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faculty: "FEB" and publication year: "1991"
| Author | P.P. Wakker | | Title | Continuity of transformations |
| Journal | Economoc theory |
| Volume | 162 |
| Year | 1991 |
| Pages | 1-6 |
| ISSN | 0022247X |
| Faculty | Faculty of Economics and Business |
| Institute/dept. | FEB: Research Institute in Economics and Econometrics Amsterdam (RESAM) |
| Keywords | Decision-making; Mathematical methods |
| Abstract | Let u be a continuous function from Re to Re. Let f be a transformation (which in our terminology does not have to be bijective) from the range of u to Re. v = f(u(.)) is the composition of f and u. It is well-known that continuity of f implies continuity of v. We consider the reversed question: Does continuity of v imply continuity of f? Elementary as this question may be, we did not find a place in literature where the answer is given. In fact it is our experience that the probability that a mathematician at first sight will gamble on the wrong answer, is an increasing function of his familiarity with elementary analysis, and is always above 1/2. This paper will answer the reversed question above, in a somewhat more general setting, and give applications. |
| Document type | Article |
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