let M be non empty Reflexive symmetric MetrStruct ; :: thesis: for a being real number
for T being Relation of , st T = dist_toler M,a & a >= 0 holds
T is Tolerance of
let a be real number ; :: thesis: for T being Relation of , st T = dist_toler M,a & a >= 0 holds
T is Tolerance of
let T be Relation of ,; :: thesis: ( T = dist_toler M,a & a >= 0 implies T is Tolerance of )
assume that
A1: T = dist_toler M,a and
A2: a >= 0 ; :: thesis: T is Tolerance of
A3: ( the distance of M is symmetric & the distance of M is Reflexive ) by METRIC_1:def 7, METRIC_1:def 9;
T = low_toler the distance of M,a by A1, Th33;
hence T is Tolerance of by A2, A3, Th18; :: thesis: verum