the Heesch number of a shape is the maximum number of layers of copies of the same shape that can surround it with no overlaps and no gaps. Heesch's problem...
10 KB (899 words) - 07:34, 13 September 2024
Heesch can refer to: Heesch, Netherlands, a town in the Bernheze municipality Heinrich Heesch (1906–1995), German mathematician Heesch's problem in mathematics...
246 bytes (53 words) - 14:08, 26 June 2023
Bigalke, Hans-Günther. Heinrich Heesch, Kristallgeometrie, Parkettierungen, Vierfarbenforschung, Basel 1988. Heesch's problem http://www.ifg.uni-kiel...
3 KB (291 words) - 05:34, 3 June 2025
his work on Heesch's problem, to which he contributed a polygon with Heesch number 5. This problem is closely related to the einstein problem, of whether...
4 KB (338 words) - 09:21, 7 July 2023
1928. The first example in two dimensions was found by Heesch in 1935. The related einstein problem asks for a shape that can tile space but not with an...
3 KB (336 words) - 09:41, 29 May 2024
Four color theorem (redirect from Four colour problem)
generalization of the four-color problem that still remains unsolved. During the 1960s and 1970s, German mathematician Heinrich Heesch developed methods of using...
49 KB (6,277 words) - 23:39, 14 May 2025
good (and bad) approaches to the topic. The notes also identify unsolved problems, point out areas of potential application, and provide connections to other...
21 KB (1,465 words) - 14:30, 4 January 2025
Graph theory (redirect from List of problems in graph theory)
The four color problem remained unsolved for more than a century. In 1969 Heinrich Heesch published a method for solving the problem using computers...
50 KB (6,237 words) - 21:13, 9 May 2025
Tessellation (redirect from Tiling problem)
Shubnikov and Nikolai Belov in their book Colored Symmetry (1964), and Heinrich Heesch and Otto Kienzle (1963). In Latin, tessella is a small cubical piece of...
58 KB (6,055 words) - 17:49, 20 May 2025
Heesch is a German botanist, algologist, biogeographer, curator and explorer, and is a specialist in the taxonomy of algae families. In 2005 Heesch completed...
6 KB (694 words) - 18:37, 28 May 2025
without reflections or glide reflections, so answering a question of Heesch. The problem of anisohedral tiling has been generalised by saying that the isohedral...
6 KB (652 words) - 02:07, 15 June 2024
Belgium Antwerp 1 19 Walked Linda van den Akker 46 Orderpicker Netherlands Heesch 1 15 Evicted Fleur van der Vegt 31 Estate agent Netherlands Haarlem 1 8...
84 KB (1,841 words) - 04:24, 28 May 2025
Clarendon Press – via Perseus / Tufts U., Medford & Somerville, MA. q.v.. Heesch, Svenja; Serrano-Serrano, Martha; Barrera-Redondo, Josué; Luthringer, Rémy;...
60 KB (6,454 words) - 15:19, 10 June 2025
governmental measure, citing that other airports in the world seem to have no problems making public announcements in multiple languages. According to a poll...
62 KB (5,244 words) - 12:08, 14 June 2025
Obstetrics and Gynecology. 72 (4): 550–552. PMID 3419734. Brooks VL, Dampney RA, Heesch CM (August 2010). "Pregnancy and the endocrine regulation of the baroreceptor...
32 KB (3,327 words) - 19:39, 10 May 2025
composer Chess engine AlphaZero Deep Blue Leela Chess Zero Stockfish Chess problem glossary joke chess Chess prodigy Elo rating system Mechanical Turk Simultaneous...
510 KB (4,747 words) - 05:11, 14 June 2025
{{cite book}}: CS1 maint: multiple names: authors list (link) Dittami, SM; Heesch, S; Olsen, JL; Collén, J (2017). "Transitions between marine and freshwater...
59 KB (5,875 words) - 10:05, 25 May 2025
tessellations all satisfy the criterion. In 1963 the German mathematician Heinrich Heesch described the five types of tiles that satisfy the criterion. He shows each...
7 KB (789 words) - 13:19, 13 January 2024
Dominique; Duvette, Catherine; Marchand, Sylvie; Dorry, Mennat-Allah El; Heesch, Johan van (2020). "The End of the "green Oasis": Chronological Bayesian...
383 KB (43,881 words) - 10:45, 7 June 2025
criticism" (PDF). Quarterly Journal of Microscopical Science. 53: 279–326. Heesch, Svenja; Serrano-Serrano, Martha; Barrera-Redondo, Josué; Luthringer, Rémy;...
217 KB (23,124 words) - 18:45, 12 June 2025
from 1933 to 1945 in the Uchtspringe State Mental Institution" Eckhard Heesch: Marylene. Ein behindertes Kind im Dritten Reich. ("Marylene. A Disabled...
39 KB (5,527 words) - 07:55, 29 April 2025
Retrieved 4 October 2015. "Matthias Schoenaerts: 'I have a very interesting problem with authority'". The Irish Times. 2 May 2015. Retrieved 2 December 2015...
50 KB (3,468 words) - 19:18, 16 June 2025
single individual produces both male and female gametes), this is less of a problem since there is no sex ratio. Androgenesis can also occur through female...
21 KB (2,148 words) - 07:37, 8 June 2025
Wolfgang Haken (1928–2022). Haken learned about Heinrich Heesch's contributions to the Four Color Problem and enthusiastically Weise's lectures on topology....
8 KB (832 words) - 20:25, 15 February 2025
22 (10): 845–50, 855. doi:10.1016/s0033-3182(81)73092-5. PMID 7313045. Heesch CM, Negus BH, Keffer JH, Snyder RW, Risser RC, Eichhorn EJ (August 1995)...
275 KB (29,157 words) - 19:16, 16 June 2025
581–586. doi:10.1016/0735-1097(91)90617-I. ISSN 0735-1097. PMID 1906905. Heesch, C. M.; Wilhelm, C. R.; Ristich, J.; Adnane, J.; Bontempo, F. A.; Wagner...
37 KB (4,224 words) - 23:08, 29 May 2025
the tent map. If r > 4, this leads to negative population sizes. (This problem does not appear in the older Ricker model, which also exhibits chaotic...
145 KB (18,842 words) - 07:07, 2 June 2025
creation of the A50 highway, a dig site was opened at the border of Oss, Heesch and Geffen. After the construction of the highway was completed this area...
7 KB (670 words) - 17:29, 28 December 2024
Rowman & Littlefield Publishers. p. 200-201. ISBN 9781442247970. Florian Heesch, Reinhard Kopanski. 2017. "Klang - Text - Bild: Intermediale Aspekte der...
17 KB (2,132 words) - 08:30, 2 May 2025
Weinstein, Deena (July 7, 2016). "Playing with gender in the key of metal". In Heesch, Florian; Scott, Niall (eds.). Heavy Metal, Gender and Sexuality. Taylor...
288 KB (23,340 words) - 05:59, 14 June 2025