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Retraction of Software 2023, 2(3), 427-446.
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Retraction

RETRACTED: Stephenson, M.J. A Differential Datalog Interpreter. Software 2023, 2, 427–446

by
Matthew James Stephenson
Computer Science Department, Stanford University, Stanford, CA 94305-9045, USA
Software 2026, 5(1), 3; https://doi.org/10.3390/software5010003
Submission received: 26 November 2025 / Accepted: 12 December 2025 / Published: 21 January 2026
Versions Notes
The Journal retracts the article titled, “A Differential Datalog Interpreter” [1], cited above. This retraction notice supersedes and replaces the Expression of Concern published on 6 May 2024.
Following publication, concerns were brought to the publisher’s attention regarding an overlap with unpublished material produced by a different authorship group as well as concerns regarding the accuracy of the affiliation listed in the original publication [1].
In accordance with standard journal procedures, the Editorial Office and Editorial Board conducted an investigation that confirmed a significant overlap with the above-mentioned unpublished material, without appropriate acknowledgement. In addition and following communication with the relevant institution, the affiliation listed in the original publication was confirmed to be inaccurate. As a result, the independent Editorial Board has decided to retract this article as per MDPI’s retraction policy (https://www.mdpi.com/ethics#_bookmark30).
This retraction was approved by the Editor-in-Chief of the journal Software.
The author has been informed of this retraction and has indicated his disagreement with this decision.

Reference

  1. Stephenson, M.J. RETRACTED: A Differential Datalog Interpreter. Software 2023, 2, 427–446. [Google Scholar] [CrossRef]
Disclaimer/Publisher’s Note: The statements, opinions and data contained in all publications are solely those of the individual author(s) and contributor(s) and not of MDPI and/or the editor(s). MDPI and/or the editor(s) disclaim responsibility for any injury to people or property resulting from any ideas, methods, instructions or products referred to in the content.

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MDPI and ACS Style

Stephenson, M.J. RETRACTED: Stephenson, M.J. A Differential Datalog Interpreter. Software 2023, 2, 427–446. Software 2026, 5, 3. https://doi.org/10.3390/software5010003

AMA Style

Stephenson MJ. RETRACTED: Stephenson, M.J. A Differential Datalog Interpreter. Software 2023, 2, 427–446. Software. 2026; 5(1):3. https://doi.org/10.3390/software5010003

Chicago/Turabian Style

Stephenson, Matthew James. 2026. "RETRACTED: Stephenson, M.J. A Differential Datalog Interpreter. Software 2023, 2, 427–446" Software 5, no. 1: 3. https://doi.org/10.3390/software5010003

APA Style

Stephenson, M. J. (2026). RETRACTED: Stephenson, M.J. A Differential Datalog Interpreter. Software 2023, 2, 427–446. Software, 5(1), 3. https://doi.org/10.3390/software5010003

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