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by ExSan
December 29th, 2018, 6:44 pm
Forum: Off Topic
Topic: Nouvelles de France
Replies: 2249
Views: 81438

Re: Nouvelles de France

"there was no sex in Ireland before television".[
Oliver J. Flanagan
:D - nice!
by ExSan
December 20th, 2018, 10:10 pm
Forum: Numerical Methods Forum
Topic: Asymptotic behaviour of ODE/PDE (large time)
Replies: 21
Views: 687

Re: Asymptotic behaviour of ODE/PDE (large time)

My post was deleted. So I am not allowed to show you how to bypass a paywall.
what do you mean?
by ExSan
December 20th, 2018, 10:03 pm
Forum: Off Topic
Topic: Israel, land of milk and honey
Replies: 835
Views: 27549

Re: Israel, land of milk and honey

OK, pity :) So what you mean by "Me too !!!"?? like many others, ExSan (and Australia) recognizes that Jerusalem is the capital of Israel You are getting the run of yourself. You could call it Exsan's BREAKING NEWS :D Besides, it's West Jerusalem, East for Palestine.    :D ExSan's Breaking News!!! 
by ExSan
December 17th, 2018, 7:43 pm
Forum: Off Topic
Topic: Israel, land of milk and honey
Replies: 835
Views: 27549

Re: Israel, land of milk and honey

 why I should move? If I am very comfortable where I am 
by ExSan
December 15th, 2018, 12:29 pm
Forum: Brainteaser Forum
Topic: exp(5) = [$]e^5[$]
Replies: 532
Views: 97186

Re: exp(5) = [$]e^5[$]

Wed Dec 05, 2018 1:11 pm Let's take a step backwards. Gradient descent methods as we know and love them are nothing more than Euler's (ugh) method applied to ODEs (aka gradient system ): [$]dx/dt = - grad f(x) = -\nabla f(x)[$] where [$]f[$] is the function to be minimised. The local minima of [$]f...
by ExSan
December 5th, 2018, 10:56 am
Forum: Brainteaser Forum
Topic: exp(5) = [$]e^5[$]
Replies: 532
Views: 97186

Re: exp(5) = [$]e^5[$]

Compute [$]e^{\pi}[$] to 2 decimal places with pencil and paper. ( Gelfond's constant ) A follow-on from Exsan's post and ansatz (big conjecture but in the right direction)  is whether [$]\pi[$] and [$]e[$] are algebraically independent? i.e. is there a polynomial relation [$]a_{n}\pi^{n} + a_{n-1}...
by ExSan
December 4th, 2018, 10:48 am
Forum: Off Topic
Topic: A Music Game II for 2009
Replies: 2807
Views: 289745

Re: A Music Game II for 2009

by ExSan
December 1st, 2018, 11:01 am
Forum: Off Topic
Topic: Earthquake
Replies: 25
Views: 31498

Re: Earthquake

"  low-frequency “ring”"   The Bell is ringing globally! Indeed it is. I hate earthquakes!   Probably most of you  have never gone through any earthquake. Since my childhood I know what an earthquake is like. I have clear in my mind what is a 6.1 and 6.7 . Thanks God epicenter where several Km. fro...
by ExSan
November 30th, 2018, 12:18 pm
Forum: Programming and Software Forum
Topic: C++ quiz - Maths and acccuracy
Replies: 530
Views: 31403

Re: C++ quiz - Maths and acccuracy

Image
Exactly that is the solution JDC gives. I guess this is the formula should be used always in computational calcs to trust the output.
by ExSan
November 29th, 2018, 1:45 pm
Forum: Programming and Software Forum
Topic: C++ quiz - Maths and acccuracy
Replies: 530
Views: 31403

Re: C++ quiz - Maths and acccuracy

In regard of the " C++ quiz - Maths and acccuracy " I found this  The quadratic formula and low-precision arithmetic    one of the roots is wrong I coded the problem in C /***********START***************/ void quad(double a, double b, double c, double & x1, double & x2 ){ double r = sqrt(b*b - 4 * a...
by ExSan
November 8th, 2018, 10:12 pm
Forum: Off Topic
Topic: are you ready for some football ?
Replies: 21
Views: 23134

Re: are you ready for some football ?

by ExSan
November 5th, 2018, 10:21 pm
Forum: Off Topic
Topic: are you ready for some football ?
Replies: 21
Views: 23134

Re: are you ready for some football ?

La Final de la Copa Libertadores sera 
Boca vs. River  El fútbol latinoamericano en su máxima expresión
Dos fechas Noviembre 10 y 24.
by ExSan
October 25th, 2018, 10:40 pm
Forum: Brainteaser Forum
Topic: exp(5) = [$]e^5[$]
Replies: 532
Views: 97186

Re: exp(5) = [$]e^5[$]

Compute [$]e^{\pi}[$] to 2 decimal places with pencil and paper. ( Gelfond's constant ) A follow-on from Exsan's post and ansatz (big conjecture but in the right direction)  is whether [$]\pi[$] and [$]e[$] are algebraically independent? i.e. is there a polynomial relation [$]a_{n}\pi^{n} + a_{n-1}...
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