Negative Numbers

A page of the Numeropedia - the Special Encyclopedia of Numbers

All Numbers  & [0-9] 0 - 1  - 2 - 3 - 4 - 5 - 6 - 7 - 8 - 9  &  [...<0]  - [0<...<1]

1  - 10 - 100  - 1000 - 10,000 - 100,000 - 1M - 10M - 100M1B10B - 100B - 1T - 10T - 100T - 1Q - ...

00          None/Never         Number 0         Number 0 in Math.

-459.67 & -273.15

[Science]  The “absolute zero” degree, the coldest possible temperature, at which all random molecular motions cease: –273.15 oC (Celsius or centigrade) = 0 K (Kelvin) = -459.67 oF (Fahrenheit).  Kelvin (a unit of thermodynamic temperature, named after Lord Kelvin, the Scottish mathematician and physicist William Thomson) is the fraction (1/273.16) of the thermodynamic temperature of the triple point of water, where water forms an interface of 3 phases: solid, liquid and vapor.

-40

[Science]  The temperature at which the degrees in Celsius (or centigrade) and in Fahrenheit are exactly the same: -40 oC = -40 oF.

-24

[Science]  Prefix: Yocto- = 10-24 = 1/1,000,000,000,000,000,000,000,000.

-21

[Science]  Prefix: Zepto- = 10-21 = /1,000,000,000,000,000,000,000.

-18

[Science]  Prefix: Atto- = 10-18 = /1,000,000,000,000,000,000.

-17

[Science]  The lowest temperature that the German scientist Gabriel Daniel Fahrenheit could obtain by mixing salt and ice: -17.78 oC = 0 oF.

-15

[Science]  Prefix: Femto- = 10-15 = 1/1,000,000,000,000,000. A femtometer is called a Fermi (in honor of the Italian/U.S. physicist Enrico Fermi).

-12

[Science]  Prefix: Pico- = 10-12 = 1/1,000,000,000,000.

-10

[Science]  1 Ångström = 10-10 m = 1/10,000,000,000 m (meter).

–9

[Science]  Prefix: Nano- = 10-9 = 1/1,000,000,000.

-6

[Science]  Prefix: Micro- = 10-6 = 1/1,000,000.

-5...

-4

[Sport]  The maximal score made for a hole in golf, only in the extremely rare situation: hole-in-one of a par-5 hole, called a condor or triple-eagle.

-3

[Science]  Prefix: Milli- = 10-3 = 1/1,000.

[Sport]  The score of a double-eagle (albatross) made for a hole in a game of golf.

-2

[EECS]  The exponent of 10 represented by the silver color of the 3rd band (i.e. multiplier is 10-2) in the electronic resistor/capacitor color code.

[Science]  Prefix: Centi- = 10-2 = 1/100.

[Sport]  The score of an eagle made for a hole in a game of golf.

-1

[EECS]  The exponent of 10 represented by the gold color of the 3rd band (i.e. multiplier is 10-1) in the electronic resistor/capacitor color code.

[Math.]  Inverse (or reciprocal) of a number a is a-1 = 1/a.

Inverse of a function f(x) is f -1, such that: f -1(f(x)) = f(f -1(x)) = x.

[Math.]  Square of i: -1 = i2 or i = (-1)1/2, where the symbol i is the imaginary unit, introduced by the Swiss mathematician Leonhard Euler in 1777.

The formula eip = -1 is one of the most amazing mathematical formulae, discovered by the Swiss mathematician Leonhard Euler, involves 3 special numbers: the transcendental Euler's number (e = 2.718281828…, the base of the natural logarithm, also known as Napier's constant), the transcendental number pi (p = 3.141592654…, the ratio of a circle’s circumference to its diameter) and an imaginary number i = (-1)1/2 together with a negative integer (-1 = i2).

[Science]  Prefix: Deci- = 10-1 = 1/10.

[Sport]  The score of a birdie made for a hole in a game of golf.

-0.5

[Math.]  The value of some basic mathematical functions:

sin(210o) = sin(330o) and cos(120o) = cos(240o)

Negative Values

[Math.]  Euler numbers (or secant numbers Ei) are defined by the infinite series: sec(x) = 1/cos(x) = 1+E2(x2/2!)+E4(x4/4!)+E6(x6/6!)+…, where E0 = 1, E2 = -1, E4 = 5, E6 =  -61, E8 = 1,385, E10 = -50,521, E12 = 2,702,765, E14 = -199,360,981, E16 = 19,391,512,145, E18 = -2,404,879,675,441… The odd-indexed Euler numbers are all 0. The even-indexed Euler numbers have alternating signs.

[Movie]  Name of TV show/series or movie: “Less Than Zero”.