Keyword | CPC | PCC | Volume | Score | Length of keyword |
---|---|---|---|---|---|

sigma | 1.51 | 0.6 | 2660 | 33 | 5 |

The first use of the sigma symbol was by the Swiss mathematician Leonhard Euler in 1755. He used it to describe the sum of a series of numbers. Today, the sigma symbol is used in many branches of mathematics, including algebra, geometry, and calculus. The Small Letter Sigma Symbol is the Modern Greek alphabet’s 18th letter.

‘Sigma male’ might not be a term that you recognize, but you’re pretty likely to recognize the characteristics of one – either in a friend or in yourself! Most of us make snap judgements about alpha males (arrogant and extroverted) and beta males (shy and introverted), even though these are not always accurate.

The SIGMA I series features full-frame compatible lenses that offer new value to mirrorless systems. The combination of superb optical performance with a level of compactness that is perfectly suited to smaller and lighter modern mirrorless cameras will bring you new opportunities for a perfect shot.

The world insurance sigma covers premiums written in the global primary insurance industry. Published annually, it has become one of the fixtures of the sigma programme since 1968, the publication's inaugural year.