Understanding Geometry – 3

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In some of my past posts, I have mentioned “hyperbolic curvature“,”hyperbolic trigonometry” and “hyperbolic ideal points“. In this post I will share some artworks, based on hyperbolic geometry, by contemporary artists (from Tumblr):

To explain the mathematics behind the construction of these pictures I will quote Roger Penrose from pp. 34 of  “The Road to Reality“:

Think of any circle in a Euclidean plane. The set of points lying in the interior of this circle is to represent the set of points in the entire hyperbolic plane. Straight lines, according to the hyperbolic geometry are to be represented as segments of Euclidean circles which meet the bounding circle orthogonally — which means at right angles. Now, it turns out that the hyperbolic notion of an angle between any two curves, at their point of intersection, is precisely the same as the Euclidean measure of the angle between the two curves at the intersection point. A representation of this nature is called conformal. For this reason, the particular representation of hyperbolic geometry that Escher used is sometimes referred to as the conformal model of hyperbolic plane.

In the above-quoted paragraph, Penrose refers to Escher’s “Circle Limit” works, explained in detail by Bill Casselman in this article.

3 responses

1. I’m amazed, I have to admit. Seldom do I encounter a blog that’s equally educative and interesting, and let me tell you, you have hit the nail on the head. The issue is something which too few people are speaking intelligently about. I’m very happy that I stumbled across this in my search for something regarding this.

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2. Certainly…one of the best little series in geometry ..very entertaining and educational…I don’t have so much background in geometry — so it has created lots of beautiful homeworks for me also…:-)

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3. I really liked protobacillus. Went to the site. Pictures amazing. Repetition not so.

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