>The smallest squared square consists of a square disected into 21 squares
>all different.. It was to my amazement that there can be no cubed cube. I
>know the proof of Tutte, which is very beautiful. But where and when did
>he publish it?
Sam,
Which is the 2ndary source you know the proof from?
Is it the ch. 22 (Impossible Cubed Cube, Snowflake Curve, Escher's Drawing
Hands) of M. Gardner's Sixth Book of Mathematical Games from Scientific
American, San Francisco: Freeman, 1971 ?
If no, then have a look at (MG usually, but not always, mentions his primary
sources).
Sorry, my copy is misplaced... :-(
Antreas