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Mathematics, 14.09.2019 03:30 michaela134

Consider adding to the incidence axioms another that says "axiom4: every line contains exactly three distinct points." we know that fano's geometry (p. 18) satisfies this set of axioms. explain carefully using only the 4 axioms why there must be at least 7 points and at least 7 lines in order for a geometry to satisfy these 4 axioms.

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