let V be Z_Module; :: thesis: for a being Element of INT.Ring
for L being Linear_Combination of V st a <> 0. INT.Ring holds
Carrier (a * L) = Carrier L
let a be Element of INT.Ring; :: thesis: for L being Linear_Combination of V st a <> 0. INT.Ring holds
Carrier (a * L) = Carrier L
let L be Linear_Combination of V; :: thesis: ( a <> 0. INT.Ring implies Carrier (a * L) = Carrier L )
set R = INT.Ring ;
set T = { u where u is Vector of V : (a * L) . u <> 0. INT.Ring } ;
set S = { v where v is Vector of V : L . v <> 0. INT.Ring } ;
assume A1: a <> 0. INT.Ring ; :: thesis: Carrier (a * L) = Carrier L
{ u where u is Vector of V : (a * L) . u <> 0. INT.Ring } = { v where v is Vector of V : L . v <> 0. INT.Ring }

proof

thus { u where u is Vector of V : (a * L) . u <> 0. INT.Ring } c= { v where v is Vector of V : L . v <> 0. INT.Ring } :: according to XBOOLE_0:def 10 :: thesis: { v where v is Vector of V : L . v <> 0. INT.Ring } c= { u where u is Vector of V : (a * L) . u <> 0. INT.Ring }

proof

let x be object ; :: according to TARSKI:def 3 :: thesis: ( not x in { u where u is Vector of V : (a * L) . u <> 0. INT.Ring } or x in { v where v is Vector of V : L . v <> 0. INT.Ring } )
assume x in { u where u is Vector of V : (a * L) . u <> 0. INT.Ring } ; :: thesis: x in { v where v is Vector of V : L . v <> 0. INT.Ring }
then consider u being Vector of V such that
A2: x = u and
A3: (a * L) . u <> 0. INT.Ring ;
(a * L) . u = a * (L . u) by VECTSP_6:def 9;
then L . u <> 0. INT.Ring by A3;
hence x in { v where v is Vector of V : L . v <> 0. INT.Ring } by A2; :: thesis: verum

end;

let x be object ; :: according to TARSKI:def 3 :: thesis: ( not x in { v where v is Vector of V : L . v <> 0. INT.Ring } or x in { u where u is Vector of V : (a * L) . u <> 0. INT.Ring } )
assume x in { v where v is Vector of V : L . v <> 0. INT.Ring } ; :: thesis: x in { u where u is Vector of V : (a * L) . u <> 0. INT.Ring }
then consider v being Vector of V such that
A4: x = v and
A5: L . v <> 0. INT.Ring ;
(a * L) . v = a * (L . v) by VECTSP_6:def 9;
then (a * L) . v <> 0. INT.Ring by A1, A5;
hence x in { u where u is Vector of V : (a * L) . u <> 0. INT.Ring } by A4; :: thesis: verum

end;

hence Carrier (a * L) = Carrier L ; :: thesis: verum