Proof confirms the desarguesian property of pappian affine planes, highlighting an omitted case in original work.
We present a complete proof of the classical Heisenberg’s Theorem on the Desarguesian property of Pappian affine planes. In the proof we consider two cases, one of which was omitted in the original Hessenberg’s proof, making it incomplete.
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V. O. Pshyk (2025) studied this question.
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