Plasmataco Plasmataco

21-11-2017
Mathematics

contestada

Is R-Z(Real numbers - integers) an open topology?

Respuesta :

SecretStupid SecretStupid

28-11-2017

R−Z is a union of countable many open sets so R−ZR−Z is open
I actually didn't know that I had to look it up and got my answer from another site, oppsie doopsies

Ver imagen SecretStupid

Answer Link

Otras preguntas

D. Rom has just given an insurance company $35,000. In return, he will receive an annuity of $3,700 for 20 years. At what rate of return must the insurance comp

Which of the following presidents was in office when portions of the National Park System were sold to lumberjacks? A. Teddy Roosevelt B. William Taft C. Willia

Laura is shy but confident. (person)

What is the volume of the cone

what is cyclic and noncyclic photo-phosphorylation

2X(X+y) + 2y(3X-y) Please help me

m 2 = aº, m 3 = bº, m 41 a b a + b a-b

expresión algebraica el cuadrado del cubo de la suma de dos números

Why do you think international trade is so important to the world economy?

You are dealt one card from a 52-card deck. Find the probability that you are not dealt a heart. The probability is ___. (Type an integer or a fraction. Simp