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1619
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location Spain , Basque Country , Bilbao
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visits member for 3 years, 2 months
seen Nov 26 at 13:24

i got a degree on Physics and have several ideas on my own , unfortunately i do not have a physics sponsor :) in order to get an investigation grant :)


Nov
14
comment The limit of $ m\int_{a}^{1/m} \frac{dx}{x}=0 $ and $ m\int_{a}^{\infty} \frac{dx}{x^{1+m}}=0$ as $m\to0$
so the limit itself does not exist ?
Nov
14
comment The limit of $ m\int_{a}^{1/m} \frac{dx}{x}=0 $ and $ m\int_{a}^{\infty} \frac{dx}{x^{1+m}}=0$ as $m\to0$
$ m \to 0 4 sorry i forgot
Nov
14
comment Inhomogeneus recurrence relation $a_{n+1} = 2a_n+3^n+4^n$
fro 4 n \to \infty $ your difference equation becomes $ y'(x)=y(x)+3^{x}+4^{x} $ solve this and you will have an approximate solution
Nov
7
comment Inverse Laplace Transform of s^n
i thinks is more like $ (-1)^{n} \delta ^{n} (x) $$ the derivatives of delta function
Nov
6
comment zeta regularization separation of series
by curiosity what would happen with this identity if $ k=1 $
Nov
6
comment singular fnction involving gamma function
my probelm was most related to see if the derivatives of $$ \frac{\Gamma (z+1)}{\Gamma (z-2r+1)} $$ for m negative and r postive turned to be $\infty$
Nov
6
comment singular fnction involving gamma function
OK tahnks i need it for any formula involivng Euler-Maclaurin summation formula thanks Daniel :)
Jun
16
comment Numerical Methods for estimating divergence over an improper integral
expand the function into a Laurent series convergent whenever $ x<1 $ and antoher , wich is convergent $ x >1 $
Jun
6
comment Asymptotic of a sum evaluation as $ x \to \infty $
why not ?, what i have made wrong in my approximation
Jun
5
comment Solve the Sturm-Liouville problem $y'' + λy = 0$ given $y(0) = 0$, $y'(6) = 0$?
for the firste term the solution is $ y(X)=Asin( \sqrt{\lambda}x $ so $ B=0$ and $ y(0)=0 $ . The quantization condition comes from the secon equation $ y'(6)=0= \sqrt{\lambda}cos( \sqrt{\lambda} 6) $
May
30
comment $\psi(p_{n+1}) - \psi(p_n)$?
with the prime number theorem on mind $ \Psi (x) \to 0 $ so for big primes the different will be about $ \p_{n+1}-p_{n} $ but again in prime number theorem $ p_{n} \to nlog(n) $ so we have that $ S(p_{n}) \to 1+log(n) $
May
29
comment an implicit solution is valid to show that the solution exists??
wel if you lik put $ y^{-1}(x)=x(y)$ but i have always written this way with the minus 1
May
29
comment an implicit solution is valid to show that the solution exists??
i have said that the solution to a certain differential equation $ y^{-1}(x)=x+g(X) $ but g(x) is known the unknon is $ y(x) $
May
29
comment Euler product for Riemann zeta and analytic continuation
the question IS : can we use borel transform to make an analytic continuation of the Euler product ?
May
26
comment Gram's series for integral equation
if someone wants to look my solution of the integral equation of first kind vixra.org/abs/1304.0013 i extend GRAM SERIES to other integral equations as well
May
26
comment Integral equation solution in power series
i know how to solve it with the foruier tranfsorm of course i was asking if there is another method to solve this integral equation for example by power series
May
24
comment If $tf(t)=tg(t)$, where $f(t), g(t)$ are distributions, then $f(t)=g(t)+\lambda \delta (t)$
$ t\delta (t) = 0 $ for every 't' this is why the operator are equal up to a delta function
May
23
comment Is it possible that $\pi$ is finite in other numerical bases?
PI is an integer in basis $ \Pi $ by trivial definition and if we allow non integer basis
May
23
comment Is a proof still valid if only the writer understands it?
a TRUTH is a truth even if only a person understand
May
21
comment orthogonal polynomials and quadrature formulae
OK thanks good point