I never got beyond calculus in school, and I’ve heard this term thrown around by smart math and science people bit have no clue what it means or why it’s special.
In: Mathematics
The geometry of Euclid is flat. Parallel lines remain constant separation.
Classic counter example is spherical geometry. Longitude lines are parallel but meet at the poles. This can be a bit confusing because it’s possible to treat a sphere in uncurved space.
It takes a bit of imagination. Some people are so used to flat space geometry that anything else is unimaginable.
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