or false. Justify the answer and in case a proposition is false, provide a suitable counterexample. a) A convergent sequence in a metric space is a Cauchy sequence. b Let S be a set of R". If there exists a convergent sequence {r,} such that {rn} ro, ro E S, then S is closed. c) An upper hemicontinuos correspondence has the closed graph property
or false. Justify the answer and in case a proposition is false, provide a suitable counterexample. a) A convergent sequence in a metric space is a Cauchy sequence. b Let S be a set of R". If there exists a convergent sequence {r,} such that {rn} ro, ro E S, then S is closed. c) An upper hemicontinuos correspondence has the closed graph property
Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter10: Sequences, Series, And Probability
Section10.1: Infinite Sequences And Summation Notation
Problem 74E
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![Establish whether the following proposition are true
or false. Justify the answer and in case a proposition is false, provide a suitable
counterexample.
a) A convergent sequence in a metric space is a Cauchy sequence.
b Let S be a set of R*. If there exists a convergent sequence {rn} such that
{xn} → ro, ro E S, then S is closed.
c) An upper hemicontinuos correspondence has the closed graph property
d) Let X CR be a set and f: X X be a function. If X is compact and convex,
then f admits a fixed point.
e) Let V and U two vector spaces of finite dimension and let l: V →U be a linear
function. If ker l = {0}, then I is onto.
f) Consider a vector space V and let W be a subset of V.
If 0 € W,then W is a vector subspace of V](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fe5eeb09d-3d5c-40cc-977e-1f0da614df9d%2Fea2cd59e-e85b-44c8-9e58-e137ee9ac0c3%2Fnhivmai_processed.jpeg&w=3840&q=75)
Transcribed Image Text:Establish whether the following proposition are true
or false. Justify the answer and in case a proposition is false, provide a suitable
counterexample.
a) A convergent sequence in a metric space is a Cauchy sequence.
b Let S be a set of R*. If there exists a convergent sequence {rn} such that
{xn} → ro, ro E S, then S is closed.
c) An upper hemicontinuos correspondence has the closed graph property
d) Let X CR be a set and f: X X be a function. If X is compact and convex,
then f admits a fixed point.
e) Let V and U two vector spaces of finite dimension and let l: V →U be a linear
function. If ker l = {0}, then I is onto.
f) Consider a vector space V and let W be a subset of V.
If 0 € W,then W is a vector subspace of V
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