Recent content by clg211

For the the equivalence part, I want to show that the difference of the Cauchy sequence and its subsequence is a null sequence. Let xn and xnk exist in the Cauchy sequence where xnk is also an element in the subsequence. Therefore, |xn - xnk| < epsilon for n, nk < N, so Cauchy sequence -...

Hi, I need to prove that any infinite subsequence {xnk}of a Cauchy sequence {xn}is a Cauchy sequence equivalent to {xn}. My problem is that it seemed way too easy, so I'm concerned that I missed something. Please see the attachment for my solution, and let me know what you think. Thanks.

Hi, I'm trying to prove that there's a bijection between the open interval (0,1) and the set of all sequences whose elements are 0 or 1 in order to show cardinality continuum. So let C={a1, a2, a3,...|ai is either 0 or 1} which is the set of all sequences of 0's and 1's and let...

I was reading that the "exchange rows" operation can be achieved through the other two operations: multiplication by a nonzero number and adding a multiple of one row to another. Any thoughts on the actual algorithm for achieving an exchange of rows through these other two operations? I...