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20140523
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#10

Thanks Rcolistete.
Speaking of the several mathematical tools you have been developping, do you plan on porting R to Sailfish? I remember being able to run my R scripts or do calculations in R using Easy Debian in Maemo 5, and it was very convenient. I don't remember if it was working on your Easy Debian version for Harmattan. Anyway, I think there is nothing on Sailfish yet, and R would be a very good integrated mathematical software where almost any calculation would be possible.
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* ordinary and partial derivatives from 1 to 3 variables;
* multiple derivatives;
* calculation of gradient, divergent, curl and laplacian in 3 dimensions and different coordinate systems (cartesian, cylindrical and spherical); (* Only on Maemo 4/5 for the moment *)
* 5 simplification methods for nonnumerical results;
* option to show the calculation time;
* option to show the not calculated derivative before the result;
* 7 output types : simple, bidimensional, LaTeX, (MathML), C, Fortran, (Javascript), (Python/SymPy);
* copy&paste available in all entry fields and also in the result, allowing copying the result to anywhere;
* history and line completion editing in the input expressions. (* Only on Maemo 4/5 for the moment *)
See the Derivative web site : http://www.robertocolistete.net/derivative/.
"Derivative" runs on :
 Sailfish OS with Python 3.4, SymPy 0.7.5 and Qt5/PyOtherSide (v0.6 released in 22/05/2014 at OpenRepos.net);
 Maemo 4 (Nokia N800/N810), Maemo 5 (Nokia N900) or any smartphone/tablet/computer where Python, SymPy and PyQt are available.
SymPy is a computer algebra system (CAS) written in pure Python, it is free and open source project, see http://sympy.org/. SymPy version 0.7.3 (14/07/2013) is available for Maemo 4 (Diablo) and Maemo 5 (Fremantle), and SymPy 0.7.5 for Python 2.7 and Python 3.x is available on Sailfish, see the SymPy thread in Talk Maemo.org.
On Sailfish :
On Maemo 5 :
On Maemo 4 :
On Maemo 5 :
Derivative v0.6 (22/05/2014) released.
Derivative v0.7 (26/05/2014) released.
Derivative for Sailfish OS uses Python 3 and PyOtherSide, so you need Sailfish v1.0.3.8 (31/01/2014) or newer (so they are in the official Jolla repositories).
Install Warehouse (OpenRepos.net client) for Sailfish OS, see the Jolla Tides guide with screenshots.
Then open Warehouse, search for "Derivative", enable the repository, then install it.
Derivative takes only 0.4 MB after installation, but its dependency (which is automatically installed) "python3sympy" (SymPy), if not installed, takes approx. 30 MB. Python 3 and PyOtherSide will also be installed if not already installed.
(16/10/2011)
Derivative v1.0.0 is available for Maemo 5 (Fremantle) in the extras repositories and Maemo.org Downloads :
* 1st public release for Maemo 4 Diablo and Maemo 5 Fremantle on extrasdevel/extrastesting/extras repository;
* using SymPy 0.7.1 (07/2011);
* time to load is approx. 16 seconds on Nokia N810 and 7 seconds on Nokia N900 @ 600 MHz.
(22/10/2011)
Derivative v1.0.2 for Maemo 4 (Diablo) is in extras repository as well as Maemo.org Downloads :
* depends on pythonsymPy_0.7.1maemo4 which fixes the missing dependency of python2.5dev on Maemo 4 Diablo;
* saves the last used coordinate system;
* uses 'Symplify terms' as the default simplification method.
For the users of Derivative v1.0.0 for Maemo 4, which was not running because of the missing python2.5dev dependency, the solution is :
 uninstall "Integral"/"Derivative"/"Limit" from the application manager (it will uninstall pythonsympy_0.7.1maemo3);
 update the application manager;
 install "Integral"/"Derivative"/"Limit" so that the new pythonsympy (and python2.5dev) will be installed.
The "About" dialog shows "In loving memory of my wife Lorena" because unfortunately she left this world in 19/09/2011.
Python, PyQt and SymPy will also be installed if not installed before.
"Derivative" is small (60 KB) but it installs "SymPy" (about 18.5 MB after install, with .pyc compiled Python files). "Derivative" and "SymPy" are optified on Maemo 5.
On Maemo 4 (Diablo) "Derivative" and its dependencies takes about 40 MB after install :
* SymPy (about 18.5 MB);
* python2.5dev for SymPy, about 15 MB after install;
* "ttfdejavu" (7,7MB after install) font because the Monospace font on Maemo 4 lacks many mathematical symbols for bidimensional output, so DejaVu Sans Mono is used.
For Maemo 5 users, please help promote "Derivative" (v1.0.0 promoted in 30/10/2011) to extras repository by voting in :
Derivative 1.0.01fremantle1
See also "Integral" and "Limit" for Maemo 4 & 5 & Sailfish, which calculate mathematical integrals and limits.
Python, C/C++, Qt and CAS developer. For Maemo/MeeGo/Sailfish :
Integral, Derivative, Limit  calculating mathematical integrals, derivatives and limits. SymPy  Computer Algebra System.
MatPlotLib  2D & 3D plots in Python. IPython  Python interactive shell.
 My blog about mobile & scientific computing 
Sailfish : Sony Xperia X, Gemini, Jolla, Jolla C, Jolla Tablet, Nexus 4. Nokia N9, N900, N810.
Last edited by rcolistete; 20140527 at 04:56. Reason: Derivative v0.7 for Sailfish released