1526 – Rafael Bombelli was born in Bologna.
– He is the author of a treatise on algebra.
– He was the one who managed to settle the problem with imaginary numbers.
1569 – In Algebra, he solved equations, using the method of del Ferro/Tartaglia, he introduced +i and -i.
– The lunar crater Bombelli is named after him
1572 – Bombelli Rafael died.