A formalization of the first proof from [6].
@article{bwmeta1.element.doi-10_2478_v10037-007-0020-9, author = {Freek Wiedijk}, title = {Arrow's Impossibility Theorem}, journal = {Formalized Mathematics}, volume = {15}, year = {2007}, pages = {171-174}, language = {en}, url = {http://dml.mathdoc.fr/item/bwmeta1.element.doi-10_2478_v10037-007-0020-9} }
Freek Wiedijk. Arrow's Impossibility Theorem. Formalized Mathematics, Tome 15 (2007) pp. 171-174. http://gdmltest.u-ga.fr/item/bwmeta1.element.doi-10_2478_v10037-007-0020-9/
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