What would be an appropriate logo for our site which promotes things both mathematical and magical?
We thought about the keywords "math" and "magic" and mused about magic numbers. Then we got the answer (it was there, right under our nose) - a numeric yantra.
We based our logo on a yantra borrowed from the Vedic science of Jyotisha (Astronomy/Astrology) which is built on the foundation of Ganita (Mathematics). Numeric yantras have long been used in Astrology to represent the powers of the navagrahas (the nine key planets). They are basically a matrix of numbers in magic square-like arrangement.
Behold the ultimate numeric yantra -- the Shri Rama Yantra -- a 4 x 4 matrix of magic numbers. It's our logo.
Up There are also numeric yantras representing the navagrahas, the nine key planets of Vedic Astrology. These yantras are 3 x 3 matrix of magic square numbers, with the planet's number in the top middle cell. The Sun, the king and central figure of the navagrahas, is
numero uno (1), followed by the Moon (2), Mars (3), Mercury (4), Jupiter (5), Venus (6), Saturn (7), Rahu (8), Ketu (9).