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<p>or graphs, analogous to connectivity of lattice components in the filtration problem that modulates capacity for percolation.</p>

<p><big>Background</big></p>
<p><big> Origins </big></p>
<p>In Western Europe, percolation was a process formally invented in the early nineteenth century, particularly in researching methods of extraction for apothecary and pharmaceutical substances. Important contributions were made by <a href="page.php?w=J%C3%B6ns_Jacob_Berzelius">Jöns Jacob Berzelius</a>, the <a href="page.php?w=Counts_of_Real">Count of Real</a>, <a href="page.php?w=Pierre-Fran%C3%A7ois-Guillaume_Boullay">Pierre-François-Guillaume Boullay</a>,</p><p>
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