Mousepad - pi representations

Pi is arguably the most important transcendental number known to man. Defined as the ratio of the circumference of a circle to its diameter, this number has fascinated mankind since antiquity and continues to delight mathematicians with intrigue to this day. Over time this number has slowly yielded its secrets. First, it is an irrational number and cannot be represented as the ratio of two integers. Beyond that, it is transcendental and cannot represent the root of any polynomial with rational coefficients. Open questions remain. Celebrate the wonder of mathematics on National Pi Day. This attractive mousepad has many different formulae featuring pi. The most famous is Euler's formula, the magical relationship that combines two transcendental numbers with the imaginary unit modulus to produce an integer. There are both series and integral representations for pi. You will see Machin's formula, the Riemann Zeta function, the Madhava-Liebnitz series, the BPP formula and many others. This is an ideal gift for your favourite polymath. The design is open allowing you to change bottle size and colours or to customise this bottle with a name.