All finite numbers are sandwitched between zero and infinity. What about zero ? Is it a finite number ? Let us analyse. Zero is not well defined. If we define zero as reciprocal of infinity, then since infinity has no finite value, zero can not have one finite value it will have several values. That is the reason, like infinity ,Zero does not obey the rules of finite numbers. Thus Zero is like white colour which is mixture of infinite monochromatic colours. Similarly Infinity (absence of finite numbers) is like black colour which is nothing but absence of colours. This concludes that ZERO is not a finite no. Pls comment. P.J.LAKHAPATE plakhapate@rediffmail.com

the question leads to the question.... to what decimal point do we count zero? and what are the units in question? -MT

Plakhapate: Cute joke!! Since white is the combination of all colors (or at least of many colors) and black is the absence of color, it is obvious that infinity corresponds to white and zero corresponds to black, assuming that infinity & zero can be represented by colors at all. Your reversed match-up is an obvious joke. You left another clue for those who did not get it right away. Everybody knows that zero is more easily defined than infinity. Yet you define zero as the reciprocal of infinity. Even cuter that the reversed match-up of white/black corresponding to zero/infinity. Apparently nobody else realizes that you are being humorous.

Zero can be defined like this: 1. For any number x: 0 + x = x + 0 = x. and/or 2. For any finite number x: 0x = x0 = 0. Zero is what is known as the "additive identity", in that it leaves a number unchanged when added to it.

Couple of thoughts for you... Numbers aren't "like" colors at all; numbers are actually abstract and purely imaginary, colors are wavelengths of luminous radiation and objectively real. Zero is well defined, multiple ways (as James and Dale and others can point out); remember, sets are the basis of all computation. Infinity is also well defined, and no actual ones exist. ... If you're going to make a case for zero not being a valid value, you'll have to do so with axioms which do not violate existing laws of mathematics, or equivocate either the quantity of an 'infinity' with the quality of (being) infinite, or transpose the properties of an empty set onto a nonexistent (or invalid) set. Good luck =)

if adding colours ie lighting then white is all however when subtracting wavelegnths ie dye's or paint then white is zero and black is all colours of paint mixed.

Darcy Emes: You are correct. However, it is my understanding that subtractive colors are assumed in the context of an artist using a palette to create an oil or water color painting, while in the context of physics, additive colors are assumed. As far as I know, only artists work with subtractive colors. Photographers work with subtractive colors.