Sybase Logo.  What math function is it called?   Bella Saturday, November 01, 2003 It looks kind of like the illustration of the Golden Ratio: http://mathworld.wolfram.com/GoldenRectangle.html anon Saturday, November 01, 2003 I'd say more that kinda. B# Saturday, November 01, 2003 Specifically, it's a logarithmic spiral. anon Saturday, November 01, 2003 It's usually referred to as the Golden Spiral in my experience. *monad Saturday, November 01, 2003 It's called a fractal. http://www.cs.berkeley.edu/~ddgarcia/ucbugg/Sp2001Fractal.pdf Realist Saturday, November 01, 2003 If memory serves, it's the same spiral as the Nautilus shell. It's built by putting squares next to each other, following the fibonacci sequence: x(n) = x(n-1) + x(n-2) whose first few digits are 1  1  2  3  5  8  13  21 So: take a square with length 1, stick a square with length 1 next to it, then a square with length 2, 3, 5, etc. Do this clockwise or counterclockwise. Then you draw quarter circles going through opposite corners of each of these squares. If you look at the logo, the two smallest inner squares have length 1, the one above it 2, the one to the left 3, the one beneath 5 Yves Sunday, November 02, 2003 Ok, what does this logo have to do with relational databases? anon Sunday, November 02, 2003 It's called an Archimedes Spiral. Claw Monday, November 03, 2003 Sorry... I take back my comment above.  I was thinking of the wrong spiral.  It's actually a logarithmic spiral. Claw Monday, November 03, 2003 It is *almost* a logarithmic spiral... The sprial as shown is composed of circle segments. Each circle segment is a quarter of a circle, with the centre of the circle being placed in one of the corners of the square. Karel Thönissen Monday, November 03, 2003 Oops, I should read before posting. The correct answer is on the page. I stand corrected. Karel Thönissen Monday, November 03, 2003 You *don't* get exactly a logarithmic spiral by putting together Fibonacci-sized squares, though after the first few squares are in place it's pretty close. The Sybase logo looks to me as if it is made from Fibonacci-sized squares, except that the two 1s have lost the line dividing them. A logarithmic spiral inscribed in a golden rectangle divided into squares doesn't exactly touch the sides, but the spiral in the Sybase logo is tangent to the sides at the corner points. So, on at least two different grounds, the Sybase logo appears not to be exactly a logarithmic spiral. But it's pretty close. A logarithmic spiral is not a fractal. I don't think the supporting pattern of rectangles is a fractal either, but I haven't checked. If you google for "spiral site:sybase.com" you'll find some blather from some senior person at Sybase about what it's supposed to symbolize. Gareth McCaughan Monday, November 03, 2003   Fog Creek Home