let i be Element of NAT ; :: thesis: for p being NAT -defined the Instructions of SCM -valued finite Function holds Shift (IncAddr p,i),i = Reloc p,i
let p be NAT -defined the Instructions of SCM -valued finite Function; :: thesis: Shift (IncAddr p,i),i = Reloc p,i
dom (IncAddr p,i) = dom p by AMISTD_2:def 15;
then A1: dom (Shift p,i) = { (m + i) where m is Element of NAT : m in dom (IncAddr p,i) } by VALUED_1:def 12
.= dom (Shift (IncAddr p,i),i) by VALUED_1:def 12 ;
A2: now
let x be set ; :: thesis: ( x in dom (Shift (IncAddr p,i),i) implies (Shift (IncAddr p,i),i) . x = (Reloc p,i) . x )
assume A3: x in dom (Shift (IncAddr p,i),i) ; :: thesis: (Shift (IncAddr p,i),i) . x = (Reloc p,i) . x
then A4: x in { (m + i) where m is Element of NAT : m in dom (IncAddr p,i) } by VALUED_1:def 12;
dom (Shift (IncAddr p,i),i) c= NAT by RELAT_1:def 18;
then reconsider x9 = x as Element of NAT by A3;
consider m being Element of NAT such that
A5: x = m + i and
A6: m in dom (IncAddr p,i) by A4;
A7: m in dom p by A6, AMISTD_2:def 15;
dom (Shift p,i) = { (mm + i) where mm is Element of NAT : mm in dom p } by VALUED_1:def 12;
then A8: x9 in dom (Shift p,i) by A5, A7;
A9: p /. m = p . m by A7, PARTFUN1:def 8
.= (Shift p,i) . (m + i) by A7, VALUED_1:def 12
.= (Shift p,i) /. x9 by A5, A8, PARTFUN1:def 8 ;
thus (Shift (IncAddr p,i),i) . x = (IncAddr p,i) . m by A5, A6, VALUED_1:def 12
.= IncAddr ((Shift p,i) /. x9),i by A7, A9, AMISTD_2:def 15
.= (Reloc p,i) . x by A8, AMISTD_2:def 15 ; :: thesis: verum
end;
dom (Reloc p,i) = dom (Shift p,i) by AMISTD_2:def 15;
hence Shift (IncAddr p,i),i = Reloc p,i by A1, A2, FUNCT_1:9; :: thesis: verum