Questions LLC
Login
or
Sign Up
Ask a New Question
Mathematics
Set Theory
Closed sets
Arbitrary union of closed set is closed Prove or disprove
1 answer
The union of closed sets [1/n;1-1/n] is not closed (the real line topology)
You can
ask a new question
or
answer this question
.
Related Questions
A circuit has R = 16.6 Ω and the battery emf is 6.50 V . With switch S2 open, switch S1 is closed. After several minutes, S1 is
Strictly speaking, NO system can be completely closed - for example, hot liquid in the best thermos eventually cools down - but
Which of the following describes a representative sample?(1 point)
Responses information presented to prove or disprove a point
EXTENDING THE LESSON If you add any two rational numbers, the sum is always a rational number. So, the set of rational numbers
Which of the following describes a representative sample?(1 point)Responsesinformation presented to prove or disprove a
consider the following polynomials. ab^2 +3ab+8a^2 and -5ab^2
Use the two polynomials to illustrate the following: a. polynomials
Which of the following describes a representative sample?(1 point)
Responses information presented to prove or disprove a point
Why is it important for an author to include an opposing claim?(1 point)Responsesto introduce the other side, then disprove itto
Prove or disprove the arbitrary union of closed set is closed?
Given: f(closure(A)) subset of closure(f(A))
Prove: For any closed set A in Y, f^-1(A) is closed in X (AKA f is continuous) X and
