Talk:Railway circuit: Difference between revisions
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--[[User:G.Brougnard|G.Brougnard]] ([[User talk:G.Brougnard|talk]]) 08:33, 5 April 2016 (UTC)
: Thank you. I didn't have the two first ones, with the overlapping tracks. So now I do have 35 for C24 based on i + 6 symmetry. I've found 5 additional solutions, however, based on a 3-way symmetry of i + 4. They look valid to me, unless I've misunderstood the criteria:
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::: Why eliminate a mirror image if it is not identical to its other-handed version? --[[User:Wherrera|Wherrera]] ([[User talk:Wherrera|talk]]) 17:17, 5 July 2022 (UTC)
:::: Because the task specifically requires it: "Duplicates, either by symmetry, translation, '''reflexion,''' or rotation must be eliminated." --[[User:Katzenbaer|Katzenbaer]] ([[User talk:Katzenbaer|talk]]) 21:50, 5 July 2022 (UTC)
::::: Interesting. I would usually say that this is a duplicate by reflection:
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::::: but this is not:
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because the two are different on the plane (not in 3D). I wonder what the task author meant.
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