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started a subdir for the book
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7
book/examples/chapter8/Geometryb.gf
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7
book/examples/chapter8/Geometryb.gf
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abstract Geometry = Logic ** {
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fun
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Line, Point, Circle : Dom ;
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Intersect, Parallel : Ind -> Ind -> Prop ;
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Vertical : Ind -> Prop ;
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Centre : Ind -> Ind ;
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}
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