Johannes Gutenberg

Johannes Gensfleisch zur Laden zum Gutenberg was a German blacksmith, goldsmith, printer, and publisher who introduced printing to Europe. Wikipedia

Born: 1398, Mainz

Died: February 3, 1468, Mainz

Martin Luther

Luther in 1533 by Lucas Cranach the Elder

Born 10 November 1483

Eisleben, Saxony, Holy Roman Empire

Died 18 February 1546 (aged 62)

Eisleben, Saxony, Holy Roman Empire

Marin Mersenne

Born 8 September 1588

Oizé, Maine

Died 1 September 1648 (aged 59)

The printing press was invented in the Holy Roman Empire by the German Johannes Gutenberg around 1440

Luca Pacioli's "Summa de Arithmetica, Geometria, Proportioni et Proportionalità" (early Italian: "Review of Arithmetic, Geometry, Ratio and Proportion") was first printed and published in Venice in 1494

Liber Abaci (1202, also spelled as Liber Abbaci) is a historic book on arithmetic by Leonardo of Pisa, known later by his nickname Fibonacci. In this work, Fibonacci introduced to Europe the Hindu-Arabic numerals, a major element of our decimal system

n his 1489 treatise Johannes Widmann referred to the symbols − and + as minus and mer (Modern German mehr; "more"): "das − ist, das ist minus, und das + ist das mer"

In 1530, Niccolò Tartaglia (1500–1557) received two problems in cubic equations from Zuanne da Coi and announced that he could solve them.

The equals sign, equality sign, or "=" is a mathematical symbol used to indicate equality. It was invented in 1557 by Robert Recorde

he method of logarithms was publicly propounded by John Napier in 1614