> On 09 Apr 2014, at 23:42, Kevin Ballard <ke...@sb.org> wrote: > > The number 0 is the additive identity for numbers. But informally, the > additive identity for other things can be called "zero" without problem.
Ok, so it seems. From http://en.m.wikipedia.org/wiki/Identity_(mathematics) The number 0 is the additive identity (identity element for the binary operation of addition) for integers, real numbers, and complex numbers. For every number a, including 0 itself, In a more general context, when a binary operation is denoted with + and has an identity, this identity is commonly denoted by the symbol 0 (zero) and called an additive identity.
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