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May 12, 2020 at 19:55 comment added Abdelmalek Abdesselam Then you have to explain: prove this continuity from what? Can't prove a theorem without hypotheses.
Feb 7, 2020 at 21:55 comment added B.Hueber According to the exercise I shoud proove the statement claimed in the box....
Feb 6, 2020 at 15:52 history answered Abdelmalek Abdesselam CC BY-SA 4.0