We exhibit an unambiguous k-DNF formula that requires CNF widthOmega~(k^{1.5) Our construction is inspired by the board game Hex and it isvastly simpler than previous ones . Our result is known to imply several other improved separations in query andcommunication complexity .

Author(s) : Shalev Ben-David, Mika Göös, Siddhartha Jain, Robin Kothari

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Keywords : hex - unambiguous - isvastly - complexity - andcommunication -

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