PNG  IHDR*i0PLTE@@@ftRNSS pHYsetEXtTitleInftyEditor MathImageytEXtAuthorAdministrator*StEXtDescription $2^{n}(z_{r+1}-z_{r}) \equiv f(x_{r}, y_{r})-y_{r+1} {\rm mod}2^{n+1}$dH6]tEXtCopyrightInftyProject@$tEXtCreation Time r'rr'rr }IDATxY v Ud6 aֺM|ti$/"-3p/ F"oYτ%WMāuS8uL.NV+Xf}vߛ/ѬOޛ/ѬE%WQyJ">]nheMsX7lU|~G2itdp Տ8ACˊh|]:cC/ ( G !pmrK\$ (ˢWng9V{&-r ~:c9, %4#eaگi[o A􄚓F4Ovlr9?S%4c%Y>91 i8n#(Zd+6Cj8CK֜i&Ć<5-31Xlr5*ͤ;4];]*&rAV#!"Y{YjoV {hFL:\"H@3A5=l]/,%ry5&{+K*sL3,Ko?gʯo@K4U=N&k֤85f%]%d8#u;Ҭj4 t`,~WNoS uta~U;!ϞofQ&ԔYKt-Au*e ?/1CL3cw M濯,aqDMMp,F(|NY>H&N YctW%݆W˔Ԕ8kC=_{)yjㄚg,e]_" F7|ژZ)ϳao|CԿVe=޲ oYτ[-sIENDB`