Anyone who has ever been shown how to divide fractions was taught to invert and multiply. That has been done for more than 1000 years. It was used for floating point in the early 1960s in the CDC 6600, then later in the IBM System/360 Model 91 in about 1965.Albert wrote:When was "multiplicative reciprocal" invented???

When i came up with the idea , Richard didn't have any knowledge of it , And Richard is a professional mathematician..

And he used it in his code :

I used the technique in 1982 when I was designing a new floating point unit for a parallel processor. The technique was 20 year old technology, and any patents had expired.

I was just a geologist then, who got distracted by electronic instrumentation and number crunching.

I am not a professional mathematician.