Studies of Euler diagrams/gap variants/medusa
gap variants |
medusa |
unchanged shape
[edit | edit source]kusiga (without spot 0)
[edit | edit source](gaps gray) | |
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(gaps 3D) |
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changed shape
[edit | edit source]nosafu (without spot 2)
[edit | edit source](gaps gray) | |
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(gaps 3D) |
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Euler diagram |
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rudege (without spots 0, 2)
[edit | edit source](gaps gray) | |
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(gaps 3D) | |
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with gapspot 11 | |
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One could easily get the impression, that the gapspot 11 is needed,
and that the graph is a prism based on the hexagon of foravo. | |
gapless | ||
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Set B can be represented by the outside of the green circle. This leads to a gapspot at the edge of the image, which can be removed, by moving it beyond the edge. | ||
ternary |
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as gap variant of serabe |
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Here the three-border crossing point is enlarged into an arbitrary gapspot. (This should be avoided. It is like a gapspot in the central triangle of foravo.) |
farofe (without spot 3)
[edit | edit source]Spot 3 is one of the octants of the 3-split ABC. Without it, it disappears.
(gaps gray) | |
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(gaps 3D) |
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Euler diagram | |
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vidita (without spots 1, 8, 9)
[edit | edit source](gaps gray) | |
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(gaps 3D) | ||
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Euler diagram | |
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niliko (without spots 2, 3)
[edit | edit source]Without these two adjacent spots, both 3-splits (ABC and BCD) lose their bottom front octant, and disappear. Only the six 2-splits are left.
(gaps gray) | |
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(gaps 3D) | |
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Euler diagram | |
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sapigi (without spots 0, 2, 4, 6)
[edit | edit source]Without these four adjacent spots, the 2-split AD loses its quadrant on the right. It disappears, and the two borders A and D are now parallel.
The only fullspot in the overlap of A and D is 9. But the 2-split BC requires four quadrants in each of the three AD regions.
The missing three quadrants besides 9 are the gapspots 11, 13 and 15. The shape is like that of barogi.
(gaps gray) | |
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(gaps 3D) | |||
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graph and Euler diagram | |
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