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3 Questions

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Spectrum of primitive nonnegative integer matrices

nt.number-theory matrices algebraic-number-theory nonnegative-matrices

Jul 14 '17 at 22:16 Community♦ 1

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Cutting a rectangle into an odd number of congruent pieces

co.combinatorics discrete-geometry

Sep 25 '17 at 22:25 Community♦ 1

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6

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How to partition R^3 into pairwise non-parallel lines?

gn.general-topology mg.metric-geometry fibre-bundles hopf-fibration

Aug 17 at 5:26 Martin Sleziak 4,267

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