Two dimensions

There are two dimensions of the two-dimensional (にじげん, two dimensions) space. I call two dimensions of space with two dimensions space.

In addition, with the thing that the space here is the space in the mathematical general meaning not only physical space, and vary (the details refer to "a dimension").

Table of contents

Example of the two-dimensional figure

• Plane
  • Polygon
  • Japanese yen
• Curved surface
  • Spherical surface
  • Conicoid

Two-dimensional example

The following thing is in the imminent two dimensions.

• An image, a picture, a drawing, the map are two-dimensional.
• The sight of most creatures is two-dimensional in Homo sapiens at the start. But 2.5 dimensions of information that distance information was mapped onto by the stereoscopic vision with both eyes is provided.
• As for the line, a scalar is placed in the two dimensions.
• Two dimensions of life games are cellular automata.
• The complex number is expressed at a point on the two dimensions true space (Gaussian plane).

Two-dimensional characteristic

There is the following characteristic to two dimensions.

• It is the number of the only dimensions that a turn is shown to in a scalar.
• A regular polyhedron is the number of the only dimensions in the infinity.

Conversion

Name called two dimensions in the fiction

Typical two dimensions character

About the characters of comics, the animated cartoon, way of speaking called two dimensions is used many in a part. This is because a character is described with a plane (two dimensions space) picture, image by a master. The three-dimensional (three dimensions) expression including figure skating and the costume play is not only rarely done depending on a character. In modern Japanese, the word to be called two dimensions is often used as a metaphor to express "fiction" (not necessarily "the plane" which is an original meaning) while including such a point.

In addition, even if it is expressed on the plane including a picture, comics as for the actual character including the person in an idol, the history, call it with three dimensions, and this is done with a two-dimensional antonym in this context (as for the name called the raw thing, general about the creation about the real character).

By the way, in late years Thun rendering comes up in the expression of the character in the 3D space.

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This article is taken from the Japanese Wikipedia Two dimensions

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