nickponline
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 Jan 24 accepted What does multiplying by an orthogonal basis do? Jan 23 asked What does multiplying by an orthogonal basis do? Jan 2 accepted How can I count solutions to $x_1 + \ldots + x_n = N$? Dec 29 comment How can I count solutions to $x_1 + \ldots + x_n = N$? Thank you this is correct. Dec 29 comment How can I count solutions to $x_1 + \ldots + x_n = N$? Thank you this is correct. Dec 29 comment How can I count solutions to $x_1 + \ldots + x_n = N$? Thank you this is correct. Dec 29 revised How can I count solutions to $x_1 + \ldots + x_n = N$? added 95 characters in body Dec 29 comment How can I count solutions to $x_1 + \ldots + x_n = N$? I think I follow your logic @JackD'Aurizio I'm just trying to find the mistake in the last formula. Dec 29 comment How can I count solutions to $x_1 + \ldots + x_n = N$? For B = 6, N = 3, C = 2, K = 2 your solution gives -22 where as the correct answer is 16. I posted this is the question. Dec 29 comment How can I count solutions to $x_1 + \ldots + x_n = N$? This is interesting. Just give me a minute to work through it :) Dec 29 comment How can I count solutions to $x_1 + \ldots + x_n = N$? For B = 6, N = 3, C = 2, K = 2 your solution gives -20 where as the correct answer is 16. I posted this is the question. Also this is within the B-KC <= C so should not double count. Dec 29 revised How can I count solutions to $x_1 + \ldots + x_n = N$? Another example Dec 29 comment How can I count solutions to $x_1 + \ldots + x_n = N$? For B = 6, N = 3, C = 2, K = 2 your solution gives 18 where as the correct answer is 16. I posted this is the question. Also this is within the B-KC <= C so should not double count. Dec 29 revised How can I count solutions to $x_1 + \ldots + x_n = N$? Added good code Dec 29 revised How can I count solutions to $x_1 + \ldots + x_n = N$? added 1057 characters in body Dec 28 comment How can I count solutions to $x_1 + \ldots + x_n = N$? Ah i see sorry i though it was a subscript Dec 28 comment How can I count solutions to $x_1 + \ldots + x_n = N$? In my example C is 2 does this mean all the C_i are 2 as well? Dec 28 comment How can I count solutions to $x_1 + \ldots + x_n = N$? What are c_i values? Dec 28 comment How can I count solutions to $x_1 + \ldots + x_n = N$? Sure will check it now. I have some code for enumerating all the solutions Dec 28 comment How can I count solutions to $x_1 + \ldots + x_n = N$? Is there a way to exclude the double counted solutions by find an expression for them and subtracting it?