We show some results connected with the problem whether it is consistent
that every sup-measurable function F:**R**^{2}-->**R** is
measurable. We also relate this problem to
a von Weizsacker problem concerning
a generalization of Blumberg theorem.

**Requires rae.cls file**
and amstex.sty

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Postscript files** are available at the
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**Last modified September 10, 1998.**