Pascal's Triangle
A triangle of numbers in which a row represents the coefficients of the binomial series. The triangle is bordered by ones on the right and left sides, and each interior entry is the sum of the two entries above. Similar to modern day Sudoku.
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Blaise Pascal (1623 - 1662)
This unit of pressure/stress was named after French mathematician/physicist Blaise Pascal.
Just that: Blaise Pascal.
blaise pascal invented the calculator
Blaise Pascal invented the Pascaline, a type of calculater that was perfected when he was 30.