master > master: protokoll - woche 13
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| 
 | ||||
| ## Agenda ## | ||||
| 
 | ||||
| - [ ] ein wenig Algebra: | ||||
|   - [ ] modulare Arithmetik | ||||
|   - [ ] zyklische (Unter)gruppen; Anwendung `ф(n) := ord((ℤ/nℤ)ˣ)`. | ||||
|   - [ ] der kleine Fermat: `a^ф(n) ≡ 1 mod n`. | ||||
| - [ ] Euklid: | ||||
|   - [ ] Rekursives Ausrechnen von `d := ggT(a,b)`. | ||||
|   - [ ] Extrahieren der Koeffizienten für die Gleichung `d = xa + yb`. | ||||
|   - [ ] Anwendung auf Sonderfall `d = 1` für Inversion modulo `n`. | ||||
| - [ ] Pollard-Rho | ||||
|     cf. <https://link.springer.com/article/10.1007/BF01933667> | ||||
|     und <https://www.cambridge.org/core/journals/mathematical-proceedings-of-the-cambridge-philosophical-society/article/theorems-on-factorization-and-primality-testing/6762E84DBD34AEF13E6B1D1A8334A989> | ||||
|   - [ ] Was liefert der Algorithmus? | ||||
|   - [ ] Was garantiert das? | ||||
| - [x] ein wenig Algebra: | ||||
|   - [x] modulare Arithmetik | ||||
|   - [x] zyklische (Unter)gruppen; Anwendung `ф(n) := ord((ℤ/nℤ)ˣ)`. | ||||
|   - [x] der kleine Fermat: `a^ф(n) ≡ 1 mod n`. | ||||
| - [x] Euklid: | ||||
|   - [x] Rekursives Ausrechnen von `d := ggT(a,b)`. | ||||
|   - [x] Extrahieren der Koeffizienten für die Gleichung `d = xa + yb`. | ||||
|   - [x] Anwendung auf Sonderfall `d = 1` für Inversion modulo `n`. | ||||
| - [x] Pollard-Rho | ||||
|   - [x] Was liefert der Algorithmus? | ||||
|   - [x] Was garantiert das? | ||||
|   - Referenzen: | ||||
|     - Algorithmus im Kurs (exp-Abstände), siehe: | ||||
|       </br> | ||||
|       <http://staff.ustc.edu.cn/~csli/graduate/algorithms/book6/chap33.htm> | ||||
|     - Andere Variante (lineare Abstände), siehe: | ||||
|       </br> | ||||
|       <https://link.springer.com/article/10.1007/BF01933667> | ||||
|       und | ||||
|       </br> | ||||
|       <https://www.cambridge.org/core/journals/mathematical-proceedings-of-the-cambridge-philosophical-society/article/theorems-on-factorization-and-primality-testing/6762E84DBD34AEF13E6B1D1A8334A989> | ||||
| 
 | ||||
| ### Nächste Woche/n ### | ||||
| 
 | ||||
|  | ||||
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