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Retraction: A proof of the Collatz conjecture

The following article has been retracted from publication in International Journal of Mathematical Education in Science and Technology: Article title: A proof of the Collatz conjecture Authors: Paul S. Bruckman Journal: International Journal of Mathematical Education in Science and Technology Citation information: Paul S. Bruckman (2008) A proof of the Collatz conjecture, International Journal of Mathematical Education in Science and Technology, 39:3, 403-407 Version of Record Published Online: 27 March 2008 DOI: https://doi.org/10.1080/00207390701691574 We, the Editor-in-Chief and Publisher of International Journal of Mathematical Education in Science and Technology (IJMEST), have retracted the aforementioned classroom note. We are cognisant that the author attempted corrections elsewhere online since publishing this classroom note. The Editor-in-Chief reviewed the paper in light of these corrections and found that it contained results that could not be relied upon. As the findings in the classroom note are unreliable, we have proceeded with the retraction to notify the community following our investigations. We would further like to thank the reader who brought these concerns around the classroom note to our attention. The article will remain online to maintain the scholarly record, but it will be digitally watermarked on each page as “Retracted”.