Step
*
of Lemma
absval-diff-product-bound2
∀u,v,x,y:ℤ. (|(u * v) - x * y| ≤ ((|u| * |v - y|) + (|y| * |u - x|)))
BY
{ (Intros
THEN (RWO "absval_mul<" 0 THENA Auto)
THEN (RWO "int-triangle-inequality<" 0 THENA Auto)
THEN RW IntNormC 0
THEN Auto) }
Latex:
Latex:
\mforall{}u,v,x,y:\mBbbZ{}. (|(u * v) - x * y| \mleq{} ((|u| * |v - y|) + (|y| * |u - x|)))
By
Latex:
(Intros
THEN (RWO "absval\_mul<" 0 THENA Auto)
THEN (RWO "int-triangle-inequality<" 0 THENA Auto)
THEN RW IntNormC 0
THEN Auto)
Home
Index