I want to know the answer to the following question:
Who co-wrote Principia Mathematica with Whitehead?
All the background I'm provided with is that "A Treatise on Universal Algebra (1898), Principia Mathematica (co-written with Bertrand Russell and published in three volumes between 1910 and 1913), and An Introduction to Mathematics (1911).". Is that enough to answer the question?
Answer: yes