 Reviews of Modern Physics, 2011%DIFDELCMD < ]%%% , this strategy optimally finds sparse targets of any size and shape.
<clarity>  Reviews of Modern Physics, 2011%DIFDELCMD < ]%%% , this strategy optimally finds sparse targets of any size and shape.
 Reviews of Modern Physics, 2011%DIFDELCMD < ]%%% walk strategy is extremely efficient at finding sparse targets of any size and shape.