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A theorem for coloring a large class of “perfect” mathematical networks could ease the way for a long-sought general coloring proof.
Explore the deepest mysteries at the frontier of fundamental physics, and the most promising ideas put forth to solve them.
Solve this variation of Thomas Kirkman’s famous 1850 puzzle by arranging girls in walking groups. And think fast — the clock is ticking.
Imagine the fabric of space-time peeled back layer by layer.
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