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- In mathematics, the HNN extension is an important construction of combinatorial group theory. Introduced in a 1949 paper Embedding Theorems for Groups...7 KB (963 words) - 19:57, 6 June 2024
- HNN may refer to: HLN (TV channel), an American television news channel HNN extension, in combinatorial group theory Hanunó'o language, spoken in the...395 bytes (78 words) - 04:57, 8 November 2021
- mechanics. Lie algebra extension Virasoro algebra HNN extension Group contraction Extension of a topological group group+extension#Definition at the nLab...13 KB (1,997 words) - 00:34, 8 October 2023
- Bass–Serre theory (section HNN extension)applications of the operations of free product with amalgamation and HNN extension, via the notion of the fundamental group of a graph of groups. Bass–Serre...41 KB (5,901 words) - 05:59, 12 January 2024
- polynomial time. The Baumslag–Gersten group G can also be realized as an HNN extension of the Baumslag–Solitar group B S ( 1 , 2 ) = ⟨ a , b ∣ a b = a 2 ⟩...7 KB (989 words) - 07:30, 8 November 2023
- constructed from finite groups using amalgamated free products and HNN extensions. Using the action of the modular group on a certain tessellation of...9 KB (1,367 words) - 14:22, 13 May 2024
- Section 5 of Chapter IV of Lyndon and Schupp for the Moldavansky's HNN-extension version of that approach. Let G be a one-relator group given by presentation...27 KB (4,548 words) - 21:00, 4 May 2024
- normal form theorems for a free product with amalgamation and for an HNN extension (Bass 1993). Let Γ be the fundamental group corresponding to the spanning...7 KB (827 words) - 00:09, 10 January 2023
- Kurosh subgroup theorem (section Extension)generalized for describing subgroups of amalgamated free products and HNN extensions. Other generalizations include considering subgroups of free pro-finite...6 KB (921 words) - 17:05, 10 August 2023
- Scholarship, Wrong Conclusions". HNN Special: A Symposium on Jonah Goldberg's Liberal Fascism. George Mason University (HNN). Archived from the original on...9 KB (673 words) - 01:30, 24 May 2024
- admits a nontrivial decomposition as an amalgamated free product or an HNN extension over a finite subgroup. In the modern language of Bass–Serre theory...22 KB (3,375 words) - 03:49, 6 May 2024
- admits a nontrivial splitting as an amalgamated free product or as an HNN extension over a finite group (that is, in terms of Bass–Serre theory, if and...31 KB (3,594 words) - 08:32, 23 June 2024
- practice. The algorithm is shown to be in GenL. The conjugacy problem in HNN extensions can be unsolvable even for free groups. However, it is generically cubic...18 KB (2,706 words) - 15:11, 31 May 2024
- Higman's embedding theorem Feit-Higman theorem Higman group Higman's lemma HNN extension Hall–Higman theorem Conder, Marston D. E. (2022). "Graham Higman. 19...6 KB (479 words) - 20:30, 2 December 2023
- for a knot K, then the fundamental group of S3 − N(K) splits as an HNN extension over π1(S), which is a free group. The two maps from π1(S) into π1(S3...8 KB (1,121 words) - 13:08, 20 January 2022
- graph. Every right-angled Artin group of rank r can be constructed as HNN extension of a right-angled Artin group of rank r − 1 {\displaystyle r-1} , with...20 KB (2,995 words) - 09:20, 5 January 2024
- celebrating women's achievements in mathematics. Hanna Neumann conjecture HNN extension February 12#Births Fowler, Kenneth F. "Neumann, Hanna (1914–1971)"....11 KB (1,019 words) - 10:28, 21 June 2024
- Novikov–Boone theorem via a clever use of amalgamated products and HNN extensions. Let P {\displaystyle P} be a Markov property and let A + , A − {\displaystyle...8 KB (1,121 words) - 09:44, 30 December 2023
- prize named in his honour. The group-theoretic notion of HNN (Higman-Neumann-Neumann) extension bears the names of Bernard and his wife Hanna, from their...6 KB (510 words) - 15:03, 2 March 2024
- Schreier's method, Nielsen's method, free presentations, subgroups and HNN extensions, Golod–Shafarevich theorem, etc. Sims, Charles C. (1994). Computation...22 KB (2,422 words) - 10:57, 11 June 2024
- etc. (2) Ultimate Affection: collen ‘hazel’, pl. cɥll; onnen ‘ash’, pl. ɥnn; dalen w.m. 231, r.m. 167, Ps. i 3 ‘leaf’, pl. dail, chwannen ‘flea’, pl
- frivolous one. David Horowitz, "David Horowitz Versus Christopher Hitchens" at hnn.us. Article 893 (First published at frontpagemagazine.com), Accessed May