Mathematics - Recreational Math

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Thread	Last Post	Replies

Recommendations for learning more mathematics	28 Jun 2006 21:56 GMT	7
Hopefully this won't be too rambling, or worse, vague. I've just finished a computer science degree(my first degree). Like most people I've come across a handful of maths over the years, however what has often has bothered me is that I don't really have a good understanding
Domino Fall Speed	28 Jun 2006 14:42 GMT	4
What is the domino fall speed? How to figure knowing the domino size and the distance between them? Is there any site about domino fall path construction, size records, number of pieces records and other info´s?
1^e+2^e+...+n^e = ?	27 Jun 2006 22:07 GMT	5
It is easy enough to prove by mathematical induction that 1 + 2 + ... + n = (1/2)n(n+1) 1^2 + 2^2 + ... + n^2 = (1/6)n(n+1)(2n+1) It is also easy to prove that
Nicomachus's theorem	27 Jun 2006 03:27 GMT	3
Nicomachus's theorem says 1^3 + 2^3 + ... + n^3 = (1 + 2 + ... +n)^2 (I learned its name at http://mathworld.wolfram.com/PowerSum.html). Does this equality have any geometric interpretation
Integer Box	26 Jun 2006 15:38 GMT	1
Construct an oblong box such that the length of each side and the length of the diagonal of each face is a whole multiple of unit length. Or: Show that it can't be done.
Vladimir Bondarenko: Credits	23 Jun 2006 00:39 GMT	5
Before proceeding, in a reasonably near future, to some issues of vital importance, both for the customers and the manufacturers, I would like to express my gratitude to these persons.
Conic surface from pentagram	23 Jun 2006 00:24 GMT	5
>From a regular pentagram with a circumcircle of unit radius, a prong is cut off, i.e. 1/5 of the pentagram's area is removed. From the remained region a conic surface is built. Determine the height of one of the four that way created 'bridges'. Best regards, Avni
Maple experts, who are they?	22 Jun 2006 01:53 GMT	18
A big Maple celebration is coming. Almost 25 years ago, Jan 1982, Maple 1.0 was released. To understand better the Maple evolution, here we reproduce the Maple experts list as it is given at the Prof Clark's
Conic section	21 Jun 2006 21:02 GMT	7
A cone with radius r = 1 and height h = 1 is intersected by a plane that passes through a diameter of the cone basis. Determine the angle between the plane and basis, if the intersection curve between the plane and cone hull after the cone hull rectification is a straight line.
Euler One	21 Jun 2006 16:05 GMT	1
I was just rereading William Dunham's "Euler - Master of Us All". Not as good as his wonderful "Journey Through Genius", but still a VERY interesting book. He points out Euler's solution(s) to find the value of
pde	21 Jun 2006 04:26 GMT	1
how to solve parabolic nonlinear pde: (dy/dt)= div(k.grad_z(u))+ grad_z(k) it is one dimension in space(z direction) and time. y is nolinear function of u.
Tube around the corner	20 Jun 2006 21:35 GMT	6
A corridor is 2m wide and has a corner of 90°. After the corner the corridor is 1.6m wide. Determine the maximum length of a tube with a diameter of 0.5m that can be transported horizontally around the corner. Best regards, Avni
Voronoi polygon	20 Jun 2006 08:44 GMT	2
1.what is voronoi polygon? 2.what is voronoi diagram? 3.what is the relation between vertices of voronoi polygon and
elevation	20 Jun 2006 04:23 GMT	3
Considering the curvature of the earth, what is the "observed" elevation and the elevation angle of a mountain peak (5,710' above sea level) seen from 851' above sea level, 47 miles away?
Very sudoku-like	18 Jun 2006 23:24 GMT	6
This is the most advanced SU-DO.KU-like game ever orchestrated in the history of man-kind! No-one denies it. http://web.gvdnet.dk/GVD002393/sudoku.htm