4 ms·
Reading the Wikipedia entry about Hilbert's axioms [1], I think spherical geometry is not absolute, because two opposing points lie on many lines connecting the
by red_trumpet 5y ago
Reading the Wikipedia entry about Hilbert's axioms [1], I think spherical geometry is not absolute, because two opposing points lie on many lines connecting the two (think north and south pole, connected by all the meridians).
[1] https://en.wikipedia.org/wiki/Hilbert%27s_axioms https://en.wikipedia.org/wiki/Hilbert%27s_axioms