dpmms.cam.ac.uk/publications?page=125%2C17 Jul 2024: doi: 10.1086/505480). Filtering: The Case for “Noisier” Data. B Lucena, I Kontoyiannis. – ... ISIT 2005. (2005). 2005,. 1833. (doi: 10.1109/ISIT.2005.1523662). Mutual Information, Synergy and Some Curious Phenomena for Simple Channels. -
DIFFERENTIAL GEOMETRY (PART III) MICHAELMAS 2021 EXAMPLE SHEET 2 ...
https://www.dpmms.cam.ac.uk/files/study/III/DifferentialGeometry/2021-2022/DGSheet2.pdf1 Nov 2021: Show that M M is trivial.(b) Show that for all n we have TSn R = Rn1 over Sn. ... 4.† Let α be a nowhere-zero 1-form on a manifold X, and let β be a p-form.(a) Show that if β = α γ for some (p -
Oscar Randal-Williams DPMMSCentre for Mathematical…
https://www.dpmms.cam.ac.uk/~or257/CV.pdf15 May 2024: O. Randal-Williams, Some phenomena in tautological rings of manifolds.Selecta Mathematica 24 (4) (2018) 3835-3873. ... Abelianisations of the mapping class groups of some highly-connected manifolds – Rice,Houston, 17th February 2014. -
Percolation Abstracts
https://www.dpmms.cam.ac.uk/~rb812/abstracts.pdf23 Jul 2023: In this talk, we will discuss some prospecting on how to userotation invariance to obtain new information on the critical random cluster models on Z2. ... Howdoes the answer depend on A,B,C? What if there are more than two species, with some -
The Pleasures of Counting
https://www.dpmms.cam.ac.uk/~twk10/my-book.html17 Aug 1998: 10. Some classic algorithms 11. Some modern algorithms 12. Deeper matters. ... Sources, Appendix C. Some notations. 540 pp., 67 line diagrams, 170 exercises. -
Families Intersecting on an Interval
https://www.dpmms.cam.ac.uk/~par31/preprints/intersections-abs.html23 Mar 2007: Fix some subset B of [n]. How large a family A of subsets of [n] can we find such that the intersection of any two sets in A contains a cyclic ... Chung, Graham, Frankl and Shearer have proved that, in the case where B is a block of length t, we can do -
The existence of root two
https://www.dpmms.cam.ac.uk/~wtg10/roottwo.html20 Sep 2001: We know that some numbers are irrational, but we can still describe them, by means of their decimal expansions. ... 2. in some way, consistent with the principle that 0 < a < b implies that a. -
Mich. 2023 ANALYSIS AND TOPOLOGY—EXAMPLES 4 PAR 1. Let ...
https://www.dpmms.cam.ac.uk/study/IB/AnalysisandTopology/2023-2024/4.pdf24 Nov 2023: 10. Let f: R2 R and (a,b) R2. (a) Suppose that D1f exists and is continuous in some open ball around (a,b), and that. ... b) Suppose instead that D1f exists and is bounded on some open ball around (a,b), and. -
Holly Krieger - vita
https://www.dpmms.cam.ac.uk/~hk439/CV.pdf19 Apr 2023: Juul, N. Looper, M. Manes, B. Thompson, L. WaltonTo appear in Research Directions in Number Theory - Women in Numbers 4. ... 23, 5498-5525. 2. 2009 Some Consequences of Schanuel’s Conjecture,with C. Cheng, B. -
problemsPDE
https://www.dpmms.cam.ac.uk/files/study/III/AnalysisPDE/2021-2022/Sheet1.pdf14 Oct 2021: Show that ifeb|k|f̂(k) L2(R) for some b > 0 then f is real analytic at each point in R. ... u1. 1We write A B to mean that there exists a universal constant C such that A CB. -
Erdös-Rado without choice Thomas ForsterCentre for Mathematical…
https://www.dpmms.cam.ac.uk/~tef10/erdosrado.pdf11 Mar 2007: ordering <a—which is initialised to <K. We use a to discard some orderedpairs. ... abbreviate to <<a. We will weed out some ordered pairs from <<a to obtain<a. -
ON MODULAR UNITS A. J. Scholl Introduction. In [6], ...
https://www.dpmms.cam.ac.uk/~ajs1005/preprints/u.pdf29 Jan 2010: It isthen clear that for some non-zero invariant v Vq the mapping Φq,1 is given by. ... may be represented by some k GẐ, and then. σ : ZQDf Nf k 7 ZQDẐNf k. -
Definitions
https://www.dpmms.cam.ac.uk/~wtg10/definition.html24 Nov 2001: In the end, in order to do this one is forced to come up with some non-canonical construction that satisfies the axiom. ... four times, being periodic with period some number (defined to be 2 pi), satisfying the addition law -
Lent 2024 Number Fields – Example Sheet 3 P.P. ...
https://www.dpmms.cam.ac.uk/study/II/NumberFields/2023-2024/example3.pdf23 Feb 2024: 2(1. 71). Find an element of OK with norm 2a 3b 5 for some. ... a,b 0. Hence prove that the class group of K is cyclic and find its order. -
Geometric group theoryExample sheet 1 Lent 2023 Questions marked ...
https://www.dpmms.cam.ac.uk/files/study/III/GeometricGroupTheory/2022-2023/2023%20GGT%20Sheet%201.pdf16 Feb 2023: 5. Consider the (2,3)-Baumslag–Solitar group BS(2, 3) = 〈a,b | ba2b1a3〉. ... You may use the simplicial approximation theoremwithout proof.]. (b) By considering the preimage of the midpoint of I in the disc, provethat some term ai or bi of g is -
Fermat's little theorem
https://www.dpmms.cam.ac.uk/~wtg10/fermat.html6 Mar 2002: b in B (that is, some non-zero b (mod p)) such that the set of all bx. ... Hence, if we can find some b that does not belong to A, then we have constructed the desired injection. -
MATHEMATICAL TRIPOS: PART IA Lent 2024 PROBABILITY JRNExample Sheet…
https://www.dpmms.cam.ac.uk/study/IA/Probability/2023-2024/pex1.pdf11 Jan 2024: 6. Let (An : n N) be a sequence of events in some probability space (, F, P). ... Set. A = {ω : ω An infinitely often}, B = {ω : ω An for all sufficiently large n}. -
Extensions of motives and higher Chow groups A. J. ...
https://www.dpmms.cam.ac.uk/~ajs1005/preprints/chow.pdf29 Jan 2010: The second is to. construct some extensions of motives related to elements of higher Chow groups and to. ... as in 1 is probably known to some experts (see for example the penultimate paragraph of. -
Cahiers du Centre de logiqueVolume 17 The Paris-Harrington Theoremin…
https://www.dpmms.cam.ac.uk/~tef10/parisharringtontalk.pdf5 Nov 2009: b) to illustrate some of the ways in which P-H is stronger than FiniteRamsey (tho’ the proof of independence from PA is not covered);. ... So, for some large j, consider the initialsegment consisting of the first j elements of X. -
The fundamental theorem of arithmetic
https://www.dpmms.cam.ac.uk/~wtg10/FTA.html15 Jun 2000: The definition is that it is not divisible by 2. However, another, more positive definition is that a can be written 2b1 for some integer b. ... b. Having had some success with addition, we could try multiplication. What happens if we replace a by ha? -
Riemann SurfacesExample Sheet 1 Michaelmas 2023 Please send any ...
https://www.dpmms.cam.ac.uk/study/II/Riemann/2023-2024/RS1M23.pdf12 Oct 2023: 6. By considering the singularity at or otherwise, show that any injective holo-morphic map f C C has the form f(z) = az b, for some a C and b ... 0,1,a} to be conformallyequivalent to C{0,1,b}, where a,b C{0,1}.[Don’t forget the cross ratio from IB - -
ON SOME `-ADIC REPRESENTATIONS OF Gal(Q/Q)ATTACHED TO NONCONGRUENCE…
https://www.dpmms.cam.ac.uk/~ajs1005/preprints/galois-pre.pdf13 Oct 2006: ON SOME -ADIC REPRESENTATIONS OF Gal(Q/Q)ATTACHED TO NONCONGRUENCE SUBGROUPS. A. J. ... Therefore for some a, b Z, azHT b is asemisimple element of g with exactly 2 eigenvalues. -
Mich. 2023 ANALYSIS AND TOPOLOGY—EXAMPLES 1 PAR 1. Let ...
https://www.dpmms.cam.ac.uk/study/IB/AnalysisandTopology/2023-2024/1.pdf12 Oct 2023: a, b], and suppose that fn converges pointwise to a continuous function f. ... Show that there is some subinterval [a, b] of [0, 1] with a < b on which (fn) is uniformly. -
The mean value theorem
https://www.dpmms.cam.ac.uk/~wtg10/meanvalue.html13 Dec 2001: Then there is some point c in (a,b) such that f'(c) equals (f(b)-f(a))/(b-a). ... Here, I take f to be real valued and defined on some interval of real numbers. -
Relaxing stratification Thomas ForsterDPMMS, CMS Wilberforce…
https://www.dpmms.cam.ac.uk/~tef10/relaxing.pdf29 Mar 2011: In some cases we have felt obliged to supply more than one proof toallay suspicions. ... The next formula needs some explanation! Like (7) it is a stratified formula,with ‘u’ free, and it says that there are two external isomorphisms between〈A,A〉 -
STATISTICS Part IBExample Sheet 1 (of 3) Lent 2022 ...
https://www.dpmms.cam.ac.uk/study/IB/Statistics/2021-2022/Qu1.pdf13 Jan 2022: b) For some n 2, let X1,. ,Xniid Exp(θ). Find a minimal sufficient statistic T , and compute. ... 4. For some n 2 let X1,. ,Xniid Unif(θ, 2θ) for some θ > 0. -
Solving cubic equations
https://www.dpmms.cam.ac.uk/~wtg10/cubic.html25 Apr 2002: Then, with some embarrassment, we note to ourselves that we can solve the equation when a = 0. ... 1. Is there a similar way to simplify a cubic so that some of the coefficients become zero? -
One-step refutations using bombs
https://www.dpmms.cam.ac.uk/~tef10/cam_only/langs-and-automata/1-4-1.html13 Aug 2009: some as followed by some bs and then some as again (and then some bs). ... We will show that will accept some strings that aren't palindromes, and therefore doesn't recognise {a. -
Michaelmas Term 2023 T.A. Fisher Galois Theory: Example Sheet ...
https://www.dpmms.cam.ac.uk/study/II/Galois/2023-2024/galois_theory-23-4.pdf24 Nov 2023: 4. Let K be a field containing a primitive mth root of unity for some m > 1. ... Showthat f and g have the same splitting field if and only if b = cmar for some c Kand r N with gcd(r,m) = 1. -
Abstract set theory
https://www.dpmms.cam.ac.uk/~wtg10/settheory.html9 Jun 2003: b. 3. for some pair of positive integers a,b}. (vi) X. ... n. , but for a general proof, we must specify some method that always works. -
Lent Term 2024 O. Randal-Williams IB Groups, Rings, and ...
https://www.dpmms.cam.ac.uk/study/IB/GroupsRings%2BModules/2023-2024/Sheet3.pdf15 Jan 2024: Could there be some other Euclidean function φ making Z[3] into a Euclidean domain? ... iii) Show that if R is a PID, the gcd of elements a and b exists and can be written as rasbfor some r,s R. -
Why do we need the real numbers?
https://www.dpmms.cam.ac.uk/~wtg10/reals.html3 Sep 2003: What does that mean? Well, if f(x)=u and f(y)=v and z=axby for some a,b> 0 with ab=1 then f(z) ought to be close ... there must be some c between a and b such that f(c)=w. -
SS (ss2871@maths.cam.ac.uk) Michaelmas 2023 Probability and Measure 1 …
https://www.dpmms.cam.ac.uk/study/II/Probability%2BMeasure/2023-2024/ex1.pdf11 Oct 2023: algebra. 1.2. Show that the following sets of subsets of R all generate the same σ-algebra:(a) {(a,b) : a < b}, (b) {(a,b] : a < b}, (c) {(,b] : b ... 1. 2. 1.9. Let (E,E,µ) be a measure space. Call a subset N E null if N B for some B E withµ(B) = 0. -
ANALYSIS OF FUNCTIONS EXAMPLE SHEET 4Richard Nickl 〈rn289@cam.ac.uk〉…
https://www.dpmms.cam.ac.uk/study/II/AnalysisofFunctions/2023-2024/example4-RN.pdf7 Mar 2024: space. What if 𝑠 1/2? Exercise 6. a) Suppose 𝑠 = 𝑛2 𝛾 for some 0 < 𝛾 < 1. ... ANALYSIS OF FUNCTIONS EXAMPLE SHEET 4. b) Show that if 𝑠 = 𝑛2 𝑘 𝛾 for some 𝑘 Z>0, 0 < 𝛾 < 1, then. -
Ordinals and Ordinal Hierarchies
https://www.dpmms.cam.ac.uk/~wtg10/ordinals.html10 Sep 2002: It has complexity w. 2. if after the first move the game has complexity awb for some a,b. ... x. for some x in X, and the map x goes to t. -
Mich. 2007 ANALYSIS II—EXAMPLES 4 PAR 1. At which ...
https://www.dpmms.cam.ac.uk/study/IB/AnalysisII/2007-2008/sheet4.pdf21 Nov 2007: a) Suppose that D1f exists and is continuous in some open ball around (a, b), and that D2f exists at (a, b). ... Show that f is differentiable at (a, b). (b) Suppose instead that D1f exists and is bounded on some open ball around (a, b), and that for -
Mich. 2023 ANALYSIS AND TOPOLOGY—EXAMPLES 4 PAR 1. Let ...
https://www.dpmms.cam.ac.uk/~par31/at/4.pdf21 Nov 2023: 10. Let f: R2 R and (a,b) R2. (a) Suppose that D1f exists and is continuous in some open ball around (a,b), and that. ... b) Suppose instead that D1f exists and is bounded on some open ball around (a,b), and. -
Arden's rule and some stuff like that
https://www.dpmms.cam.ac.uk/~tef10/cam_only/langs-and-automata/2-3.html13 Aug 2009: 2.3 Arden's rule and some stuff like that. B I G H O L E H E R E. -
Lent 2024 Number Fields – Example Sheet 3 P.P. ...
https://www.dpmms.cam.ac.uk/~pv270/example3.pdf8 Mar 2024: 2(1. 71). Find an element of OK with norm 2a 3b 5 for some. ... a,b 0. Hence prove that the class group of K is cyclic and find its order. -
NUMBER FIELDS, LENT 2024 PÉTER P. VARJÚ Disclaimer,…
https://www.dpmms.cam.ac.uk/~pv270/NumberFields.pdf8 Mar 2024: a1α1. adαdq. for some a1,. ,ad Z. Proof. We take. q =(disc(α1,. , ... In what follows, we will exhibit asuitable α, but this requires some preparations. -
Mirror symmetry and the SYZ conjecture
https://www.dpmms.cam.ac.uk/~mg475/current.pdf16 Jul 2014: that the transition functions ψi ψ1j are in factaffine linear transformations v 7 Tv v0 for some T GL(Λ) andv0 V. ... This conjecture remains unproven other than some verystraightforward cases (abelian varieties, K3 surfaces).However, it has led to a -
The Thought-experiment
https://www.dpmms.cam.ac.uk/~tef10/cam_only/langs-and-automata/1-2.html13 Aug 2009: Let us try some examples. Let L be the set of strings over the alphabet {a, b} which have the same number of as as bs. ... a. n. b. n. : n } This is the language of strings consisting of any number of as followed by the same number of bs. -
Mich. 2008 ANALYSIS II—EXAMPLES 4 PAR 1. Show that ...
https://www.dpmms.cam.ac.uk/study/IB/AnalysisII/2008-2009/08sheet4.pdf30 Nov 2008: Find the Taylor series of g(I H) about I. 9. Let f : R2 R and (a, b) R2.(a) Suppose that D1f exists and is continuous in some open ball ... around (a, b), and that D2f exists at (a, b).Show that f is differentiable at (a, b).(b) Suppose instead that D1f -
Tensor products
https://www.dpmms.cam.ac.uk/~wtg10/tensors3.html14 May 2003: Just so that we don't have to keep writing the phrase considered as a function on B', let us invent some notation. ... i. ,w. i. ), for some unknown bilinear function f, determined the value of f(v,w).
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