let S be non empty non void bool-correct 4,1 integer BoolSignature ; :: thesis: for X being non-empty ManySortedSet of the carrier of S
for T being b₁,S -terms all_vars_including inheriting_operations free_in_itself vf-free integer VarMSAlgebra over S
for C being bool-correct 4,1 integer image of T
for I being integer SortSymbol of S
for t1, t2 being Element of T,I
for u being ManySortedFunction of FreeGen T, the Sorts of C holds (t1 * t2) value_at (C,u) = (t1 value_at (C,u)) * (t2 value_at (C,u))
let X be non-empty ManySortedSet of the carrier of S; :: thesis: for T being X,S -terms all_vars_including inheriting_operations free_in_itself vf-free integer VarMSAlgebra over S
for C being bool-correct 4,1 integer image of T
for I being integer SortSymbol of S
for t1, t2 being Element of T,I
for u being ManySortedFunction of FreeGen T, the Sorts of C holds (t1 * t2) value_at (C,u) = (t1 value_at (C,u)) * (t2 value_at (C,u))
let T be X,S -terms all_vars_including inheriting_operations free_in_itself vf-free integer VarMSAlgebra over S; :: thesis: for C being bool-correct 4,1 integer image of T
for I being integer SortSymbol of S
for t1, t2 being Element of T,I
for u being ManySortedFunction of FreeGen T, the Sorts of C holds (t1 * t2) value_at (C,u) = (t1 value_at (C,u)) * (t2 value_at (C,u))
let C be bool-correct 4,1 integer image of T; :: thesis: for I being integer SortSymbol of S
for t1, t2 being Element of T,I
for u being ManySortedFunction of FreeGen T, the Sorts of C holds (t1 * t2) value_at (C,u) = (t1 value_at (C,u)) * (t2 value_at (C,u))
let I be integer SortSymbol of S; :: thesis: for t1, t2 being Element of T,I
for u being ManySortedFunction of FreeGen T, the Sorts of C holds (t1 * t2) value_at (C,u) = (t1 value_at (C,u)) * (t2 value_at (C,u))
let t1, t2 be Element of T,I; :: thesis: for u being ManySortedFunction of FreeGen T, the Sorts of C holds (t1 * t2) value_at (C,u) = (t1 value_at (C,u)) * (t2 value_at (C,u))
let u be ManySortedFunction of FreeGen T, the Sorts of C; :: thesis: (t1 * t2) value_at (C,u) = (t1 value_at (C,u)) * (t2 value_at (C,u))
consider f being ManySortedFunction of T,C such that
A1: ( f is_homomorphism T,C & u = f || (FreeGen T) ) by MSAFREE4:46;
A2: t2 value_at (C,u) = (f . I) . t2 by A1, Th28;
A3: (t1 * t2) value_at (C,u) = (f . I) . (t1 * t2) by A1, Th28;
set o = In (( the connectives of S . 8), the carrier' of S);
A4: ( the_arity_of (In (( the connectives of S . 8), the carrier' of S)) = <*I,I*> & the_result_sort_of (In (( the connectives of S . 8), the carrier' of S)) = I ) by Th18;
then Args ((In (( the connectives of S . 8), the carrier' of S)),T) = product <*( the Sorts of T . I),( the Sorts of T . I)*> by Th23;
then reconsider p = <*t1,t2*> as Element of Args ((In (( the connectives of S . 8), the carrier' of S)),T) by FINSEQ_3:124;
thus (t1 * t2) value_at (C,u) = (Den ((In (( the connectives of S . 8), the carrier' of S)),C)) . (f # p) by A1, A3, A4
.= (Den ((In (( the connectives of S . 8), the carrier' of S)),C)) . <*((f . I) . t1),((f . I) . t2)*> by A4, Th26
.= (t1 value_at (C,u)) * (t2 value_at (C,u)) by A1, A2, Th28 ; :: thesis: verum