The invention of the decimal point dates back to 1440 at the latest.

The Decimal Revolution: How Giovanni Bianchini’s Use of Trigonometry Paved the Way for Modern Mathematics”.

Trigonometric tables were a crucial element in the work of Giovanni Bianchini, a Venetian merchant and mathematician who made significant advancements in the field of mathematics. Bianchini’s use of decimal numbers was groundbreaking, as he developed a system that was much easier to work with than the Babylonian system used by Europeans at the time.

Bianchini’s introduction of the decimal point in 1440 marked a turning point in mathematical history. His creative thinking led to the development of a decimal system that allowed for more precise calculations. The strength of this system lies in its simplicity, as it is easy to calculate with regardless of the size or number of decimal places.

Historian Glen Van Brummelen studied Bianchini’s work and discovered that his use of decimals was more advanced than previously thought. In particular, Van Brummelen found that Bianchini used the comma in the same way as Clavius did in 1593, showing that Clavius likely adopted the practice from Bianchini.

The discovery of Bianchini’s use of decimals sheds light on the history of mathematics and highlights how mathematical concepts have evolved over time. It also shows us how even small advancements can have a significant impact on our ability to solve complex problems.

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