| ⊦ gstore[m] = groupblock(gndx, lax, n0) ∧ m ∈ gstore ∧ n0 ≤ m0 ∧ valid-group-nodes(gndx) ≤ n0 → nodes(gstore ↓[m, groupblock(gndx, lax, m0) ↓], ginval) = nodes(gstore ↓, ginval) |
gstore[m] = groupblock(gndx, lax, n0), m ∈ gstore, n0 ≤ m0, valid-group-nodes(gndx) ≤ n0 ⊦ nodes(gstore ↓[m, groupblock(gndx, lax, m0) ↓], ginval) = nodes(gstore ↓, ginval)