2,739 reputation
2336
bio website ephorie.de
location Germany
age 44
visits member for 4 years, 6 months
seen yesterday

just an amateur fascinated by math


Mar
8
comment Intuition and counterexamples for higher-order derivative test
Thank you Daniel: $x^{12}$ doesn't answer my question concerning an intuition. Even $x^4$ would work as an example, this is not the problem.
Mar
8
asked Intuition and counterexamples for higher-order derivative test
Feb
25
reviewed Approve How do I solve $y'=\frac{y}{x}\frac{x-y}{x+y}$?
Feb
25
reviewed Approve Integral equation and constant rules
Feb
25
reviewed Approve Factoring $x$ out of the denominator of a limit
Feb
25
reviewed Approve How come we ignore constants when finding derivatives?
Feb
16
reviewed Approve If a function $f$ is continuous in $[a,∞)$ and finite $\lim_{x→+∞}⁡f(x)$ exists, then it's uniformly continuous in $[a,+∞)$.
Feb
16
reviewed Approve If f: $[0,\infty)\to \mathbb{R}$ is continuous and uniformly continuous in $[k,\infty]$, then it's uniformly continuous in $[0,\infty]$.
Jan
27
reviewed Approve $n$ balls of $2^{n}-1$ colors, order not significant, how many combinations?
Jan
26
reviewed Approve Does this function define an inner product?
Jan
26
reviewed Approve A subgroup has the same number of left and right cosets - Tricks - Fraleigh p. 103 10.32, 35
Jan
25
accepted How to ensure that you haven't run into a paradox proving a theorem e.g. by proof by contradiction?
Jan
24
reviewed Approve Why Q is not locally compact, connected, or path connected?
Jan
24
comment How to ensure that you haven't run into a paradox proving a theorem e.g. by proof by contradiction?
Thank you, looks promising!
Jan
24
reviewed Approve Classifying singularity
Jan
24
comment How to ensure that you haven't run into a paradox proving a theorem e.g. by proof by contradiction?
@TimSeguine: But there still remains the possibility that when you assume the negation and again arrive at a contradiction that your axiom system is faulty (see Zermelo-Russell paradox), so the question remains: How to ensure that you haven't run into a paradox proving a theorem?
Jan
24
asked How to ensure that you haven't run into a paradox proving a theorem e.g. by proof by contradiction?
Jan
8
reviewed Approve Prove that $\lim_{n\to\infty}\left[1-\prod_{i=1}^{n} (1-\frac{a}{i} )\right]= 1$.
Dec
30
awarded  Custodian
Dec
30
reviewed Approve Systems of linear equations to calculate $\alpha$ and $\beta$