thrackle.org
The Thrackle ProblemThis website is dedicated to a mathematical question: the thrackle problem. It was posed by John Conway in the late sixties and has still not been solved.
http://www.thrackle.org/
This website is dedicated to a mathematical question: the thrackle problem. It was posed by John Conway in the late sixties and has still not been solved.
http://www.thrackle.org/
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The Thrackle Problem | thrackle.org Reviews
https://thrackle.org
This website is dedicated to a mathematical question: the thrackle problem. It was posed by John Conway in the late sixties and has still not been solved.
thrackle.org
The Thrackle Problem
http://www.thrackle.org/thrackle.html
What is known about the Thrackle Problem. First up: May 7, 1996. Major update: March 23, 2000. Adding sequence types for 11-cycle: March 7, 2010. Last update: March 7, 2010. In the late sixties, John Conway posed the following problem:. A thrackle embedding of a graph is a function which maps each vertex to a point and each edge to a closed continuous lines in the plane such that. No line crosses itself. Each two lines intersect exactly once. What would a counterexample look like? The graph embedded on t...
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Stephan Wehner » internet
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Snowden, NSA, etc. January 20, 2014. It’s been a while since Edward Snowden. Started revealing details about the global surveillance operations of the NSA. I’ve been meaning to write down a few thoughts for a long time, but didn’t quite find the time; however they still seem interesting enough now, so let’s go. 1 Insulting the whole world. This also goes for everyone defending these actions. How dare you? When I first heared of the extensive surveillance systems, I thought, well, if they really have this...
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Mar/April, design 2. Mar/April, design 1. Melbourne: City of Math. Snakes on a Plane. From Keyfobs to Ringtones. Vector vs. Raster. Deadly Rooms of Death. A Zillion Connection Games. Ten Trillion Zeta Zeros. 64K or Less - Demoscene. Chromatic Number of the Plane. Stability of the Atom. World Puzzle Championship 2000. Material added 27 August 06. Travelling Salesman Problem Art. Robert Bosch: This summer, I finally had the time to put together a page on my TSP Art. The first two are surprising! Back in 20...
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The Thrackle Problem
This drawing shows a few lines connecting a few points such that each two lines intersect each other exactly once - when one counts common endpoints as intersections. Can one have more lines than points in this way? In this case the number is the same: there are six points and six lines. And in this case it is not possible to add a line between two points which intersects all other lines just once! This problem is known as John Conway's Thrackle Problem.
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