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I am looking for an exact quote from Jean Dieudonné saying more or less that

there are three kinds of important problems in mathematics: 
problems of existence, classification and construction.

The quote may be in French or English, I guess I have read it in the forewords of one of his books, but I can't find it now. I also browsed his book "Pour l'honneur de l'esprit humain" without success.

EDIT: I am starting to doubt that it is a quote from Dieudonne. It could be from Andre Weil instead...

I am looking for an exact quote from Jean Dieudonné saying more or less that

there are three kinds of important problems in mathematics: problems of existence, classification and construction.

The quote may be in French or English, I guess I have read it in the forewords of one of his books, but I can't find it now. I also browsed his book "Pour l'honneur de l'esprit humain" without success.

EDIT: I am starting to doubt that it is a quote from Dieudonné. It could be from Andre Weil instead….

I am looking for an exact quote from Jean Dieudonné saying more or less that

there are three kinds of important problems in mathematics: 
problems of existence, classification and construction.

The quote may be in French or English, I guess I have read it in the forewords of one of his books, but I can't find it now. I also browsed his book "Pour l'honneur de l'esprit humain" without success.

I am looking for an exact quote from Jean Dieudonné saying more or less that

there are three kinds of important problems in mathematics: 
problems of existence, classification and construction.

The quote may be in French or English, I guess I have read it in the forewords of one of his books, but I can't find it now. I also browsed his book "Pour l'honneur de l'esprit humain" without success.

EDIT: I am starting to doubt that it is a quote from Dieudonne. It could be from Andre Weil instead...

I am looking for an exact quote from Jean Dieudonné saying more or less that

there are three kind of important problems in mathematics: 
problems of existence, classification and construction.

The quote may be in french or english, I guess I have read it in the forewords of one of his books, but I can't find it now. I also browsed his book "Pour l'honneur de l'esprit humain" without success.

I am looking for an exact quote from Jean Dieudonné saying more or less that

there are three kinds of important problems in mathematics: 
problems of existence, classification and construction.

The quote may be in French or English, I guess I have read it in the forewords of one of his books, but I can't find it now. I also browsed his book "Pour l'honneur de l'esprit humain" without success.