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Reals form a group under multiplication. Integers don't, but they do form a commutative ring (addition, negation, multiplication).
by profquail 17y ago
Reals form a group under multiplication. Integers don't, but they do form a commutative ring (addition, negation, multiplication).
- jibiki 17y ago> Reals form a group under multiplication. I think his point was that 0 has no inverse. So in the literal sense, the reals are not a group under multiplication (although obviously, when somebody says "the reals are a group under multiplication", one usually interprets it as "R\{0} is a group under multiplication".) This is vaguely relevant to the issue at hand because we are doing 0 to the 0.