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-FOLD [1 record]
Record 1 - internal organization data 2003-03-25
Record 1, English
Record 1, Subject field(s)
- Plane Geometry
- Mineralogy
Record 1, Main entry term, English
- -fold
1, record 1, English, %2Dfold
correct, suffix
Record 1, Abbreviations, English
Record 1, Synonyms, English
Record 1, Textual support, English
Record number: 1, Textual support number: 1 DEF
(suffix) Multiplied by ... 2, record 1, English, - %2Dfold
Record number: 1, Textual support number: 1 CONT
A twelvefold increase ... threefold aspect of a problem ... 2, record 1, English, - %2Dfold
Record number: 1, Textual support number: 2 CONT
symmetry: In general, a figure or expression is said to be symmetric if parts of it may be interchanged without changing the whole. ... A right circular cone has an axis of symmetry. A geometric figure has n-fold rotational symmetry about an axis if a rotation of 360°/n is a symmetry of the figure. Thus an axis of symmetry can be a rotational axis. For example, an axis through the centre of a square perpendicular to the plane is a 4-fold axis since a rotation of 360°/4 produces an identical figure; a diagonal is a 2-fold axis. 3, record 1, English, - %2Dfold
Record number: 1, Textual support number: 3 CONT
The cube shows rotational symmetry with respect to 3 axes, 2-fold with respect to the center of an edge, 3-fold with respect to a vertex, 4-fold with respect to a face. 4, record 1, English, - %2Dfold
Record 1, Key term(s)
- fold
Record 1, French
Record 1, Domaine(s)
- Géométrie plane
- Minéralogie
Record 1, Main entry term, French
- d'ordre
1, record 1, French, d%27ordre
correct
Record 1, Abbreviations, French
Record 1, Synonyms, French
Record 1, Textual support, French
Record number: 1, Textual support number: 1 CONT
Système cubique : axes de rotation d'ordre 4 [...]; axes de rotation d'ordre 3 [...]; axes de rotation d'ordre 2 [...] 2, record 1, French, - d%27ordre
Record number: 1, Textual support number: 2 CONT
D. Schechtman et ses collaborateurs [...] ont obtenu un diagramme de diffraction icosaédrique présentant une symétrie d'ordre cinq. Qu'y a-t-il de si surprenant? Tout simplement, on sait depuis le XVIIIe siècle que la symétrie pentagonale - tout comme les symétries d'ordre égal ou supérieur à 7 - est interdite dans la structure tripériodique des cristaux. 3, record 1, French, - d%27ordre
Record 1, Spanish
Record 1, Textual support, Spanish
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