Albert Einsteins handwritten notes on the theory of relativity fetched a record 11.6m (9.7m) at an auction in Paris on Tuesday.

The manuscript had been valued at about a quarter of the final sum, which is by far the highest ever paid for anything written by the genius scientist.

It contains preparatory work for the physicists signature achievement, the theory of general relativity, which he published in 1915.

Calling the notes without a doubt the most valuable Einstein manuscript ever to come to auction, Christies which handled the sale on behalf of the Aguttes auction house had estimated prior to the auction that it would fetch between 2m and 3m.

Previous records for Einsteins works were $2.8m for the so-called God letter in 2018, and $1.56m in 2017 for a letter about the secret to happiness.

The 54-page document was handwritten in 1913 and 1914 in Zurich, Switzerland, by Einstein and his colleague and confidant Michele Besso, a Swiss engineer.

Christies said it was thanks to Besso that the manuscript was preserved for posterity. This was almost like a miracle, it said, since Einstein would have been unlikely to hold on to what he considered to be a simple working document.

Today the paper offered a fascinating plunge into the mind of the 20th centurys greatest scientist, Christies said. It discusses his theory of general relativity, building on his theory of special relativity from 1905 that was encapsulated in the equation E=mc2.

Einstein died in 1955 aged 76, lauded as one of the greatest theoretical physicists of all time. His theories of relativity revolutionised his field by introducing new ways of looking at the movement of objects in space and time.

In 1913 Besso and Einstein attacked one of the problems that had been troubling the scientific community for decades: the anomaly of the planet Mercurys orbit, Christies said.

This initial manuscript contains a certain number of unnoticed errors, it added. Once Einstein spotted them, he let the paper drop, and it was taken away by Besso.

Scientific documents by Einstein in this period, and before 1919 generally, are extremely rare, Christies said. Being one of only two working manuscripts documenting the genesis of the theory of general relativity that we know about, it is an extraordinary witness to Einsteins work.

Einstein also made major contributions to quantum mechanics theory and won the Nobel physics prize in 1921. He became a pop culture icon thanks to his dry witticisms and trademark unruly hair, moustache and bushy eyebrows.

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Einsteins notes on theory of relativity fetch record 11.6m at auction - The Guardian