- September 25th, 2019, 12:50 pm
- Forum: Politics Forum
- Topic: UK and the EU: In or out?
- Replies:
**2196** - Views:
**100615**

Das Matterhorn ist das Wahrzeichen der Schweiz.

- September 22nd, 2019, 5:15 pm
- Forum: Brainteaser Forum
- Topic: inequality (a quickie)
- Replies:
**18** - Views:
**41522**

Computing the gradient find the minimum or the maximum of the function. We are looking for a minimum (of a positive function).

- September 22nd, 2019, 4:32 pm
- Forum: Brainteaser Forum
- Topic: inequality (a quickie)
- Replies:
**18** - Views:
**41522**

We can split the problem. The firs part, just use the arithmetic and geomtric mean inequality ([$] (x_1 + x_2 + x_3) \geq 3 \sqrt[3] {x_1 x_2 x_3} [$]) with [$] x_1 = \frac{x^2}{y z}, x_2= \frac{y^2}{x z}, x_3 = \frac{x^2}{x y} [$] then use the cubic root of the inequality to obtain the first part....

- September 12th, 2019, 1:53 pm
- Forum: Programming and Software Forum
- Topic: Do you agree with Yann LeCun about Deep Learning being dead and "Differentiable programming" being the next hot thing in
- Replies:
**11** - Views:
**3346**

Well, Lyness & Moler (1967) were the first to use the complex variables to develop estimates for derivatives.

This pionnering work led Squire & Trapp (1998) to develop the complex step method for estimating the first derivative.

This pionnering work led Squire & Trapp (1998) to develop the complex step method for estimating the first derivative.

- September 12th, 2019, 12:56 pm
- Forum: Programming and Software Forum
- Topic: Do you agree with Yann LeCun about Deep Learning being dead and "Differentiable programming" being the next hot thing in
- Replies:
**11** - Views:
**3346**

Well, Agnieszka is right. What I said is that CSM was used in large scale computing framework in CFD (that's was in the late 90'/early 2000).

- September 12th, 2019, 8:23 am
- Forum: Programming and Software Forum
- Topic: Python tricks
- Replies:
**234** - Views:
**39057**

Looking to source code, you can also see how to use SWIG to interface the C library to python.

If possible, I always install "packages" from source code. That's a good practise I learned working on Linux.

If possible, I always install "packages" from source code. That's a good practise I learned working on Linux.

- September 11th, 2019, 7:13 pm
- Forum: Programming and Software Forum
- Topic: Python tricks
- Replies:
**234** - Views:
**39057**

If you check the source code on github, it expects a double as an output for the function. If not, it will throw an invalid argument error message.

- September 9th, 2019, 7:06 pm
- Forum: Technical Forum
- Topic: DL and PDEs
- Replies:
**168** - Views:
**26116**

It is in development (I would say in its enfancy) and expected to use Quantlib

- September 5th, 2019, 2:36 pm
- Forum: Politics Forum
- Topic: Boris Johnson - the last 100 days
- Replies:
**199** - Views:
**21465**

What does it change if he was British (even Etonian)? (I don't imagine being Russian)The main person on the other side is German.

- September 4th, 2019, 7:17 pm
- Forum: Programming and Software Forum
- Topic: Python tricks
- Replies:
**234** - Views:
**39057**

my everything editor is emacs. The (right) tabing is done automagically through plugins.

For python, I use Tim Peters plugin available here https://launchpad.net/python-mode

For python, I use Tim Peters plugin available here https://launchpad.net/python-mode

- August 30th, 2019, 6:59 pm
- Forum: Technical Forum
- Topic: If you are bored with Deep Networks
- Replies:
**501** - Views:
**35381**

anonymous quote --> Jean-Marc?

- August 28th, 2019, 6:52 pm
- Forum: Off Topic
- Topic: Stupid question of the day
- Replies:
**2121** - Views:
**128536**

There were some changes in newer versions of scipy. Use PPoly instead.

- August 26th, 2019, 7:46 pm
- Forum: Technical Forum
- Topic: If you are bored with Deep Networks
- Replies:
**501** - Views:
**35381**

They shared the (python) source code here: https://github.com/google-research/data-driven-pdes

There is also a tutorial (python notebook) here: Advection diffusion tutorial

There is also a tutorial (python notebook) here: Advection diffusion tutorial

- August 20th, 2019, 7:09 pm
- Forum: Forum and Website Bugs and Suggestions
- Topic: Is latex working?
- Replies:
**7** - Views:
**3909**

[$] \frac{\partial V}{\partial t} + \frac{1}{2} \sigma^2 S^2 \frac{\partial^2 S}{\partial S^2} + r S \frac{\partial V}{\partial S} - r V = 0 [$]

- August 2nd, 2019, 3:34 pm
- Forum: Brainteaser Forum
- Topic: exp(5) = [$]e^5[$]
- Replies:
**544** - Views:
**112890**

Check here for comparaison, Daniel: http://spfrnd.de/posts/2018-03-10-fast-exponential.html

GZIP: On