theorem Th38: :: CQC_SIM1:38

for A being QC-alphabet
for p, q being Element of CQC-WFF A
for t being QC-symbol of A
for K being Element of Fin (bound_QC-variables A)
for f being Element of Funcs ((bound_QC-variables A),(bound_QC-variables A)) st [q,t,K,f] in SepQuadruples p holds
still_not-bound_in q c= (still_not-bound_in p) \/ K