
doi: 10.3390/sym13081382
The Theorems of Pappus and Desargues (for the projective plane over a field) are generalized here by two identities involving determinants and cross products. These identities are proved to hold in the three-dimensional vector space over a field. They are closely related to the Arguesian identity in lattice theory and to Cayley-Grassmann identities in invariant theory.
projective plane over a field, Desargues theorem, Pappus theorem
projective plane over a field, Desargues theorem, Pappus theorem
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