Co-Compositeness (a game)
	This is a game for any number of players. Start with an n-by-n grid, where n is larger if there are more players. (I suggest an n of at least 16 if there are 2 players.) The first player to move places a 1 in any of the grid's squares. Players take turns placing numbers in the grid's squares as follows:... more » By Leroy Quet  - 2:55am - 1 new of 1 message

	Descarta2D (Exploring Analytic Geometry with Mathematica), Version 7
	The Mathematica add-on package, Descarta2D, has been certified to be compatible with Mathematica Version 7 (previously certified for Versions 3-6). The entire textbook "Exploring Analytic Geometry with Mathematica" (including the user manual for Descarta2D) is available for free viewing and download at [link] (both PDF and on-... more » By descart...@gmail.com  - 1:10am - 1 new of 1 message

	t.v.s
	Hi let g be a topological vector space . is it true that pi_2(g)=0. why ? By kupier  - 12:25am - 2 new of 2 messages

	obtaining a numerical evaluation of log(2) with mathematica
	Hi everyone, I would like to obtain the numerical value of, say, log(2) using mathematica. But when I write Ln[2], mathematica returns Ln[2]. I also tried the following without success. In[24]:= approximate[Ln[2]] Out[24]= approximate[Ln[2]] What should I do? I appreciate your help and pointers. By lydiajone...@aim.com  - 12:07am - 3 new of 3 messages

	Ring of Cartesian products A X B X C = Ring of Cartesian products (A X B) X C ????
	If R1 and R2 are (Boolean) rings, then I can show that the set of all finite, disjoint unions of Cartesian products A1 X A2, A1 in R1, A2 in R2, is a (Boolean) ring. Then by induction it is simple to show that if R1, ..., Rn are rings then the set of all finite, disjoint unions of Cartesian products... more » By sto  - Dec 1 - 1 new of 1 message

	consistency of arithmetic
	[link] Is this thing for real? Looks good to me , but I'm no expert . By dan.ms.ch...@gmail.com  - Dec 1 - 4 new of 4 messages

	Known integer sequence for series?
	Hi all, can someone tell me if there exists an integer sequence for the following series : I + x + 1/10*I*x^2 - 9/200*I*x^4 + 57/2000*I*x^6 - 1653/80000*I*x^8 + 64467/4000000*I*x^10 - 1052961/80000000*I*x^12 + 8874957/800000000*I*x^14 - 612372033/64000000000*I*x^16 + 5375265623/640000000000*I*x^18 - 478398640447/64000000000000*I* x^20 +... more » By Gerry  - Dec 1 - 4 new of 4 messages

	Yang Mills Paper, Draft of Complete Part I
	I have posted below, a current draft of the Yang Mills paper on which I am presently working: [link] This draft is complete, through the development and integration by parts of a full, Yang-Mills action. This is something of a breakpoint in my... more » By Jay R. Yablon  - Dec 1 - 1 new of 1 message

	``$me$ always changes" (A Poetic Force of Nature)
	Good day, The links below are just a page in length. [link] 32768 Bytes [link] fewer Bytes Your feedback, objective or otherwise, is welcomed. Enjo(y)... By mahipal7...@gmail.com  - Dec 1 - 2 new of 2 messages

	Covariant and Contravariant
	Hello, all, and while I understand the math behind and use of the above in vector analysis, I can't figure out why vector components are labeled as such. The fact that a vector in space can be represented in space in two ways (via the metric tensor) as either with "contravariant" components and one... more » By J. B. Wood  - Dec 1 - 3 new of 3 messages