3 ms·
Borsuk-Ulam applies to surfaces homeomorphic to a sphere, but the picture shows that the earth's surface is a sphere with at least one handle, a donut with at l
by ruuda 5y ago
Borsuk-Ulam applies to surfaces homeomorphic to a sphere, but the picture shows that the earth's surface is a sphere with at least one handle, a donut with at least one hole.