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  • 98 votes cast
May
10
accepted Proving the limit of the power of two functions is the power of the limits?
May
10
asked Proving the limit of the power of two functions is the power of the limits?
May
5
comment One-one and continuous $\implies$ strictly monotonic
I think you mean contradicts injectivity, Edit: well you were faster than me :P
May
5
comment Proving that a union of a countable and an uncountable set is equivalent to the uncountable set (proof check)
@tetori This is the next topic so I guess I'll realize it soon :P
May
5
asked Proving that a union of a countable and an uncountable set is equivalent to the uncountable set (proof check)
May
4
comment Analysis: Basic Sequence Proof
Didn't downvote myself, but I think it's getting downvoted because it answers the half of what he asks that is "hidden" at the end.
May
4
comment Analysis: Basic Sequence Proof
Yep, you got it.
May
4
awarded  Teacher
May
4
answered Analysis: Basic Sequence Proof
Apr
28
comment Show that the series is absolutely convergent
Is showing that the series of absolute values converges enough to conclude that the original series converges absolutely, or do you have to show that the original series converges as well?
Apr
23
comment Does Russel's paradox preclude us from using the power set to generate every possible set?
Well as far as I understand, "the set of all things" is not a set, you can't just say "I take everything and call it $A$", and there is actually quite a delicate process describing what is or isn't a set.
Apr
23
comment Fixed point of a differentiable function on a closed interval
@cantorhead, oh well that makes it easy. Thanks!
Apr
23
comment Fixed point of a differentiable function on a closed interval
@GitGud Oh oops, fixed
Apr
23
revised Fixed point of a differentiable function on a closed interval
added 1 character in body; added 2 characters in body
Apr
23
asked Fixed point of a differentiable function on a closed interval
Apr
14
comment Finding a counter example for $ \left(A+A\right)'\subseteq\left(A'+A\right)\cup\left(A'+A'\right)$
I thought about the idea of searching for a set $A$ with no limit points, such that $A+A$ will have a limit point, but wasn't able to figure one out myself. Even the solution you gave took me quite a while to understand, but I get it now. Thanks!
Apr
14
accepted Finding a counter example for $ \left(A+A\right)'\subseteq\left(A'+A\right)\cup\left(A'+A'\right)$
Apr
14
asked Finding a counter example for $ \left(A+A\right)'\subseteq\left(A'+A\right)\cup\left(A'+A'\right)$
Apr
12
accepted Different definitions of limit points?
Apr
7
asked Different definitions of limit points?