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Conjecture

Dixmier Conjecture

Algebra

The Dixmier conjecture, stated by Jacques Dixmier in 1968, originally asked whether any endomorphism of the first Weyl algebra over a field of characteristic zero is an automorphism. This description is adapted from Wikipedia contributors under CC BY-SA 4.0; changes were made. https://creativecommons.org/licenses/by-sa/4.0/

Facts
Statement
Every endomorphism of the n-th Weyl algebra over a field of characteristic zero is an automorphism; Dixmier originally asked this for the first Weyl algebra. 1
Proposed Year
1968 1
Progress Toward Resolution
Stably equivalent to the Jacobian conjecture. Since a counterexample to the Jacobian conjecture in three variables was found in July 2026, the Dixmier conjecture is false for the n-th Weyl algebra for every n of at least 3. It remains open for the first and second Weyl algebras, since the Jacobian conjecture is still open in two variables. 1
Classification
Resolution Status
Open 1
Prize Status
Prize Status (category)
No Prize Offered 1
Sources
1. Dixmier Conjecture (Wikipedia)
Wikimedia Foundation
  • Lead section
    stated by Jacques Dixmier in 1968
  • Lead section, statement sentence
    originally asked whether any endomorphism of the first Weyl algebra
  • Current status paragraph
    The conjecture remains open for the first and second Weyl algebras, since the Jacobian conjecture is still open in two variables
  • Generalization section
    The analogous statement for the n-th Weyl algebra
  • Equivalence with the Jacobian conjecture paragraph
    showed that the Dixmier conjecture is stably equivalent to the Jacobian conjecture
  • Recent developments paragraph
    In July 2026, a counterexample to the Jacobian conjecture in three variables was found
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