Ross indexed the following pages under the keyword: "Congruence".

Congruence Equilibrium defines a 'thing' Equilibrium essential definition Field (of substitution) nomenclature Summary: "Equilibrium" means not moving out of a given region. (But see 1143) 1091 1092

Class I.e. not to individual Congruence Ideal (mathematical) Information 'complete' within limits Quotient machine and residue class Residues (of congruences) Summary: Residue classes in behaviour. Basin as partition Partition lattice theory 3996 3997

Summary: Meaning of H(A)=0. Congruence in matrix Coordination example in matrix equilibrium Directive correlation (Sommerhoff) example in matrix Equilibrium example of coordination at Higher geometry of fields and matrix theory [30]: (Mod 12) MATRIX has VECTOR as equilibrium (and 23 other, given, vectors), 6163. 6162 6163