Not possible, summing an infinite series would take infinite time.
SDS Sigma series was created in 1965.
Sigma naught = 1 / (mu naught * c^2)
Hasbro manufactured a series of military style figures called the Sigma 6 series. Included in this series was the figure G. I. Joe. The figures in the Sigma 6 series stood approximately 8" tall and were articulated.
-3 x -3
In theory, there are infinite sigmas beyond six sigma. In reality, the cost and ability to move from six to seven sigma in a business process is usually not worth the return. At a six sigma quality level, you would expect 3.4 defects per million. At seven sigma quality, you would have 0.007 defects per million. There are some processes that may run at seven sigma quality, but six sigma is a better goal which the vast majorities of businesses will never manage to reach.
Pattern recognition
No
All the NBA series of games, Naruto" Ultimate Ninja Storm, Nascar 08 & 09, NCAA football and basketball series, Need for speed series, NHL series, and Ninja Gaiden Sigma & Ninja Gaiden Sigma 2.
No. The basic idea of proving why not is this: 1) The underlying space X is at least countably infinite (of course). 2) Use the properties of a sigma field (aka sigma algebra) to find a countable partition of the space, X = disjiont-union( X_i ). 3) Notice that the union(X_i, s in S) is in the sigma algebra for any subset S of natural numbers. 4) Notice that any union(X_i, s in S) is distinct. 5) Conclude, since the set of subsets of natural numbers is uncountable, so too is your sigma algebra.
25-200 USD or so
Sigma Sigma Sigma was created on 1898-04-20.
Sigma Sigma Rho was created in 1998.