David Stanovský
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25.2. | Motivation, examples. Translations, division and inverses. |
notes: 1 2 3+5 4 |
4.3. | Semigroups: basic facts, Green's theory. |
notes: 1 2 3 4 5 6 7 |
11.3. | Semigroups: regularity, intro to inverse semigroups. |
notes |
18.3. | Inverse semigroups: Vagner-Preston theorem, congruences. |
notes |
25.3. | Inverse semigroups: Lallement's lemma. Completely regular semigroups: an overview. Mediality: an introduction. |
notes: 17A 17B 22 23 24 25 |
1.4. | Linearization problem. Principal isotopy, Toyoda's theorem. |
notes on principal isotopy: 1 2 3
notes on mediality: 1 2 3
4 5 6 7 |
15.4. | Quandles: coloring knots, the structure of algebraically connected quandles. |
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22.4. and on | Aleš Drápal talks |
HOMEWORKS --- final version.
I suggest you work all the exercices. To pass my part of the course, you need to completely solve at least half of the exercises marked [!], i.e., nine.
Should you have any questions about the exercises, write me an email. In particular, if you find a wrong exercise, unclear or invalid statement, etc., please let me know.
Literature:
- John Howie: Fundamentals of Semigroup Theory (we loosely follow this book), or any other textbook on semigroups.
- A brief overview of non-associative algebra (even more motivation)
- Hala Pflugfelder: Quasigroups and loops: introduction for more details on quasigroups (medial in particular)
- a text on quandle coloring - not really good for the purposes of this lecture, but still the best I could find
(let me know if you want to read more on knots, I can recommend some texts depending on your preferences)
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