YES plusx0xplusxsysplusxytimesx00timesxsyplusxtimesxyminusx0xminussxsyminusxydiv0sy0divsxsysdivminusxysyplustimesplustimes2.1plusxyplusyxtimesxytimesyxplusplusxyzplusxplusyztimestimesxyztimesxtimesyzplusxyplusyxtimesxytimesyxplusplusxyzplusxplusyztimestimesxyztimesxtimesyzplusplusxyzplusyztimestimesxyztimesyzplusxsyplusxytimesxsyplusxtimesxytimesxsytimesxyminussxsyminusxydivsxsydivminusxysydivsxsyminusxyplusplusx0extplusxextplusplusxsyextplussplusxyextplusplusxsyextplusxytimestimesx0exttimes0exttimestimesxsyexttimesplusxtimesxyexttimestimesxsyextplusxtimesxytimestimesxsyexttimesxyplusplusx0extplusxextplusplusxsyextplussplusxyexttimestimesx0exttimes0exttimestimesxsyexttimesplusxtimesxyexttimestimesx0exttimes0exttimesxsytimesxytimestimesxsyexttimesplusxtimesxyexttimestimesxsyexttimesxytimestimesxyztimesyztimesxytimesyxtimestimesxyztimesxtimesyztrue2times21211112times21211112s1111plus21211000timestimesxsyexttimesplusxtimesxyexttimestimesxsyexttimesxytimesxsytimesxyplusxsysplusxyplusplusxsyextplussplusxyextplusx0xplusplusx0extplusxexttimesxsyplusxtimesxytimestimesxsyexttimesplusxtimesxyexttimestimesx0exttimes0exttimesx00plusplusxyzplusxplusyzplusxyplusyxtimesxytimesyxtimestimesxyztimesxtimesyz2times21211112times223231312002plus21211s1311timestimesxyztimesyztimestimesx0exttimes0extplusxsysplusxyplusplusxsyextplussplusxyextplusx0xplusplusx0extplusxexttimesxsyplusxtimesxytimestimesxsyexttimesplusxtimesxyexttimestimesx0exttimes0exttimesx00plusplusxyzplusxplusyzplusxyplusyxtimesxytimesyxtimestimesxyztimesxtimesyztimesxsyplusxtimesxyfalsetimestimesxsyextplusxtimesxyfalseplusplusx0extplusxextplusxsyplusxyplusplusxsyextplussplusxyextplusplusxsyextplusxyplusplusxyzplusyzplusxyplusyxplusplusxyzplusxplusyztrue1plus22122plus21112s111000plusplusx0extplusxextplusx0xtimesx00timesxsyplusxtimesxyminusx0xminussxsyminusxydiv0sy0divsxsysdivminusxysyplusplusx0extplusxexttimestimesx0exttimes0exttimestimesxsyexttimesplusxtimesxyextplusxsysplusxyplusplusxsyextplussplusxyextplusx0xplusplusx0extplusxextplusplusxyzplusxplusyzplusxyplusyx1plus21112plus21112times21112s1111plusplusxsyextplusxyplusxsyplusxyplusxsysplusxyplusplusxsyextplussplusxyextplusxyplusyxtimesxytimesyxplusplusxyzplusxplusyztimestimesxyztimesxtimesyz1plus21112plus221112times21112s111plusplusxyzplusyzplusxsysplusxyplusplusxsyextplussplusxyextplusxyplusyxtimesxytimesyxplusplusxyzplusxplusyztimestimesxyztimesxtimesyz1plus21112plus211112s10plusplusxsyextplussplusxyextplusxsysplusxyplusplusxsyextplussplusxyextplusplusxyzplusxplusyzplusxyplusyxdivsxsydivminusxysytrue1div221s1221minus221000divsxsydivminusxysyminussxsyminusxyminusx0xdivsxsyminusxyfalseminussxsyminusxytrue1minus23132s111minussxsyminusxyplusx0xplusxsysplusxytimesx00timesxsyplusxtimesxyminusx0xminussxsyminusxydiv0sy0divsxsysdivminusxysyplusplusx0extplusxextplusplusxsyextplussplusxyexttimestimesx0exttimes0exttimestimesxsyexttimesplusxtimesxyextAProVEAProVE Commit ID: 48fb2092695e11cc9f56e44b17a92a5f88ffb256 marcel 20180622 unpublished dirty Statistics for single proof: 100.00 % (14 real / 0 unknown / 0 assumptions / 14 total proof steps)http://aprove.informatik.rwth-aachen.deJohnDoe