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Unless some other LHS value is shown, each identity equates to [1], i.e. PI/4 (see the 'Identity lists' page for a full description of how identities are displayed).
1.58604 STØRMER (1896) (¢¢2.30154,¢¢2.37598,¢¢2.38268) 44[57]+7[239]-12[682]+24[12943] Eliminated:{A}[11] 1.63435 ESCOTT (1896) 22[28]+2[443]-5[1393]-10[11018] Eliminated:[2][14]([28]) 1.71075 ARNDT (1993) 17[23]+8[182]+10[5118]+5[6072] Eliminated:[2][12&104]([23]) 1.75032 MRW (1980) (*1.86105) 16[21]+3[239]+4[347]-4[361577] Eliminated:[4][5]([347]) 1.77990 TAKANO (1982) (¢¢2.37598) 12[49]+32[57]-5[239]+12[110443] Eliminated:{A}([49]) 1.79645 MATSUMOTO (1996) (*1.86105) 16[21]+3[239]+4[343]-4[27493] Eliminated:[2&19][4][5] Top of page 1.79992 ASN (29Jun09) (*1.86105) 16[21]+3[239]+4[353]+4[21637] Eliminated:[4][5]([353]) 1.80943 CASTELLANOS (1988) (*1.94191) 12[15]-[239]-4[433]+4[1875333] Eliminated:{A}([15][433]) 1.81330 MRW (1980) 17[22]+3[172]-2[682]-7[5357] Eliminated:[2][11]([22]) 1.82119 MRW (1980) 16[21]+7[239]-4[616]+4[3141] Eliminated:[4][5][10] Cf. 2-digit identity with measure 1.71068 1.83520 ARNDT (1993) 16[20]-[239]-4[515]-8[4030] Eliminated:[5][10]({20]) 1.84407 ARNDT (1993) 24[53]+20[57]-5[239]+12[4443] Eliminated:{A}([53]) 1.85102 MRW (23Jun09) (¢¢2.64766) 24[29]-4[57]+7[239]-12[12238] Eliminated:{A} N.B. 2[29]-[12238] = [29/2]; measure calculated accordingly. Top of page 1.85423 ARNDT (1993) 12[18]+8[109]+11[239]-8[6826318] Eliminated:{A}([109]) 1.86105 ARNDT (1993) 16[21]+3[239]+4[421]+4[1985] Eliminated:[4][5][20] (v. derivations above, & 5-term 2-digit identity (1.74096)) 1.88483 HCL (28Sep93) (*1.89498) 17[26]+5[38]+3[2682]-7[8827] Eliminated: [2][4]([26]) 1.89498 ARNDT (1993) 17[26]+5[38]+3[2057]-10[8827] Eliminated:[2][4]([26]) 1.91841 ARNDT (1993) 24[29]-4[57]+7[239]-12[12238] Eliminated:{A}([29]) 1.94191 CASTELLANOS (1988) 12[15]-[239]-4[580]-4[1710] Eliminated:[2&107][5]([15]) Top of page 1.96468 CASTELLANOS (1988) 8[10]-[239]-8[1020]+4[52525] Eliminated:[5]([10][1020]) 1.96806 HCL (26Jan95) (*2.12025) 12[18]+8[75]+3[239]+8[39307] Eliminated:{A}[12&22] 1.97678 ARNDT (1993) 5[1]=44[11]-9[239]-16[682]-12[12943] Eliminated:{A}([11]) 1.99851 HCL (26Jan95) (*2.05885) 12[26]+20[57]-5[239]-12[2057] Eliminated:{A}([26]} 2.01918 ARNDT (1993) 20[57]+24[68]+12[117]-5[239] Eliminated:{A}[6] 2.03480 GAUSS (1876) 12[38]+20[57]+7[239]+24[268] Eliminated:{B} Top of page 2.04205 ARNDT (1993) (*2.12025) 12[18]+8[73]+3[239]-8[2943] Eliminated:{A}[9] 2.05885 ARNDT (1993) 12[28]+20[57]-5[239]+12[443] Eliminated:{A}([28]) 2.06116 KOEPP (1994) 7[8]-4[47]+2[247057]-[740943] Eliminated:[2][4][5&114] 2.12025 LEHMER (1938) (*2.24178) 12[18]+8[99]+3[239]+8[307] Eliminated:{A}[12] 2.12663 ARNDT (1993) 2[1]=11[7]+4[443]+[1393]+2[11018] Eliminated:[2][14][28] Top of page 2.17433 STØRMER (1896) 10[22]+7[41]+12[75]+2[4193] Eliminated:[2][12]([22]) 2.24178 BENNETT (1925) 12[18]+3[70]+5[99]+8[307] Eliminated:{A}[12] 2.28539 STØRMER (1896) 12[17]+3[57]+5[99]-7[307] Eliminated:{A}[12] 2.52115 ARNDT (1993) 10[17]+2[38]+7[41]-4[157] Eliminated:{C -5} Top of page