VO 250041-1 and PS 250062-1 Advanced Measure Theory.

Lecturer: Henk Bruin

Please email Henk Bruin for more information on this course.

Information from the Course catalogue and for the Proseminar.

Announcements


No Exercise Class in the first week (October 2).

Schedule

Day Time Room Type From To
Wednesday 8:00 - 9:30 HS11 Lecture01.10.202528.01.2026
Thursday 11:30 - 13:00 SR7 Proseminar 02.10.202529.01.2026
Friday 13:15 - 14:45 HS13 Lectures03.10.202530.01.2026

Weekly progress
















Exercises for the Proseminar of Week 14: Bass 5.0: Exercises 15.25, 15.26, 17.1, 17.3, 17.4, 17.5, 17.8, 17.9
Deadline for the check-list is Thursday January 8 at 10am (but you can still tick the exercise list today in class
Exercises for the Proseminar of Week 15 on this exercise sheet.
Deadline for the check-list is Thursday January 21 at 10am.
Exercises for the Proseminar of Week 16
Week 1TypeTopic/Material
October 1LectureIntroduction, Sigma-Algebras
Bass 5.0 Chapter 2
October 2Proseminar
Not this week yet
Exercises for the Proseminar of Week 2:
Exercise Bass 5.0: Exercise 2.1 - 2.9 and 20.2, 20.7, 20.12
In the attached file, I collected chatGPT solutions for five of these.
If you tick these, you must be able to discuss the chatGPT solution.
Are they correct? If not, can you correct them?
You should also be able to clarify the difficult or possibly obscure steps.

I will create a Moodle page with tick-list shortly. Deadline for this tick-list is Thursday October 9 at 10am
October 3Lecture Introduction to topology
Sets of 1st and 2nd category
Week 2 TypeTopic/Material
October 8 Lectureouter measure. Carathéodory's Theorem
Bass 5.0 Chapter 4.1
October 9Proseminar Exercises for the Proseminar of Week 2:
Exercise Bass 5.0: Exercise 2.1 - 2.9 and 20.2, 20.7, 20.12
In the attached file, I collected chatGPT solutions for five of these.
If you tick these, you must be able to discuss the chatGPT solution.
Are they correct? If not, can you correct them?
You should also be able to clarify the difficult or possibly obscure steps.

Deadline for this tick-list is Thursday October 16 at 10am
October 10Lecture Lebesgue measure
Non-measurable sets
Bass 5.0 Chapter 4.2-4.4
Oxtoby Chapter 5
Week 3 TypeTopic/Material
October 15 LectureNon-meaurable sets. Set swith the Baire property.
Bass 5.0 Chapter 4.4
Oxtoby Chapter 4
October 16Proseminar Exercises for the Proseminar of Week 3:
Exercise Bass 5.0: Exercise 3.2 - 3.10

Deadline for the check-list is Thursday October 16 at 10am
October 17Lecture No lecture this Friday
Week 4 TypeTopic/Material
October 22 LectureNon-meaurable sets.
Baire spaces Theorem of Baire

Oxtoby Chapter 9
October 23Proseminar Exercises for the Proseminar of Week 4: Bass 5.0:  Exercise 4.1, 4.3-4.10
Deadline for the check-list is Thursday October 23 at 10am
October 24Lecture Carathéory Extension Theorem
Lebesgue density theorem.
Bass 5.0 Chapter 4.5
Lebesgue Density Theorem
Week 5 TypeTopic/Material
October 29 LectureProof of Lebesgue Density Theorem
Integration
Lebesgue Density Theorem
Bass 5.0 Chapter 5.1 - 5.2
October 30Proseminar Exercises for the Proseminar of Week 5: Bass 5.0: Exercise 4.11, 4.12, 4.14
Deadline for the check-list is Thursday October 30 at 10am
October 31Lecture Measurable functions
Lusin's Theorem
Bass 5.0 Chapter 5.3
Week 6 TypeTopic/Material
November 5 Lecture Lusin's Theorem
Integrable functions
Monotone Convergence Theorem
Bass 5.0 Chapter 6 and 7
November 6Proseminar Exercises for the Proseminar of Week 6: Bass 5.0: Exercises 5.1-5.10.
Deadline for the check-list is Thursday November 6 at 10am
November 7Lecture
Fatou's Lemma
Dominated Convergence Theorem
Lebesgue vs. Riemann integrable
Bass 5.0 Chapter 7 and 9
Week 7 TypeTopic/Material
November 12 Lecture Lebesgue vs. Riemann integrable
Diophantine and Liouville numbers
Bass 5.0 Chapter 9
Oxtoby Chapter 2
November 13Proseminar Exercises for the Proseminar of Week 7: Bass 5.0: Exercises 6.3, 6.5, 6.8 and 6.9.
Deadline for the check-list is Thursday November 13 at 10am
November 14Lecture Diophantine and Liouville numbers
Product measures
Oxtoby Chapter 2
Bass 5.0 Chapter 11.1
Week 8 TypeTopic/Material
November 19 Lecture Fubini's Theorem

Bass 5.0 Chapter 11.2
November 20Proseminar Exercises for the Proseminar of Week 8: Bass 5.0: Exercises 7.2-7.7 and 7.13.
(If you really have trouble with 7.2, try this video.)
Deadline for the check-list is Thursday November 20 at 10am
November 21Lecture signed measures, Hahn and Jordan decompositions
Bass 5.0 Chapter 12
Week 9 TypeTopic/Material
November 26 Lecture We start today at 8:45 - from your side, read the proofs of the Hahn decomposition and the Jordan decomposition
Hahn and Jordan decompositions
The Radon-Nikodym Theorem

Bass 5.0 Chapter 12+13
November 27Proseminar Exercises for the Proseminar of Week 9: Bass 5.0: Exercises 11.4, 11.5, 11.6, 11.9, 11.14.
Deadline for the check-list is Thursday November 27 at 10am
November 28Lecture The Radon-Nikodym Theorem
Bass 5.0 Chapter 12
Week 10 TypeTopic/Material
December 3 Lecture
Lp-space, Hölder and Minkovski inequalities
Bass 5.0 Chapter 15.1-2
December 4Proseminar Exercises for the Proseminar of Week 10: Bass 5.0: Exercises 12.1, 12.3, 12.5, 12.7, 13.1, 13.5, 13.9, 13.12
Deadline for the check-list is Thursday December 4 at 10am
December 5Lecture
Convolutions Bass 5.0 Chapter 15.3
Week 11 TypeTopic/Material
December 10 Lecture
Linear functionals and dual spaces
Bass 5.0 Chapter 15.4
December 11Proseminar Exercises for the Proseminar of Week 11: Bass 5.0: Exercises 15.1-15.5, 15.8, 15.11, 15.12
Deadline for the check-list is Thursday December 11 at 10am
December 12Lecture Duality proof of Lp
Partitions of unity
Bass 5.0 Chapter 15.4 and 17.1
Week 12 TypeTopic/Material
December 17 Lecture
Riesz Representation Theorem
Bass 5.0 Chapter 17.2
December 18Proseminar Exercises for the Proseminar of Week 12: Bass 5.0: Exercises 15.15-18, 15.24, 15.29
Deadline for the check-list is Thursday December 18 at 10am
December 19No Lecture
Week 13 TypeTopic/Material
January 7 Lecture
Lecture cancelled.
Bass 5.0 Chapter
January 8Proseminar Proseminar cancelled
January 9No Lecture

Week 14 TypeTopic/Material
January 14 Lecture
Regular measures
Summary of the Measure Theory so far.
January 15Proseminar
January 16Lecture Fractals and Hausforff dimension/measures
Troscheit's Notes Chapter 1

Week 15 TypeTopic/Material
January 21 Lecture
January 22Proseminar
January 23Lecture

Week 16 TypeTopic/Material
January 28 Lecture
January 29Proseminar
January 23Lecture
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Assessment

By oral examination by appointment.

References and resources



Updated January 2026