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See Also:
ring
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product of negative numbers
(Derivation)
by pahio
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Cross-references:
associativity
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inverse
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additive
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ring with unity
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This is
version 7
of
law of signs under multiplication in a ring
, born on 2004-03-09, modified 2006-03-10.
Object id is
5675
, canonical name is
XcdotYXcdotY
.
Accessed 3599 times total.
Classification:
AMS MSC
:
13-00
(Commutative rings and algebras :: General reference works )
16-00
(Associative rings and algebras :: General reference works )
20-00
(Group theory and generalizations :: General reference works )
Pending Errata and Addenda
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forum policy
prove needs prove
by
mj
on 2005-01-27 15:20:38
It seems to me that in this prove the part (-1)*(-a)=a needs to be prove dand I'm not sure if it is...
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Re: prove needs prove
by alozano
on 2005-01-27 16:02:57
(-x).(-y)=x.y
by
perucho
on 2004-08-05 03:04:52
Also the additive inverse of (-1) is 1.
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entry title
by
drini
on 2004-03-09 13:50:53
shouldn't this be better titled "law of signs" or some other common phrasing?
f
G -----> H G
p \ /_ ----- ~ f(G)
\ / f ker f
G/ker f
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Re: entry title
by alozano
on 2004-03-09 14:12:24
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