Show that the following systems are not models for the Incidence Axioms, that is, in each case determine which of the axioms are violated. (Note, if only one axiom is violated, then you have shown the independence of that axiom.) (a) Points: {1,2,3, 4, 5} Lines: {1,2, 3}, {1, 4}, {1,5}, {2,4}, {2, 5}, {3, 4}, {3,5}, {4, 5} Planes: {1,2, 3, 4}, {1, 2, 3, 5}, {1, 4, 5}, {2, 3, 4, 5} (b) Points: {1,2, 3, 4, 5} Lines: {1,2, 3}, {1, 4}, {1, 5}, {2, 4}, {2, 5}, {3, 4}, {3, 5}, {4, 5} Planes: {1,2,3, 4}, {1, 2, 3, 5}, {1, 2, 3}, {1,4, 5}, {2, 4, 5}, {3, 4, 5} (c) Points: {1,2,3, 4} Lines: {1,2, 4}, {1, 3}, {2, 3}, {3, 4} Planes: {1,2,3}, {1,3, 4}, {2, 3, 4}

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
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Chapter2: Second-order Linear Odes
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Show that the following systems are not models for the Incidence
Axioms, that is, in each case determine which of the axioms are violated.
(Note, if only one axiom is violated, then you have shown the
independence of that axiom.)
(a) Points: {1,2,3, 4, 5}
Lines: {1,2, 3}, {1, 4}, {1,5}, {2,4}, {2, 5}, {3, 4}, {3,5}, {4, 5}
Planes: {1,2, 3, 4}, {1, 2, 3, 5}, {1, 4, 5}, {2, 3, 4, 5}
(b) Points: {1,2, 3, 4, 5}
Lines: {1,2, 3}, {1, 4}, {1, 5}, {2, 4}, {2, 5}, {3, 4}, {3, 5}, {4, 5}
Planes: {1,2,3, 4}, {1, 2, 3, 5}, {1, 2, 3}, {1,4, 5}, {2, 4, 5}, {3, 4, 5}
(c) Points: {1,2,3, 4}
Lines: {1,2, 4}, {1, 3}, {2, 3}, {3, 4}
Planes: {1,2,3}, {1,3, 4}, {2, 3, 4}
Transcribed Image Text:Show that the following systems are not models for the Incidence Axioms, that is, in each case determine which of the axioms are violated. (Note, if only one axiom is violated, then you have shown the independence of that axiom.) (a) Points: {1,2,3, 4, 5} Lines: {1,2, 3}, {1, 4}, {1,5}, {2,4}, {2, 5}, {3, 4}, {3,5}, {4, 5} Planes: {1,2, 3, 4}, {1, 2, 3, 5}, {1, 4, 5}, {2, 3, 4, 5} (b) Points: {1,2, 3, 4, 5} Lines: {1,2, 3}, {1, 4}, {1, 5}, {2, 4}, {2, 5}, {3, 4}, {3, 5}, {4, 5} Planes: {1,2,3, 4}, {1, 2, 3, 5}, {1, 2, 3}, {1,4, 5}, {2, 4, 5}, {3, 4, 5} (c) Points: {1,2,3, 4} Lines: {1,2, 4}, {1, 3}, {2, 3}, {3, 4} Planes: {1,2,3}, {1,3, 4}, {2, 3, 4}
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