The origin of the mathematical symbol π (pi) and Σ (Sigma)

One, π (pi)

March marks Pi Day, the holiday commemorating the mathematical constantπ (PI), written numerically as 3.141592+. Since mathematic notation is a language this uses symbols from a multitude of alphabets and typefaces, it seems only Fitti Ng that this sixteenth letter of the Greek alphabet get a little attention.

March 14 is the Pi Festival , which honors the mathematical constant π (pi), which is mathematically equal to the number of 3.141592+ .

The Latin name of the Greek letterπis Pi, pronounced pie. The first recorded use of the letter as a mathematical symbol comes from the Welsh mathematician Williams Jones in a 1706 W Ork called Synopsis Palmariorum in which he abbreviated periphery or its Greek ancestor περι ? ? Shing , meaning "circumference," toπ.

Greek (Greece) the letter π in the Latin (Latin) relay was written as Pi, pronounced like pie (PIE). For the first time, William Jones, a Welsh (Welsh) mathematician, was used in the 1706Synopsis PalmariorumBook, in which William Jones will Periphery or its Greek etymology περι? ? Shing (refers to ' circumference ' " perimeter ") abbreviated to π.

The Mathematical pi is defined as the ratio of the circumference of a circle to its diameter. As an irrational number, the PI can never repeat when written in decimals; Computers has calculated pi to decimal places in the trillions. It is also a transcendental number, a concept that exceeds the capacity of this post to explain.

The mathematical pi is defined as the circumference of the circle and its diameter ratio. As a irrationalnumber (irrational numbers cannot be represented as fractions of two integers), pi is not duplicated (no loops) if it is recorded in decimal.

Memorizing as many digits of pi as possible is a obsession for some. The Guinness world Record for memorizing digits Ofπis held by a man named Lu Chao. He set the record in November 2005 at Northwest A&f University in the Shaanxi Province of China. It took him hours and 4 minutes to recite the 67,890th decimal place ofπwithout a mistake.

1. Reference: What ' s the Origin of the Word "Pi"?

Second, Σ (capital Sigma)

Σ (Sigma) is the upper case letter S in Greek. and S stands for Sum (and).

Reference: Sigma Notation

Three, μ (MU)

μ (Mu) is mean (mean, average).

Iv. Σ (Sigma)

Five

∏ (capital Pi)

Product -product of all values in range of series (product of a series of books) ∏ xi=x1? x2?...? xN.

The origin of the mathematical symbol π (pi) and Σ (Sigma)