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awarded  Teacher
Jan
28
comment What is the dual of a pre-injective map?
It is my first time to use Mathoverflow. I would like to post it as a comment, not an answer. Now, I know how to post a comment ^^.
Jan
28
awarded  Editor
Jan
28
revised What is the dual of a pre-injective map?
It is my first time to use Mathoverflow. I typed it again for math formulas.; added 2 characters in body
Jan
28
answered What is the dual of a pre-injective map?