Matematik 3MI - Mål og integralteori


Regarding the exam in January 2004: The long list is the same as in June 2003. A preliminary version of The short list (5 problems) may be seen here. It will not change on and after December 15, 2003. OBS: It is not equal to the one from June.

 


(forår 2003)

Velkommen! - and Welcome foreign students!

Weekly assignments

Question Session = Spørgetime    The form of the Exam made precise (en præcissering af eksamensformen)    Information about the exam: FINAL Scores!!! (OBS: NEW! - posted on July 03) and Solutions to selected questions

The leading character in the course is Henri Léon Lebesgue (1875-1941). He introduced the Lebesgue integral in his dissertation from 1902, and it was a seminal work. It took some time before his ideas were accepted. A quote from the correspondence between Hermite and Stieltjes from around 1890 indicates a little the squabbles shortly before. Hermite writes: 'Je me detourne avec effroi et horreur de cette plaie lamentable des fonctions qui n'ont pas de derivees'. This was in part a reaction to the discovery by Weierstrasses of a continuous function which is not differentiable in any point. Hermite could hardly have imagined that Lebesgue just 10 years later would introduce a much larger class of functions--the Lebesgue measurable functions--and by doing so would create a completely new foundation for the mathematical analysis in the 20. century. Legesgue himself describes how many of his colleagues would tease him as being ``the man with functions without derivatives''.

Indhold

               

Man tilmelder sig kurset elektronisk på hjemmesiden https://secure.math.ku.dk/ua.

Forelæsninger

Tirsdag kl. 11-13 i aud. 4 ved Hans Plesner Jakobsen, som kan træffes på sit kontor E415, eller på telefon 35 32 06 89, eller pr. email jakobsen@math.ku.dk.

Første forelæsning er tirsdag d. 4. februar.


Question Session= Spørgetime

Thursday, June 12 at 2:15 p.m. in A103.

(I will be away for a conference in the week before the exam.)

The form of the Exam made precise (en præcissering af eksamensformen)

The two parts of the exam each last exactly 90 minutes. It is not possible to transfer time from one part to the other.

De to dele af eksamen varer hver præcist 90 minutter. Det er ikke muligt at overføre tid fra den ene del til den anden.


Information about the exam: FINAL Scores and Solutions to selected questions

OBS: New!

July 03 2003: Here are the final grades: DVI-fil - postscript-fil - PDF-fil.

Here are solutions to a few of the questions on the exam: DVI-fil -postscript-fil - PDF-fil.


News about the exam!

The written exam consists of two parts. The first 90 minutes are without any means of help ("closed book") and during this time an Essay Problem is do be finished and handed in. Here, one typically is asked to state and prove one or several specific propositions and theorems in a central topic from the course. In the remaining 90 minutes more traditional problems are to be solved, and here all usual means of help are allowed ("open book").

The essay problem will be one of the listed 14 problems The long list. Around 1 May 2003 (this will be made more precise) I choose, by some procedure, 5 of these problems and publish these on this web page. The idea is that the actual problem will be one of the 5 on this short list.

Here it is: The short list. Notice that it is different from previous exams!

In the actual exam, the essay problem will be accompanied by some remarks aimed at leading the student in the right direction. Se Old 3MI-exams (in Danish). There will both be an English and a Danish version of the exam. The students may use either language in their solutions.

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Syllabus (pensum) for the exam

The course material for the exam consists of the Lecture Notes ``Mål- og integralteori'' by Berg and Madsen (2003 edition) with the following EXCEPTIONS: The following parts of the syllabus are "cursory", i.e. you will be expected to know the material but not the proofs:

Øvelser

  Tid Lokale Instruktor
Hold 1 Tirsag kl. 9-11 A107 Morten Overgaard Hansen
Hold 2 Onsdag kl. 15-17 E-37 Klaus Kähler Holst

Bemærk, at Hold 3 er nedlagt.  moving-up.gif

Øvelsesholdene møder første gang i uge 7.  

Hjemmeopgaver

Der vil blive stillet hjemmeopgaver hver anden uge de første 8 uger af semesteret og hver uge de sidste 6 uger (ialt 10 sæt). Opgaverne afleveres til instruktoren, og du får dem tilbage i rettet stand. Aflevering af hjemmeopgaver giver dig mulighed for løbende at få afprøvet din forståelse af kurset og giver samtidigt en fremragende træning i at skrive matematik.

MatLab

MatLab er åbent alle hverdage kl. 10-17. Det holder til i lokale E32 (i bygningerne på den anden side af Jagtvejen; 155B i gården). Du kan her sidde og regne opgaver (lokalet kan altså bruges som læseplads). Endvidere er MatLab bemandet. Bemandingsplanen er:

Disse vil kunne besvare spørgsmål om opgaver mv. i 3MI (og andre matematikfag).

Lærebog

Vi benytter bogen "Mål- og integralteori" af Christian Berg og T age Gutmann Madsen, som kan købes i Naturfagsbogladen. Den koster 140 kr.

Supplerende noter:

Nedenstående supplerende noter har været anvendt i Matematik 2AN (efterårssemesteret 2001). Noterne om Lebesgueintegralet givet en kort oversigt over indholdet af nærværende kursus. Noterne om mængdelære (herunder om billeder og urbilleder) og om limes superior og limes inferior forudsættes kendte i dette kursus.

Supplerende litteratur:

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Ugesedler = weekly assignments

Det forventes, at du forbereder dig godt til øvelserne. Regn så mange af de stillede opgaver som muligt. Hvis dette en enkelt gang ikke lykkes, så forventes det som minimum, at du er bekendt med opgavernes problemstillinger. moving-up.gif

*Provisional* plan for the lectures and the exam

Uge Dato Afsnit i bogen Emne
6 4/2 §§ i, 0, 1     Introduction, measurable sets, sigma-algebras
7 11/2 § 3     Measures, examples, almost everywhere
8 18/2 § 2     Measurabale maps and functions, limits
9 25/2 § 4     The integral of simple and positive functions; convergence theorems
10 4/3 § 4     The integral of real and complex functions; convergence theorems
11 11/3 § 4.2, 4.7     More on integration, "differentiation under the integral sign"
12 18/3 § 4.3--4.6     More on integration
13 25/3 § 5.1     Uniqueness of measures
14 1/4 § 5.2, 5.3     Locally integrable functions, Radon measures
15 8/4 § 6.1, 6.2     Product measures
16 15/4 § 6.3     Fubini and Tonelli. (Last day of lectures and problem sessions before vacation.)
17 22/4     No lectures - Easter vacation! (Last day of vacation; so the Wednesday class meets in this week.)
18 29/4 § 7     Lp spaces.
19 6/5 § 7     Lp spaces. Fishers Completeness Theorem.
20 13/5 § 8     The Fourier transform of integrable functions.
21 20/5 § 8     The Fourier transform of Schwartz functions.
         
  23/6       Written Exam!
 

Dictionary = ordbog

measure = mål; null-set = nulmængde; almost everywhere (a.e.) = næsten overalt (n.o.); measurable = målelig; measure space = målrum; (infinite) series = (uendelig) række: sequence = følge; union = foreningsmængde; intersection = fællesmængde; w.r.t. = m.h.t. ; unique = entydig; teaching assistant (TA) = instruktor (); supremum (least upper bound [l.u.b.]) = supremum (mindste øvre grænse []); infimum (greatest lower bound [g.l.b.]) = infimum (største nedre grænse []) ; e.g. = f.eks.; i.e. = d.v.s.; counting measure = tællemål; (in)equality = (u)lighed       moving-up.gif

Misprints

Referencer


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Hans Plesner Jakobsen
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