%0 Journal Article %A Richard Mansfield %T The non-existence of $Σ^1_2$ well-orderings of the Cantor set %J Fundamenta Mathematicae %D 1974 %P 279-282 %V 86 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/fm-86-3-279-282/ %R 10.4064/fm-86-3-279-282 %G en %F 10_4064_fm_86_3_279_282