987.130 Primary and Secondary Great-circle Symmetries
987.131 There are seven other secondarysymmetries based on the pairing into spin poles of vertexes produced by the complex secondary crossings of one another of the seven original great circle symmetries.
987.132 The primary and secondary icosa symmetries altogether comprise 121 = 11^{2} great circles. (See Fig. 987.132E.)
987.133 The crossing of the primary 12 great circle s of the VE at G (see Fig. 453.01, as revised in third printing) results in 12 ne w axes to generate 12 new great circles. (See color plate 12.)
987.134 The crossing of the primary 12 great circles of the VE and the four great circles of the VE at C (Fig. 453.01) results in 24 new axes to generate 24 new great circles . (See color plate 13.)
987.135 The crossing of the primary 12 great circle s of the VE and the six great circles of the VE atE(Fig. 453.01) results in 12 new axes to generate 12 new great circles. (See color plate 14.)
987.136 The remaining crossing of the primary 12 great circles of the VE at F (Fig. 453.01) results in 24 more axes to generate 24 new great circles. (See color plate 15.)
987.137 The total of the above-mentioned secondarygreat circles of th e VE is 96 new great circles (See Fig. 987.137B.)
Figure 34: Fig. 987.132E Composite of Primary and Secondary Icosahedron Great Circle Sets : This is a black-and-white version of color plate 30. The Basic Disequilibrium 120 LCD triangle as presented at Fig. 901.03 appears here shaded in the spherical grid. In this composite icosahedron spherical matrix all of the 31 primary great circles appear together with the three sets of secondary great circles. (The three sets of secondary icosahedron great circles are shown successively at color pla tes 27–29.)Figure 34: Fig. 987.132E Composite of Primary and Secondary Icosahedron Great Circle Sets : This is a black-and-white version of color plate 30. The Basic Disequilibrium 120 LCD triangle as presented at Fig. 901.03 appears here shaded in the spherical grid. In this composite icosahedron spherical matrix all of the 31 primary great circles appear together with the three sets of secondary great circles. (The three sets of secondary icosahedron great circles are shown successively at color pla tes 27–29.)