XYZ is one of the greatest.this one is wrong because the sentence will be :
Daniel Bernoulli
is one of the greatest mathematicians of the 18th century and the father of modern hydrodynamics
dedicated his life to pioneering work in astronomy and mathematical physics.
In this case, the subject "Daniel" has a verb "is", leaving "dedicated with no subject to relate to.
XYZ, one of the greatestXYZ, who was one of the greatestboth are right and can be equally used (in the context you suggested)[/quote]
HI Mahmoudfawzy83,
I THINK : Daniel Bernoulli IS one of the greatest mathematicians of the 18th century and the father of modern hydrodynamics dedicated
his life to pioneering work in astronomy and mathematical physics.
Dedicated refers to his and that to Daniel Bernoulli.
why is the sentence wrong den??