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Given show that the imaginary part of the infinite series is
Being an infinite geometric series of common ration I expect I should evaluate but no avail so far.--
220.253.98.30 (
talk) 08:52, 11 August 2010 (UTC)
In the article Duality (order theory) it says that in the dual poset, meet becomes join and join becomes meet. While this seems intutively okay, what is a mathematical proof of this fact. Thanks- Shahab ( talk) 16:50, 11 August 2010 (UTC)
How many possible combinations are there of the pieces of a Happy Cube to form a six-piece cube? I'm guessing that there are 122,880 (20*16*12*8*4), as there are 20 places to put the second piece, 16 places to put the third, etc. If this is correct, what is a better way to express this? I've never been very good with permutations/combinations. Other questions I'm thinking about include how the answer changes if you consider each side of a piece as distinct and how to tell how many solutions exist. Mannerisky ( talk) 20:56, 11 August 2010 (UTC)
Mathematics desk | ||
---|---|---|
< August 10 | << Jul | August | Sep >> | August 12 > |
Welcome to the Wikipedia Mathematics Reference Desk Archives |
---|
The page you are currently viewing is an archive page. While you can leave answers for any questions shown below, please ask new questions on one of the current reference desk pages. |
Given show that the imaginary part of the infinite series is
Being an infinite geometric series of common ration I expect I should evaluate but no avail so far.--
220.253.98.30 (
talk) 08:52, 11 August 2010 (UTC)
In the article Duality (order theory) it says that in the dual poset, meet becomes join and join becomes meet. While this seems intutively okay, what is a mathematical proof of this fact. Thanks- Shahab ( talk) 16:50, 11 August 2010 (UTC)
How many possible combinations are there of the pieces of a Happy Cube to form a six-piece cube? I'm guessing that there are 122,880 (20*16*12*8*4), as there are 20 places to put the second piece, 16 places to put the third, etc. If this is correct, what is a better way to express this? I've never been very good with permutations/combinations. Other questions I'm thinking about include how the answer changes if you consider each side of a piece as distinct and how to tell how many solutions exist. Mannerisky ( talk) 20:56, 11 August 2010 (UTC)