- LEVEL - the level of the cell.
- CHILD - a list of qepcad Cell data structures, the children.
- ASSIGNED - Assignment flag (for parallel execution only).
- TRUTH - the truth value of the cell: TRUE, FALSE, or UNDET.
- SAMPLE - a sample point data structure.
- INDX - the index of the cell as a list.
- SIGNPF - a list (S_1,...,S_k), where k is the LEVEL of the cell. S_i is a list (s_1,...,s_n) where n is the number of k-i+1 level projection factors, and s_j is the sign of P_(k-i+1,j) in the cell.
- HOWTV - how the truth value was assigned, the possibilities are BYTEV = trial evaluation, BYPRP = propogation, BYEQC = equational constraint, and NOTDET = not determined.
- DEGSUB - List of degrees of substituted projection factors.
- MULSUB - List of multiplicities of substituted projection factors. The list of multiplicities of substituted projection factors is a list ((i_1,e_1),...,(i_n,e_n)), n >= 0, with i_1 < i_2 < ... < i_n and each e_j > 0 where the i_j are the second indices of all k-level projection factors which are zero in the cell and e_j is the multiplicity of the zero. This is a null list for each sector, a non-null list for each section.

Christopher W Brown Last modified: Tue Jul 30 15:25:13 EDT 2002