Article snapshot taken from Wikipedia with creative commons attribution-sharealike license.
Give it a read and then ask your questions in the chat.
We can research this topic together.
{{cite book |last=Mumford |first=David |translator-first=test 1 |translator-last= test 2 |authorlink=David Mumford |date=1999 |title=The Red Book of Varieties and Schemes: Includes the Michigan Lectures (1974) on Curves and Their Jacobians |edition=2nd |publisher=] |doi=10.1007/b62130 |isbn=354063293X}}