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For questions requesting examples of a certain structure or phenomenon

2 votes
1 answer
1k views

Example of restriction of a finite morphism which is not finite

Every closed immersion is a finite morphism. Therefore, restriction of a finite morphism to a closed subset is always a finite morphism itself. Can you give an example of quasi-projective varieties $X …
Paul Yuryev's user avatar
1 vote
1 answer
1k views

Example of inclusion which is not a finite morphism [closed]

Every closed immersion is a finite morphism. Can you give an example of quasi-projective varieties $X\subset Y$ such that inclusion $X\hookrightarrow Y$ is not finite? Same with Y projective? Thanks! …
Paul Yuryev's user avatar