Talk:Q161973
Latest comment: 6 years ago by Infovarius in topic Strictly 1D object?
Autodescription — curve (Q161973)
description: mathematical idealization of the trace left by a moving point
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Strictly 1D object? edit
d1g (talk) 16:42, 26 September 2017 (UTC)
- description object similar to a line but which is not required to be straight is "2D observer's description". Of course "1D observer's description" is ~continuous object. --Fractaler (talk) 17:58, 26 September 2017 (UTC)
- @Fractaler: well I don't exactly understand how 3D w:en:Spirals (ex. rhumb line (Q215169)) can be expressed using Q161973 if we have this claim:
- Should we understand "1D along their length"? Or replace it with better item?
- Should we remove this claim?
- d1g (talk) 11:00, 27 September 2017 (UTC)
- I think so. There are: object and object's space. We have: geometric space (0D, 1D, 2D, 3D, ...) and and its objects (point, line, plane, etc.). Objects of 0D-space can be in any space of greater dimension (but not vice versa, one-way direction): point - in 0D/1D/2D/3D/etc., line - in 1D/2D/3D/etc., and here we have 3 types of lines - a straight line and 2 curve - curve on 2D (plane curve (Q1060874)), curve in 3D space (spiral (Q189114)), plane - in 2D/3D/etc. Point is an geometric analog of number. A line is an analog of a numerical sequence, a sequence of points. --Fractaler (talk) 11:44, 27 September 2017 (UTC)
- Размерность множества и размерность пространства, в которое оно вложено, могут отличаться. Как это промоделировать, я пока не знаю. --Infovarius (talk) 12:10, 27 September 2017 (UTC)
- n-tuple (Q600590)? --Fractaler (talk) 12:27, 27 September 2017 (UTC)
- Не в тему. --Infovarius (talk) 15:19, 28 September 2017 (UTC)
- n-tuple (Q600590)? --Fractaler (talk) 12:27, 27 September 2017 (UTC)
@Infovarius, Fractaler: предлагаю просто создать свойство для "геометрическая размерность", а в описании указать включается только в большеразмерные пространства, а наоброт нельзя.
Ведь объекты типа линия нужно в первую очередь обозначить, а не каждое объект-пространство сочетание. d1g (talk) 19:38, 29 September 2017 (UTC)
- Не понял вас. Для размышления: Klein bottle (Q23638) - трёхмерный объект или четырёхмерный? --Infovarius (talk) 08:40, 2 October 2017 (UTC)