set R = resource (X,A,f);
thus
resource (X,A,f) is antisymmetric
( resource (X,A,f) is transitive & resource (X,A,f) is beta-transitive )proof
let x be
set ;
MMLQUER2:def 2 for y being set st x,y in resource (X,A,f) & y,x in resource (X,A,f) holds
x = ylet y be
set ;
( x,y in resource (X,A,f) & y,x in resource (X,A,f) implies x = y )
assume
(
x,
y in resource (
X,
A,
f) &
y,
x in resource (
X,
A,
f) )
;
x = y
then
(
A <- (f . x) <> 0 & (
A <- (f . x) < A <- (f . y) or
A <- (f . y) = 0 ) &
A <- (f . y) <> 0 & (
A <- (f . y) < A <- (f . x) or
A <- (f . x) = 0 ) )
by Def9;
hence
x = y
;
verum
end;
thus
resource (X,A,f) is transitive
resource (X,A,f) is beta-transitive proof
let x be
set ;
MMLQUER2:def 1 for y, z being set st x,y in resource (X,A,f) & y,z in resource (X,A,f) holds
x,z in resource (X,A,f)let y,
z be
set ;
( x,y in resource (X,A,f) & y,z in resource (X,A,f) implies x,z in resource (X,A,f) )
assume
(
x,
y in resource (
X,
A,
f) &
y,
z in resource (
X,
A,
f) )
;
x,z in resource (X,A,f)
then A1:
(
x in X &
y in X &
A <- (f . x) <> 0 & (
A <- (f . x) < A <- (f . y) or
A <- (f . y) = 0 ) &
z in X &
A <- (f . y) <> 0 & (
A <- (f . y) < A <- (f . z) or
A <- (f . z) = 0 ) )
by Def9;
then
(
A <- (f . x) < A <- (f . z) or
A <- (f . z) = 0 )
by XXREAL_0:2;
hence
x,
z in resource (
X,
A,
f)
by A1, Def9;
verum
end;
let x, y be Element of X; MMLQUER2:def 4 ( x,y nin resource (X,A,f) implies for z being Element of X st x,z in resource (X,A,f) holds
y,z in resource (X,A,f) )
assume A2:
x,y nin resource (X,A,f)
; for z being Element of X st x,z in resource (X,A,f) holds
y,z in resource (X,A,f)
let z be Element of X; ( x,z in resource (X,A,f) implies y,z in resource (X,A,f) )
assume
x,z in resource (X,A,f)
; y,z in resource (X,A,f)
then A3:
( x in X & z in X & A <- (f . x) <> 0 & ( A <- (f . x) < A <- (f . z) or A <- (f . z) = 0 ) & ( not x in X or not y in X or not A <- (f . x) <> 0 or ( not A <- (f . x) < A <- (f . y) & not A <- (f . y) = 0 ) ) )
by A2, Def9;
then
( A <- (f . y) <> 0 & ( A <- (f . y) < A <- (f . z) or A <- (f . z) = 0 ) )
by XXREAL_0:2;
hence
y,z in resource (X,A,f)
by A3, Def9; verum