[yt-dev] Fwd: [sympy] SymPy 1.1 is released

[Nathan Goldbaum]

The last time I checked (last year) SymEngine doesn't support assumptions
on Symbol objects.

Unfortunately we really need the Positive assumption, otherwise units like
sqrt(g^2) won't simplify.

I'll check in with the SymEngine people next week at SciPy to see what
progress has been made on that.

On Thu, Jul 6, 2017 at 3:21 PM, Matthew Turk <matthewturk at gmail.com> wrote:

> Hi Nathan,
>
> Have you tried out SymEngine with it?
>
> On Thu, Jul 6, 2017 at 3:18 PM, Nathan Goldbaum <nathan12343 at gmail.com>
> wrote:
> > Hi all,
> >
> > I tested yt with the release candidate and didn't run into any issues.
> We're
> > using very stable parts of the sympy API so I'm not expecting breakage.
> That
> > said, if anyone notices issues related to this please let me know and I
> will
> > fix ASAP.
> >
> > -Nathan
> >
> > ---------- Forwarded message ----------
> > From: Aaron Meurer <asmeurer at gmail.com>
> > Date: Thu, Jul 6, 2017 at 3:15 PM
> > Subject: [sympy] SymPy 1.1 is released
> > To: "sympy at googlegroups.com" <sympy at googlegroups.com>
> >
> >
> > I'm happy to announce that SymPy 1.1 has been released. You can install
> it
> > with
> >
> >     pip install -U sympy
> >
> > It also be available via conda soon.
> >
> > This is a major release of SymPy, with many major changes since the
> > previous version, 1.0. The release notes are at
> > https://github.com/sympy/sympy/wiki/Release-Notes-for-1.1 (note, at
> > the time of this writing, these are still being updated).
> >
> > Please report any bugs you find in our issue tracker
> > https://github.com/sympy/sympy/issues
> >
> > Some highlights (if I am missing anything major, please let me know
> > and update the release notes page):
> >
> > - Many improvements to code generation, including addition of
> > tensorflow (to lambdify), C++, llvm JIT, and Rust language support, as
> > well as the beginning of AST classes.
> >
> > - Experimental support for SymEngine as a symbolic core in the
> > sympy.physics.mechanics module (set the environment variable
> > USE_SYMENGINE=1).
> >
> > - A reworking of the internals of the matrices module.
> >
> > - Several bug fixes for floating point numbers using higher than the
> > default precision.
> >
> > In addition, several improvements from the 2016 Google Summer of Code
> > projects, including:
> >
> > - A new holonomic submodule, for computing with holonomic functions
> > (Shubham Tibra's GSoC project).
> >
> > - Improvements to the group theory module (Gaurav Dhingra's GSoC
> project).
> >
> > - Improvements to the solvers and solveset (Shekhar Prasad Rajak and
> > Kshitij Saraogi's GSoC projects).
> >
> > - Implementation of Singularity Functions to solve Beam Bending
> > problems (Sampad Kumar Saha's GSoC project).
> >
> > - Improvements to the mechanics module (James Brandon Milam's GSoC
> project).
> >
> > Thank you to everyone who contributed to this release. A full list of
> > people who contributed is at
> > https://github.com/sympy/sympy/wiki/Release-Notes-for-1.1#authors. A
> > total of 184 people contributed to this release. Of these, 143 people
> > contributed to SymPy for the first time for this release.
> >
> > Aaron Meurer
> >
> > --
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