"Under the old title 'Theory and calculation of alternating- current phenomena', is included only the discussion of the most common and general phenomena and apparatus ... All the material ... which ...

Theoretical physicists use machine-learning algorithms to speed up difficult calculations and eliminate untenable theories—but could they transform what it means to make discoveries? Theoretical ...

A rare manuscript with notes made by Albert Einstein was auctioned for more than $13 million. They contain the early calculations that eventually became Einstein's general theory of relativity.