Percolation theory: about math and gossip
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Percolation theory is a branch of mathematics at the interface between probability theory and graph theory. The term 'percolation' originates from materials science. A representative question is as follows. Suppose some liquid is poured over a porous material. Will the liquid be able to make its way from hole to hole and reach the bottom?
Shreds of memories of Paul Erdős
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In mathematics it is almost impossible not to encounter the name of Paul Erdős. Much of his work centered around discrete mathematics, cracking many previously unsolved problems in the field.