:: deftheorem Def9 defines n_s_w JORDAN5D:def 9 :
for g being non constant standard special_circular_sequence
for b₂ being Nat holds
( b₂ = n_s_w g iff ( 1 <= b₂ & b₂ + 1 <= len g & g . b₂ = W-min (L~ g) ) );