Suppose (an), a sequence in a metric space X, converges to L ∈
X. Show, if...
Suppose (an), a sequence in a metric space X, converges to L ∈
X. Show, if σ : N → N is one-one, then the sequence (bn = aσ(n))n
also converges to L.
Suppose K is a nonempty compact subset of a metric space X and
x∈X.
Show, there...
Suppose K is a nonempty compact subset of a metric space X and
x∈X.
Show, there is a nearest point p∈K to x; that is, there
is a point p∈K such that, for all other q∈K,
d(p,x)≤d(q,x).
[Suggestion: As a start, let S={d(x,y):y∈K} and show there is a
sequence (qn) from K such that the numerical sequence (d(x,qn))
converges to inf(S).] Let X=R^2 and T={(x,y):x^2+y^2=1}.
Show, there is a point z∈X and distinct points a,b∈T
that are nearest points to...
Please prove the following theorem:
Suppose (X,p) and (Y,b) are metric spaces, X is compact, and...
Please prove the following theorem:
Suppose (X,p) and (Y,b) are metric spaces, X is compact, and
f:X→Y is continuous.
Then f is uniformly continuous.
X =
{a,b,c,d,e}
T = {X, 0 , {a}, {a,b}, {a,e}, {a,b,e}, {a,c,d},
{a,b,c,d}}
Show that...
X =
{a,b,c,d,e}
T = {X, 0 , {a}, {a,b}, {a,e}, {a,b,e}, {a,c,d},
{a,b,c,d}}
Show that the sequence a,c,a,c, ,,,,,,, converges to d.
please...
Let (X,d)
be a complete
metric space, and T
a d-contraction
on X,
i.e., T:
X...
Let (X,d)
be a complete
metric space, and T
a d-contraction
on X,
i.e., T:
X
→ X
and there exists a q∈
(0,1) such that for all x,y
∈ X,
we have d(T(x),T(y))
≤ q∙d(x,y).
Let a
∈ X,
and define a sequence (xn)n∈Nin
X
by
x1 :=
a
and ∀n ∈
N: xn+1
:= T(xn).
Prove, for all n
∈ N,
that d(xn,xn+1)
≤ qn-1∙d(x1,x2).
(Use
the Principle of Mathematical Induction.)
Prove that (xn)n∈N
is a d-Cauchy
sequence in...
Let (X, d) be a compact metric space and let A ⊆ X. Suppose that
A...
Let (X, d) be a compact metric space and let A ⊆ X. Suppose that
A is not compact. Prove that there exists a continuous function f :
A → R, from (A, d) to (R, d|·|), which is not uniformly
continuous.
Let A⊆(X,d) a metric space. Suppose there are an infinite number
of elements in e1,e2,e3,...∈ A...
Let A⊆(X,d) a metric space. Suppose there are an infinite number
of elements in e1,e2,e3,...∈ A such that d(ei,ej)=4 if i≠j and
d(ei,ej)=0 if i=j for i,j=1,2,3...
Prove that A is not totally bounded.
(Please do not write in script and show all your steps and
definitions used)