user56876

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seen Jan 23 '13 at 17:19

Jan
23
comment A proof to the theorem: $\{s_n\}_n\subset\mathbb{R}$ is convergent if it is cauchy sequence.
@Freddy, i think considering increasing or decreasing is not work as a sequence may converge to a point with oscillating between positive and negative values. So may be what you mean is considering the sequence $\{t_m\}_m$ where $t_m=|s_m|$ right?
Jan
23
comment A proof to the theorem: $\{s_n\}_n\subset\mathbb{R}$ is convergent if it is cauchy sequence.
@IttayWeiss Oh, i see the problem, i should rather prove it converges to $\limsup$ instead of $\sup$, is it better now???
Jan
23
revised A proof to the theorem: $\{s_n\}_n\subset\mathbb{R}$ is convergent if it is cauchy sequence.
added 16 characters in body
Jan
23
comment A proof to the theorem: $\{s_n\}_n\subset\mathbb{R}$ is convergent if it is cauchy sequence.
@IttayWeiss ya, i mean the idea
Jan
23
asked A proof to the theorem: $\{s_n\}_n\subset\mathbb{R}$ is convergent if it is cauchy sequence.
Jan
20
asked Reference books or any sources advice for my advanced calculus course
Jan
17
comment find all sequence satisfies $y^n_1 + 2y^n_2 + · · · + 2011y^n_{2011} = a^{n+1}+1$
@HaraldHanche-Olsen I am not sure. This is a question from my friend.
Jan
17
awarded  Editor
Jan
17
revised find all sequence satisfies $y^n_1 + 2y^n_2 + · · · + 2011y^n_{2011} = a^{n+1}+1$
deleted 1 characters in body
Jan
17
asked find all sequence satisfies $y^n_1 + 2y^n_2 + · · · + 2011y^n_{2011} = a^{n+1}+1$
Jan
11
awarded  Student
Jan
11
asked Are all metric spaces topological spaces?