Study-Unit Description

Study-Unit Description


CODE MAT3226

 
TITLE Geometry of Euclidean Spaces

 
UM LEVEL 03 - Years 2, 3, 4 in Modular Undergraduate Course

 
MQF LEVEL 6

 
ECTS CREDITS 5

 
DEPARTMENT Mathematics

 
DESCRIPTION (I) Elementary Combinatorial Techniques:

- Affine Notions (linear, affine and convex combinations, linear and affine independence);
- Simplexes (n-dimensional simplex, affine coordinates, vertices and faces, geometric simplex, boundary and barycenter);
- Triangulation (simplicial complex, geometric realization, triangulation, barycentric triangulation);
- Simplexes in Euclidean Spaces (faces of n-dimensional simplexes, Sperner's lemma).

(II) Fundamental Properties of Euclidean Spaces:

- Knaster–Kuratowski–Mazurkiewicz Theorem;
- Brouwer Fixed-Point Theorem;
- Borsuk Non-Retraction Theorem;
- Non-Homogeneity Theorem;
- Brouwer Dimension Invariance Theorem.

Study-unit Aims:

The aim of this study-unit is to give a connected and simple account of the most essential topological properties of Euclidean spaces. Students will be exposed to several classical results, for instance Sperner's lemma and Brouwer Fixed-Point theorem, which have many applications also outside topology. Another notable result the students will see is the Brouwer Dimension Invariance Theorem that the Euclidean n-space and the Euclidean m-space are not topologically equivalent unless n equals m. This study-unit will give also a brief account of a topological invariant of Euclidean spaces - the so called Lebesgue's dimension.

Learning Outcomes:

1. Knowledge & Understanding:

By the end of the study-unit the student will be able to:
- Use basic combinatorial techniques and work with such fundamental concepts as simplex, simplicial complex, triangulation and geometric realization;
- Know more about topological properties of Euclidean spaces, and their special subsets (such as spheres, balls, cubes, simplexes);
- See applications of such fundamental topological concepts as compactness and connectedness.

2. Skills:

By the end of the study-unit the student will:
- Have a rough idea of the proofs of several classical results (such as Sperner's lemma, Brouwer Fixed-Point theorem, Non-Retraction theorem, Non-Homogeneity theorem, Knaster–Kuratowski–Mazurkiewicz theorem) and the methods used in these proofs.
- Be able to improve the handling of several topological techniques by seeing how abstract concepts are deployed in particular situations.
- Have a foundation to follow related more advanced study-units.

Main Text/s and any supplementary readings:

Lecture Notes covering all topics.

Textbooks:

- Jan van Mill, Infinite-Dimensional Topology, Prerequisites and Introduction, Volume 43 (North-Holland Mathematical Library), Elsevier Science Publisher B.V., 1989.
- Jan van Mill, The Infinite-Dimensional Topology of Function Spaces, Volume 64 (North-Holland Mathematical Library), Elsevier Science Publisher B.V., 2001.

 
ADDITIONAL NOTES Follows from: MAT3215, MAT3225

 
STUDY-UNIT TYPE Lecture and Independent Study

 
METHOD OF ASSESSMENT
Assessment Component/s Assessment Due Sept. Asst Session Weighting
Examination (2 Hours) SEM2 Yes 100%

 
LECTURER/S Valentin Gutev

 

 
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It should be noted that all the information in the description above applies to study-units available during the academic year 2023/4. It may be subject to change in subsequent years.

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