Reputation
Next tag badge:
381/400 score
111/80 answers
Badges
10 145 287
Newest
 Revival
Impact
~1.4m people reached

10h
answered Find constant $c < 1$, such that Fibonacci number $F(n) \le 2^{cn}$ for every $n \ge 0$
10h
comment Find constant $c < 1$, such that Fibonacci number $F(n) \le 2^{cn}$ for every $n \ge 0$
Why does "Wikipedia" link to youtube?
11h
comment Principle of Transfinite Induction
In short: In PTI the condition on $P$ says that there cannot be a minimal counterexample. But a nonempty subset of a well-ordered set always has a minimum. Hence the set of counterexamples must be empty, i.e., $P$ holds throughout. - And ordinals are in a way just the standard examples of well-ordered sets
11h
answered Converges to 0 vs. Diverges to 0; Terminology in p-adic Analysis
11h
answered Is there something between summation and integration?
17h
answered Proving that a real number is a non-negative integer.
17h
comment Proving that a real number is a non-negative integer.
... and do $P,Q$ contain all or possibly just some of the primes dividing $n\pm k$?
1d
revised Is there any algorithm or something to solve $\phi\left(x\right)=n$
added 1097 characters in body
1d
answered Is there any algorithm or something to solve $\phi\left(x\right)=n$
1d
awarded  Revival
1d
answered What is the domain of the function
1d
comment Is there something interesting about $373857714078$?
Does "blohillsbele" mean anything? At least that's the word you get by "turning the calulator"
1d
comment Associativiy of product law in $R^S$ ($R$ ring, $S$ a monoid with condition)
It should be $\gamma_w$, not $\gamma_t$ in the first sum
1d
comment Probability of hitting numbers 1 - 12 on a single zero roulette wheel
Actually $\frac{12}{37}<\frac13$
1d
answered What unit is the first derivative of a quadratic Bézier curve expressed in?
1d
comment How do I prove this assertion?
Use the diagonal argument
1d
answered If a set $E\subset \Bbb{R}^n$ is closed and open, then it is either $\Bbb{R}^n$ or $\emptyset$.
1d
answered The Stabilizer of the coset for the action of G on $G/H$ by left multiplication.
1d
comment If $f=u+iv:D\to \Bbb C$ is analytic on a domain D, is then the curves $u(x,y)=c_1$ and $v(x,y)=c_2$ intersect orthogonally?
Have a look at $f(z)=z^2$ and $c_1=c_2=0$. In what angles do your curves intersect and are they curves in the first place?
1d
comment If $f=u+iv:D\to \Bbb C$ is analytic on a domain D, is then the curves $u(x,y)=c_1$ and $v(x,y)=c_2$ intersect orthogonally?
... if they intersect at all