Binomial Sum

Conteggi, probabilità, invarianti, logica, matematizzazione, ...
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maxpower
Messaggi: 9
Iscritto il: 06 ago 2009, 19:20

Binomial Sum

Messaggio da maxpower »

Evaluate $ \displaystyle \sum_{n} x^n \binom{2n}{n}\binom{l}{n} $ where n and l are natural numbers
J. Max Power
maxpower
Messaggi: 9
Iscritto il: 06 ago 2009, 19:20

Messaggio da maxpower »

gosh.. maybe I forgot the original question: it cannot be this!
J. Max Power
Tibor Gallai
Messaggi: 1776
Iscritto il: 17 nov 2007, 19:12

Messaggio da Tibor Gallai »

You forgot way more than that.
[quote="Pigkappa"]Penso che faresti un favore al mondo se aprissi un bel topic di bestemmie da qualche parte in modo che ti bannino subito.[/quote]
maxpower
Messaggi: 9
Iscritto il: 06 ago 2009, 19:20

sonata

Messaggio da maxpower »

Ah!
I must repair someway. But I cannot delucidate here where this stupid question originated, it would be tremendously OT.
By the way, there is no path now to come out from this vacuum.
I'll try to hypnotize you with this, in the hope that nobody already knows it.
Then listen to that player.
Well; now you are in my power! therefore I can explain you the whys of the question without you being able to recognise the OT situation.
Say yes with your head
good job, dear.
Right, the sum comes out if you try to determine in the path integral perturbation theory the eigenvalues of the hamiltonian with a potential $ \frac{1}{2}(\omega^2q^2+\lambda^2 q^2) $ as a function of $ \lambda $. I never used such tools, so I believed it would give me the trivial exact result; three years of physics built such a confusion about simple mathematics that I thought the sum should have the expected simple result.. here is the argument (page 3).

Did you hear the wrong note? Poor Pius
J. Max Power
Tibor Gallai
Messaggi: 1776
Iscritto il: 17 nov 2007, 19:12

Messaggio da Tibor Gallai »

It's not cool to do maths when you're high on crack. :?
[quote="Pigkappa"]Penso che faresti un favore al mondo se aprissi un bel topic di bestemmie da qualche parte in modo che ti bannino subito.[/quote]
maxpower
Messaggi: 9
Iscritto il: 06 ago 2009, 19:20

Messaggio da maxpower »

Tibor Gallai ha scritto:It's cool to do maths when you're high on crack. 8)


Oh.. How I agree babe!
J. Max Power
EvaristeG
Site Admin
Messaggi: 4928
Iscritto il: 01 gen 1970, 01:00
Località: Roma
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Messaggio da EvaristeG »

As I don't see nor a sensible mathematical question neither any semblance of seriousness in this thread, I'll close it.

I warmly invite you, dear maxpower, to stop posting such nonsenses; however, if you want to participate actively in our discussions, you'll be mostly welcome (even if the language used in this forum usually is Italian).
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