On Thursday 05 June 2008 16:33:48 Patrick O'Callaghan wrote: > Somewhat OT, but there's a proof that a 4-legged table (under the above > conditions) can always be placed in a stable -- i.e. non-rocking -- > position on an irregular (but non-stepped) surface by rotating it about > its vertical axis. See for example > http://www.maa.org/devlin/devlin_02_07.html I'll remember that, next time I'm in a restaurant with a sand floor :-) Anne
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