50 Greatest Mathematicians of the World - Rajesh Thakur - Google Books

https://books.google.de/books?id=lLkwBQAAQBAJ&pg=PA63&dq=Huygens+patent+1673&hl=en&sa=X&ved=0ahUKEwjR286NlJreAhVM-YUKHYJiClIQ6AE

Mathematics is considered the most dreaded subject. However it is extremely interesting and one should read about it. Had this subject not been interesting then some of the great physicist, doctors, lawyers, poets, story writers, etc., in their…