Patching leaky tunnels in BWTs
Paola Bonizzoni, Davide Cozzi, Travis Gagie, Younan Gao, Ragnar Groot Koerkamp
Abstract
We extend Baier's foundationial work on tunnelling Burrows-Wheeler Transforms (BWTs) by showing how something that would be a good tunnel except for a strings that diverge from the tunnel (``leaks'') can be patched and turned into a tunnel. Whereas augmenting a BWT with a normal tunnel takes extra space proportional to the tunnels length, augmenting it with a patched tunnels take that plus space proportional to the number of leaks.
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