File:Ascending and Descending.jpg

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Ascending_and_Descending.jpg(275 × 363 pixels, file size: 24 KB, MIME type: image/jpeg)
Non-free media information and use rationale for Ascending and Descending
Description

Ascending and Descending, by M. C. Escher. Lithograph, 1960.

Source

Official M. C. Escher website

Article

Ascending and Descending

Portion used

It represents the complete work.

Low resolution?

It is a low-resolution image.

Purpose of use

It illustrates an educational article about the lithograph print that this image represents.

Replaceable?

It is not replaceable with an uncopyrighted or freely copyrighted image of comparable educational value.

Fair useFair use of copyrighted material in the context of Ascending and Descending//en.wikipedia.org/wiki/File:Ascending_and_Descending.jpg
Non-free media information and use rationale for Penrose stairs
Description

Ascending and Descending, by M. C. Escher. Lithograph, 1960.

Source

Official M. C. Escher website

Article

Penrose stairs

Portion used

It represents the complete work.

Low resolution?

It is a low-resolution image.

Purpose of use

The lithograph is uniquely connected to the article, as (1) the Penrose's discovery of the Penrose stairs was triggered by seeing Escher's earlier work, (2) in turn Escher's creation of Ascending and descending was triggered by seeing the Penrose stairs, and (3) Escher presented the lithograph to Penrose in gratitude. The image both illustrates this remarkable dialogue of mathematics and art, and shows that the lithograph embodies Penrose stairs in its construction.

Replaceable?

No copyright-free image of the lithograph exists.

Fair useFair use of copyrighted material in the context of Penrose stairs//en.wikipedia.org/wiki/File:Ascending_and_Descending.jpg

File history

Click on a date/time to view the file as it appeared at that time.

Date/TimeThumbnailDimensionsUserComment
current07:33, 10 September 2009Thumbnail for version as of 07:33, 10 September 2009275 × 363 (24 KB)Pais (talk | contribs)low resolution
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