A  Science and Technology Odyssey in Cyberspace-Time 
20000 BC to 1800 AD
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Time Period

Title Page



1500 - 1699

1700 - 1800



Back to Timeline 1500 thru 1699 

Negative Numbers

"Geronimo Cardano (1501-1576) writes Ars magna and uses solutions to polynomials which lead to square roots of negative quantities, but calls them "sophistic" and concludes that they it is "as subtle as it is useless." (This work is often taken to mark the beginning of the modern period of mathematics.)" Quote from site

Actually the concept of negative numbers as a solution of quadratic equations were considered as early as 665 AD. Click site below to see entire timeline.

History of Negative and Imaginary Numbers







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