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Definition ideal

Etymology

From French idéal, from Late Latin ide?lis (“existing in idea”), from Latin idea (“idea”); see idea. In mathematics, the noun ring theory sense was first introduced by German mathematician Richard Dedekind in his 1871 edition of a text on number theory. The concept was quickly expanded to ring theory and later generalised to order theory. The set theory and Lie theory senses can be regarded as applications of the order theory sense.

Adjective

ideal (comparative more ideal, superlative most ideal)

  1. Optimal; being the best possibility.
  2. Perfect, flawless, having no defects.
  3. Pertaining to ideas, or to a given idea.
  4. Existing only in the mind; conceptual, imaginary.
  5. Teaching or relating to the doctrine of idealism.
  6. (mathematics) Not actually present, but considered as present when limits at infinity are included.

Noun

ideal (plural ideals)

  1. A perfect standard of beauty, intellect etc., or a standard of excellence to aim at.
  2. (algebra, ring theory) A subring closed under multiplication by its containing ring.
  3. (algebra, order theory, lattice theory) A non-empty lower set (of a partially ordered set) which is closed under binary suprema (a.k.a. joins).
  4. (set theory) A collection of sets, considered small or negligible, such that every subset of each member and the union of any two members are also members of the collection.
  5. (algebra, Lie theory) A Lie subalgebra (subspace that is closed under the Lie bracket) ? of a given Lie algebra ? such that the Lie bracket [?,?] is a subset of ?.

Results 490 Words with the letters IDEAL

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8 letter words with the letters IDEAL 
7 letter words with the letters IDEAL 
6 letter words with the letters IDEAL 
5 letter words with the letters IDEAL 
4 letter words with the letters IDEAL 
AIDE 5
DALE 6
DEAL 6
DEIL 6
DELI 6
DIAL 6
DIEL 6
IDEA 5
IDLE 6
ILEA 5
LADE 6
LAID 6
LEAD 6
LIED 6
3 letter words with the letters IDEAL 
AID 4
AIL 4
ALE 4
DAL 5
DEL 5
DIE 4
ELD 5
LAD 5
LEA 4
LED 5
LEI 4
LID 5
LIE 4
2 letter words with the letters IDEAL 
AD 3
AE 2
AI 2
AL 3
DA 3
DE 3
DI 3
ED 3
EL 3
ID 3
LA 3
LI 3

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