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Что (кто) такое 3-4-6-12 tiling - определение
3-4-6-12 tiling
 4.6.12; 3.4.6.4 Corrected Variant I.png?width=200 "160x160px")
 4.6.12; 3.4.6.4 Corrected Variant II.png?width=200 "160x160px")
 4.6.12; 3.4.6.4 Corrected Variant III.png?width=200 "160x160px")
 4.6.12; 3.4.6.4 Corrected Variant O.png?width=200 "160x160px")
In geometry of the Euclidean plane, the 3-4-6-12 tiling is one of 20 2-uniform tilings of the Euclidean plane by regular polygons, containing regular triangles, squares, hexagons and dodecagons, arranged in two vertex configuration: 3.4.
1 − 2 + 3 − 4 + ⋯
INFINITE SERIES
1 - 2 + 3 - 4 + · · ·; 1 - 2 + 3 - 4 + …; 1 - 2 + 3 - 4 + ...; 1 − 2 + 3 − 4 + …; 1−2+3−4+···; 1-2+3-4+···; 1-2+3-4+…; 1-2+3-4+...; 1−2+3−4+…; 1−2+3−4+...; 1-2+3-4+; 1-2+3-4; 1−2+3−4+; 1−2+3−4; 1 − 2 + 3 − 4 +; 1 − 2 + 3 − 4; 1 - 2 + 3 - 4 +; 1 - 2 + 3 - 4; 1 − 2 + 3 − 4 + . . .; 1 - 2 + 3 - 4 + . . .; 1 − 2 3 − 4 · · ·; 1 - 2 + 3 - 4 ...; 1 − 2 + 3 − 4 + · ·; 1 − 2 + 3 − 4 + ·; 1- 2 + 3 - 4; 1 − 2 + 3 − 4 + ...; 1 − 2 + 3 − 4 + ···; 1 − 2 + 3 − 4 + · · ·
In mathematics, 1 − 2 + 3 − 4 + ··· is an infinite series whose terms are the successive positive integers, given alternating signs. Using sigma summation notation the sum of the first m terms of the series can be expressed as
4-6-2
![Class 16E No. 858]]](https://commons.wikimedia.org/wiki/Special:FilePath/16E-Vetrivier-HGG.jpg?width=200 "Class 16E No. 858]]")
![[[New South Wales Government Railways]] [[3801]]](https://commons.wikimedia.org/wiki/Special:FilePath/3801 (NSW steam locomotive) 2.JPG?width=200 "[[New South Wales Government Railways]] [[3801]]")
.jpg?width=200 "Czechoslovakian 387.043 at the Lužná u Rakovníka Museum")
![''Paris à Orléans'']] 4546 at the Cité du train at Mulhouse](https://commons.wikimedia.org/wiki/Special:FilePath/4546 PO Mulhouse FRA 001.JPG?width=200 "''Paris à Orléans'']] 4546 at the Cité du train at Mulhouse")
![The [[LNER Peppercorn Class A1 60163 Tornado]], built in 2008](https://commons.wikimedia.org/wiki/Special:FilePath/60163 Tornado 1.jpg?width=200 "The [[LNER Peppercorn Class A1 60163 Tornado]], built in 2008")
![BR Standard Class 8 ''Duke of Gloucester'']]](https://commons.wikimedia.org/wiki/Special:FilePath/71000 DUKE OF GLOUCESTER East Lancashire Railway.jpg?width=200 "BR Standard Class 8 ''Duke of Gloucester'']]")
![Reading and Northern Railroad]] 4-6-2 locomotive in 1993](https://commons.wikimedia.org/wiki/Special:FilePath/BMR 423, 1993, Reading, Pennsylvania.jpg?width=200 "Reading and Northern Railroad]] 4-6-2 locomotive in 1993")
![[[Grand Duchy of Baden State Railways]] Class IVf](https://commons.wikimedia.org/wiki/Special:FilePath/Badische IVf Nr. 763.png?width=200 "[[Grand Duchy of Baden State Railways]] Class IVf")
![[[Canadian National]]'s Pacific no. 593](https://commons.wikimedia.org/wiki/Special:FilePath/Baldwin Pacific Class 4-6-2 steam locomotive, Humbermouth Historic Train site (Corner Brook, Newfoundland).JPG?width=200 "[[Canadian National]]'s Pacific no. 593")
![[[Canadian Pacific]] G3c class no. 2317](https://commons.wikimedia.org/wiki/Special:FilePath/Canadian Pacific 2317.jpg?width=200 "[[Canadian Pacific]] G3c class no. 2317")
![Victorian Railways Dde class]], c. 1910](https://commons.wikimedia.org/wiki/Special:FilePath/Dde702.jpg?width=200 "Victorian Railways Dde class]], c. 1910")
.JPG?width=200 "SJ Class F")
![''Flying Scotsman'']]](https://commons.wikimedia.org/wiki/Special:FilePath/Flying Scotsman in Doncaster.JPG?width=200 "''Flying Scotsman'']]")
![''Mallard'']], holder of the world speed record for steam traction.](https://commons.wikimedia.org/wiki/Special:FilePath/Mallard locomotive 625.jpg?width=200 "''Mallard'']], holder of the world speed record for steam traction.")
![A<sup>B</sup> class no. 778 on the ''[[Kingston Flyer]]''](https://commons.wikimedia.org/wiki/Special:FilePath/NZR Ab Class 778 hauling the Kingston Flyer.jpg?width=200 "A<sup>B</sup> class no. 778 on the ''[[Kingston Flyer]]''")
![''Havelock'']] as ''Hairy Mary'', c. 1898](https://commons.wikimedia.org/wiki/Special:FilePath/Natal 4-6-2TT Havelock as Hairy Mary.jpg?width=200 "''Havelock'']] as ''Hairy Mary'', c. 1898")
![[[Northern Pacific Railway]] 4-6-2 No. 2223 stops in Carrington, N.D., in February 1948.](https://commons.wikimedia.org/wiki/Special:FilePath/Northern Pacific locomotive, Carrington, N.D., 1948.jpg?width=200 "[[Northern Pacific Railway]] 4-6-2 No. 2223 stops in Carrington, N.D., in February 1948.")
![K4s]]](https://commons.wikimedia.org/wiki/Special:FilePath/PRR-K4s-Aberdeen.jpg?width=200 "K4s]]")
![''L'État'']] [[231 G Ouest]] no. 558, preserved by the ''Pacific Vapeur Club''](https://commons.wikimedia.org/wiki/Special:FilePath/Pacific 231G 558 -photo -2.JPG?width=200 "''L'État'']] [[231 G Ouest]] no. 558, preserved by the ''Pacific Vapeur Club''")
![Pm36-2 ''Beautiful Helene'' in [[Poznań]]](https://commons.wikimedia.org/wiki/Special:FilePath/Parowoz Pm36-2.jpg?width=200 "Pm36-2 ''Beautiful Helene'' in [[Poznań]]")
![[[LMS Princess Royal Class]] "Princess Elizabeth"](https://commons.wikimedia.org/wiki/Special:FilePath/Princess Elizabeth (cropped).jpg?width=200 "[[LMS Princess Royal Class]] \"Princess Elizabeth\"")
![CSAR Class 10 no. 656]], SAR no. 738](https://commons.wikimedia.org/wiki/Special:FilePath/SAR Class 10 738 (4-6-2) ex CSAR 656.jpg?width=200 "CSAR Class 10 no. 656]], SAR no. 738")
![Class 16B No. 805]] restored to its as-delivered appearance](https://commons.wikimedia.org/wiki/Special:FilePath/SAR Class 16B 805 Johannesburg 270378.jpg?width=200 "Class 16B No. 805]] restored to its as-delivered appearance")
![Class 16D no. 860]]](https://commons.wikimedia.org/wiki/Special:FilePath/SAR Class 16D 860 (4-6-2) (Big Bertha).jpg?width=200 "Class 16D no. 860]]")
![SAR Class 16 no. 800]], c. 1930](https://commons.wikimedia.org/wiki/Special:FilePath/SAR Class 16 800 (4-6-2).jpg?width=200 "SAR Class 16 no. 800]], c. 1930")
![SAR Class 5A]]](https://commons.wikimedia.org/wiki/Special:FilePath/SAR Class 5A 721 (4-6-2) CGR 903.jpg?width=200 "SAR Class 5A]]")
![[[Cape Government Railways]] Enlarged Karoo Class, SAR Class 5](https://commons.wikimedia.org/wiki/Special:FilePath/SAR Class 5 (4-6-2).jpg?width=200 "[[Cape Government Railways]] Enlarged Karoo Class, SAR Class 5")
![SAR Class C1]]](https://commons.wikimedia.org/wiki/Special:FilePath/SAR Class C1 77 (4-6-2T) NGR 38 ex NGR 25.jpg?width=200 "SAR Class C1]]")
.jpg?width=200 "SAR Class NG10 no. NG62, c. 1930")
![NGR Hawthorn Leslie, SAR Class NG3]]](https://commons.wikimedia.org/wiki/Special:FilePath/SAR Class NG3 4 (4-6-2T).jpg?width=200 "NGR Hawthorn Leslie, SAR Class NG3]]")
![SAR Class 2]]](https://commons.wikimedia.org/wiki/Special:FilePath/SAR Klasse 2.jpg?width=200 "SAR Class 2]]")
![CSAR Class 9 no. 600]], SAR no. 727](https://commons.wikimedia.org/wiki/Special:FilePath/SAR Klasse 9.jpg?width=200 "CSAR Class 9 no. 600]], SAR no. 727")
![ALCO-built Soo Line 2719 at [[Two Harbors, Minnesota]], 2009](https://commons.wikimedia.org/wiki/Special:FilePath/Soo Line 2719 Steams from Duluth to Two Harbors, MN.jpg?width=200 "ALCO-built Soo Line 2719 at [[Two Harbors, Minnesota]], 2009")
![Bavarian S 3/6 class, later Class 18.4-5 of the [[Deutsche Reichsbahn]]](https://commons.wikimedia.org/wiki/Special:FilePath/Steam Engine 18 478 S 3-6 2009-10-11.jpg?width=200 "Bavarian S 3/6 class, later Class 18.4-5 of the [[Deutsche Reichsbahn]]")
![P class]] no. 508](https://commons.wikimedia.org/wiki/Special:FilePath/Steam p508.jpg?width=200 "P class]] no. 508")
![Ukko-Pekka]]" class Hr1](https://commons.wikimedia.org/wiki/Special:FilePath/Ukkopekka.jpg?width=200 "Ukko-Pekka]]\" class Hr1")
WHEEL ARRANGEMENT OF A LOCOMOTIVE WITH 4 LEADING WHEELS, 6 DRIVING WHEELS AND 2 TRAILING WHEELS
Pacific (train); Pacific (locomotive); 4-6-2T; Pacific locomotive; 4-6-2 locomotive; 2-3-1; 4–6–2; Pacific type; Pacific train; Pacific type train
Under the Whyte notation for the classification of steam locomotives, represents the wheel arrangement of four leading wheels on two axles, six powered and coupled driving wheels on three axles and two trailing wheels on one axle. The locomotive became almost globally known as a Pacific type.
