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Jun
25
awarded  Popular Question
Jul
2
awarded  Curious
Mar
21
comment Perfect correlation coefficient
Thanks! it gives exactly one as desired. You can post is as an answer, if you would
Mar
21
asked Perfect correlation coefficient
Dec
14
comment can an arbitrary set be.always embedded in other set?
It clearly says no specified, not don't asume any model.
Dec
14
revised can an arbitrary set be.always embedded in other set?
added 63 characters in body
Dec
14
asked can an arbitrary set be.always embedded in other set?
Sep
28
comment Incomplete gamma function
Thanks. Actually I was interested in an analytic formula, we're not going to do numerical work as fas as I know. I found that $$y^{8}\sum_{n=0}^{\infty}\frac{y^{n}}{(n+8)!}=e^{y}-\sum_{n=0}^{7}\frac{y^{n}}{‌​n!} $$
Sep
27
revised Incomplete gamma function
added 75 characters in body
Sep
27
asked Incomplete gamma function
Sep
25
awarded  Yearling
Jul
17
answered “Fixed $k$” in Mathematical Induction
Jul
11
revised How to simplify a sum with factorial?
k^2 instead of 2^k typo
Jul
11
suggested approved edit on How to simplify a sum with factorial?
Jul
10
comment Infinite composition of functions
Thank you, that made it more clear. I accepted Gottfried's answer instead of yours because of the reference recommendations, however I'm very grateful for your answer and comments.
Jul
10
comment Infinite composition of functions
Thank you for your fast comment. So your question is, if the range of $f_{n}=R_{n}$ then what is $\displaystyle \bigcap_{i \in \mathbb{N}}R_{i}$? I see more or less naively now that it should be the empty set, but I don't see how to formalize it.
Jul
10
accepted Infinite composition of functions
Jul
10
comment Infinite composition of functions
I don't see how the range of $f^{n}(x)$ tends to the empty set as $n \to \infty$
Jul
10
asked Infinite composition of functions
Jul
4
revised Determine variable vector compontent so vectors are independent
edited LaTeX