PUN

“When the tide goes out, you can tell who was skinny dipping.” can be taken to be an understatement in two senses.
keywords: money, finance, clothing

Turán’s brick-factory problem

Here is the link to the Wikipedia article on it.
keywords: Turán’s brick factory problem, Zarankiewicz crossing-number conjecture, Zarankiewicz crossing number conjecture, 3 2’s in the denominator, 2 in the denominator 3 times, minimum number of crossings in a drawing of a complete bipartite graph, drawing method, some special cases solved, symmetry, 83%, eighty three percent, upper bound, lower bounds, Graph Drawing, train, Paul Turan, Pál Turán, Turán Pál