algebraically independent
التعريفات والمعاني
== English ==
=== Adjective ===
algebraically independent (not comparable)
(algebra, field theory) (Of a subset S of the extension field L of a given field extension L / K) whose elements do not satisfy any non-trivial polynomial equation with coefficients in K.
1999, David Mumford, The Red Book of Varieties and Schemes: Includes the Michigan Lectures, Springer, Lecture Notes in Mathematics 1358, 2nd Edition, Expanded, page 40,
If the statement is false, there are
n
{\displaystyle n}
elements
x
1
,
…
,
x
n
{\displaystyle x_{1},\dots ,x_{n}}
in
R
{\displaystyle R}
such that their images
x
¯
i
{\displaystyle {\overline {x}}_{i}}
in
R
/
P
{\displaystyle R/P}
are algebraically independent. Let
0
≠
p
∈
P
{\displaystyle 0\neq p\in P}
. Then
p
,
x
1
,
…
x
n
{\displaystyle p,x_{1},\dots \,x_{n}}
cannot be algebraically independent over
k
{\displaystyle k}
, so there is a polynomial
P
(
Y
,
X
,
…
,
X
n
)
{\displaystyle P(Y,X_{,}\dots ,X_{n})}
over
k
{\displaystyle k}
such that
P
(
p
,
x
,
…
,
x
n
)
=
0
{\displaystyle P(p,x_{,}\dots ,x_{n})=0}
.
2014, M. Ram Murty, Purusottam Rath, Transcendental Numbers, Springer, page 138,
Let us begin with the following conjecture of Schneider:
If
α
≠
0
,
1
{\displaystyle \alpha \neq 0,1}
is algebraic and
β
{\displaystyle \beta }
is an algebraic irrational of degree
d
≥
2
{\displaystyle d\geq 2}
, then
α
β
,
…
,
α
β
d
−
1
{\displaystyle \alpha ^{\beta },\dots ,\alpha ^{\beta ^{d-1}}}
are algebraically independent.
==== Usage notes ====
Perhaps unexpectedly, a single element of
S
{\displaystyle S}
may be said to be algebraically independent (over
K
{\displaystyle K}
).
==== Antonyms ====
(antonym(s) of “which does not or whose elements do not satisfy any nontrivial polynomial equation over a given field”): algebraically dependent
==== Translations ====
=== Further reading ===
Algebraic independence on Wikipedia.Wikipedia
Algebraic independence on Encyclopedia of Mathematics
Algebraically Independent on Wolfram MathWorld