let P be non empty Poset; :: thesis: for S being non empty non void ManySortedSign
for OAF being OrderedAlgFam of P,S
for B being Binding of OAF
for i, j being Element of P st i >= j & i <> j holds
B . (j,i) = () . (j,i)

let S be non empty non void ManySortedSign ; :: thesis: for OAF being OrderedAlgFam of P,S
for B being Binding of OAF
for i, j being Element of P st i >= j & i <> j holds
B . (j,i) = () . (j,i)

let OAF be OrderedAlgFam of P,S; :: thesis: for B being Binding of OAF
for i, j being Element of P st i >= j & i <> j holds
B . (j,i) = () . (j,i)

let B be Binding of OAF; :: thesis: for i, j being Element of P st i >= j & i <> j holds
B . (j,i) = () . (j,i)

let i, j be Element of P; :: thesis: ( i >= j & i <> j implies B . (j,i) = () . (j,i) )
assume that
A1: i >= j and
A2: i <> j ; :: thesis: B . (j,i) = () . (j,i)
( (Normalized B) . (j,i) = IFEQ (j,i,(id the Sorts of (OAF . i)),((bind (B,i,j)) ** (id the Sorts of (OAF . i)))) & IFEQ (j,i,(id the Sorts of (OAF . i)),((bind (B,i,j)) ** (id the Sorts of (OAF . i)))) = (bind (B,i,j)) ** (id the Sorts of (OAF . i)) ) by ;
then (Normalized B) . (j,i) = bind (B,i,j) by MSUALG_3:3;
hence B . (j,i) = () . (j,i) by ; :: thesis: verum