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  2. Jacobson ring - Wikipedia

    en.wikipedia.org/wiki/Jacobson_ring

    Any finitely generated algebra over a Jacobson ring is a Jacobson ring. In particular, any finitely generated algebra over a field or the integers, such as the coordinate ring of any affine algebraic set, is a Jacobson ring. A local ring has exactly one maximal ideal, so it is a Jacobson ring exactly when that maximal ideal is the only prime ideal.

  3. Jacobson radical - Wikipedia

    en.wikipedia.org/wiki/Jacobson_radical

    For a general ring with unity R, the Jacobson radical J(R) is defined as the ideal of all elements r ∈ R such that rM = 0 whenever M is a simple R-module.That is, = {=}. This is equivalent to the definition in the commutative case for a commutative ring R because the simple modules over a commutative ring are of the form R / for some maximal ideal of R, and the annihilators of R / in R are ...

  4. Jacobson density theorem - Wikipedia

    en.wikipedia.org/wiki/Jacobson_density_theorem

    In mathematics, more specifically non-commutative ring theory, modern algebra, and module theory, the Jacobson density theorem is a theorem concerning simple modules over a ring R. [1] The theorem can be applied to show that any primitive ring can be viewed as a "dense" subring of the ring of linear transformations of a vector space.

  5. Glossary of commutative algebra - Wikipedia

    en.wikipedia.org/.../Glossary_of_commutative_algebra

    2. A Jacobson ring is a ring such that every prime ideal is an intersection of maximal ideals. Japanese ring A Japanese ring (also called N-2 ring) is an integral domain R such that for every finite extension L of its quotient field K, the integral closure of R in L is a finitely generated R module.

  6. Zariski's lemma - Wikipedia

    en.wikipedia.org/wiki/Zariski's_lemma

    The lemma may also be understood from the following perspective. In general, a ring R is a Jacobson ring if and only if every finitely generated R-algebra that is a field is finite over R. [2] Thus, the lemma follows from the fact that a field is a Jacobson ring.

  7. Hilbert's Nullstellensatz - Wikipedia

    en.wikipedia.org/wiki/Hilbert's_Nullstellensatz

    Given Zariski's lemma, proving the Nullstellensatz amounts to showing that if k is a field, then every finitely generated k-algebra R (necessarily of the form = [,,] /) is Jacobson. More generally, one has the following theorem: Let be a Jacobson ring.

  8. Ring theory - Wikipedia

    en.wikipedia.org/wiki/Ring_theory

    In algebra, ring theory is the study of rings, ... The concept of the Jacobson radical of a ring; that is, the intersection of all right (left) ...

  9. Glossary of ring theory - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_ring_theory

    2. An ideal I of a ring R is semiprime if for any ideal A of R, A n ⊆ I implies A ⊆ I. Equivalently, I is semiprime if and only if R/I is a semiprime ring. semiprimitive A semiprimitive ring or Jacobson semisimple ring is a ring whose Jacobson radical is zero. Von Neumann regular rings and primitive rings are semiprimitive, however quasi ...

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