A new family of counterexamples to the Zariski Cancellation Problem in positive characteristic

In this paper, we exhibit a new infinite family of counterexamples to the Zariski Cancellation Problem over a field of positive characteristic, in higher dimensions ( <inline-formula content-type="math/mathml"> <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" alttext="greater-than-or-slanted-equals 3"> <mml:semantics> <mml:mrow> <mml:mo> ⩾ </mml:mo> <mml:mn>3</mml:mn> </mml:mrow> <mml:annotation encoding="application/x-tex">\geqslant 3</mml:annotation> </mml:semantics> </mml:math> </inline-formula> ), which are pairwise non-isomorphic and also non-isomorphic to the existing family of counterexamples, demonstrated by Gupta in [Adv. Math. 264 (2014), pp. 296–307].

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Journal
Proceedings of the American Mathematical Society
Published
2026-01-15
DOI
https://doi.org/10.1090/proc/17539
Primary Topic
Advanced Differential Equations and Dynamical Systems
Type
article
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article

A new family of counterexamples to the Zariski Cancellation Problem in positive characteristic

Parnashree Ghosh, Ananya Pal
Proceedings of the American Mathematical Society
Advanced Differential Equations and Dynamical Systems
article

A new family of counterexamples to the Zariski Cancellation Problem in positive characteristic

Parnashree Ghosh, Ananya Pal
article en

Abstract

In this paper, we exhibit a new infinite family of counterexamples to the Zariski Cancellation Problem over a field of positive characteristic, in higher dimensions ( <inline-formula content-type="math/mathml"> <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" alttext="greater-than-or-slanted-equals 3"> <mml:semantics> <mml:mrow> <mml:mo> ⩾ </mml:mo> <mml:mn>3</mml:mn> </mml:mrow> <mml:annotation encoding="application/x-tex">\geqslant 3</mml:annotation> </mml:semantics> </mml:math> </inline-formula> ), which are pairwise non-isomorphic and also non-isomorphic to the existing family of counterexamples, demonstrated by Gupta in [Adv. Math. 264 (2014), pp. 296–307].

Proceedings of the American Mathematical SocietyVol. 154(3)
National Research University Higher School of Economics (RU), Tata Institute of Fundamental Research (IN)
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Advanced Differential Equations and Dynamical Systems
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A new family of counterexamples to the Zariski Cancellation Problem in positive characteristic — Parnashree Ghosh, Ananya Pal · Proceedings of the American Mathematical Society (2026) | TGRS Research Map | TGRS