Re: [math-fun] term for f(a b) = a f(b) + b f(a)?
16 Jun
2007
16 Jun
'07
8:59 p.m.
Marc asked: Is there term for when f(a b) = a f(b) + b f(a)? If not, what would you suggest? This is called a "derivation" and is better written f(a b) = a f(b) + f(a) b See e.g. Bourbaki, Lie Groups, Vol 1 , Chap 1, section 1, para 1, page 2 ! Neil
17 Jun
17 Jun
12:43 a.m.
New subject: [math-fun] term for f(a b) = a f(b) + b f(a)?
"N. J. A. Sloane" <njas@research.att.com> wrote:
Marc asked:
Is there term for when f(a b) = a f(b) + b f(a)?
This is called a "derivation" and is better written
f(a b) = a f(b) + f(a) b
See e.g. Bourbaki, Lie Groups, Vol 1 , Chap 1, section 1, para 1, page 2 !
A derivation must also be linear (by definition). --Bill Dubuque
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