Hi I hope this question is not too soft
I am curious about the work of Abel.
I have found his work in this link http://www.abelprize.no/nedlastning/litteratur/houzel_the_work.pdf
Currently I have some proof based knowledge from highschool calculus, vector, differential equations etc. and some knowledge about sets and de morgan laws.
Which kind of prequisite do I need to have in order to understand Abel's work (look in the link)