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BP238 C-like curves point to the same direction vs. c-like curves point to opposite directions.
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CROSSREFS

Adjacent-numbered pages:
BP233 BP234 BP235 BP236 BP237  *  BP239 BP240 BP241 BP242 BP243

KEYWORD

unorderedpair, traditional

CONCEPT tangent (info | search),
line_absolute_direction (info | search),
absolute_direction (info | search),
imagined_line_or_curve (info | search),
imagined_entity (info | search),
same_feature (info | search),
same (info | search),
direction (info | search)

AUTHOR

Harry E. Foundalis

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