Updates:
Status: Fixed
Labels: -NeedsReview
Comment #2 on issue 4128 by skirpic...@gmail.com: fix comparisons oo/zoo
with complex numbers, e.g. ooI
http://code.google.com/p/sympy/issues/detail?id=4128
(No comment was entered for this change.)
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On Saturday, January 11, 2014 2:13:38 AM UTC+1, Aaron Meurer wrote:
In Chrome, I get 0.55566757; in Firefox I get 2.4737711. I
also tried Safai 7.0.1 (I get 4.6381144) and Opera because you
mentioned it (version 12.16, I get 4.4440572).
So maybe Chrome beta already has
Currently one must do the following
```
Ric
Riem(L_0, -d1, -L_0, -d3)
R = (Ric(d0, d1)*g(-d0, -d1)).contract_metric(g)
R
Riem(L_0, -L_1, -L_0, L_1)
```
One cannot write
```
Ric(d1, -d1)
Riem(L_0, d1, -L_0, -d1)
```
I think this is a bug; the Einstein summation convention is assumed, so if
I think I will add a warning in TensMul's docstring about this possible
issue.
By the way, Krastanov already pointed out an example on how to deal with
General Relativity with the diffgeom module. That is an interesting
approach, I wish one day we could have tensor and diffgeom to easily
On Saturday, January 11, 2014 2:49:16 AM UTC+1, David Li wrote:
@F.B. have you managed to compile Python using Emscripten? I tried but
could not get the interpreter working, it just hung/crashed if I tried to
bundle the standard library and complained about site.py otherwise.
No, I
Thanks so much for your help. I looked into kivy and went through its
tutorials and API docs. I think it is a good way to build a python app for
sympy . Also we can then port it onto android as well as iOS platforms. I
have started work on it.
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You received this message because you are
Thanks for this. So, we are trying to convert something like `[(x, x
0), (-x , x =0)]` to `[(x, (0, oo) ), (-x, (-oo, 0] ) ]`. I wrote a
small script to try it out for univariate functions
```
def to_expr_set(p, input_set=None):
if input_set is None:
U = Interval(-oo, oo) # U:
On Saturday, January 11, 2014 10:04:03 AM UTC+1, mario wrote:
I think this is a bug; the Einstein summation convention is assumed, so if
the substitution
indices are (d1, -d1) it should give the contracted tensor.
We already discussed this problem, regarding *substitute_indices( )*:
On Saturday, January 11, 2014 4:04:03 AM UTC-5, mario wrote:
Currently one must do the following
```
Ric
Riem(L_0, -d1, -L_0, -d3)
R = (Ric(d0, d1)*g(-d0, -d1)).contract_metric(g)
R
Riem(L_0, -L_1, -L_0, L_1)
```
One cannot write
```
Ric(d1, -d1)
Riem(L_0, d1, -L_0, -d1)
```
On Saturday, January 11, 2014 6:56:06 PM UTC+1, Comer wrote:
In [*3*]: run RiemRicREinstein.py
File /Users/comerduncan/sympytensor/RiemRicREinstein.py, line 52
G(a,b) = Ric(a,b) -gR
SyntaxError: can't assign to function call
So, what's the problem? I should be able to
On Saturday, January 11, 2014 1:09:05 PM UTC-5, F. B. wrote:
On Saturday, January 11, 2014 6:56:06 PM UTC+1, Comer wrote:
In [*3*]: run RiemRicREinstein.py
File /Users/comerduncan/sympytensor/RiemRicREinstein.py, line 52
G(a,b) = Ric(a,b) -gR
SyntaxError: can't assign to
On Saturday, January 11, 2014 7:26:51 PM UTC+1, Comer wrote:
I do have another question or two...
I see the .data method. What is really needed is the ability to create
data arrays constructed from symbols, indeed functions of various local
coordinates. So far I have only seen
On Sat, Jan 11, 2014 at 1:49 AM, Janwillem van Dijk
jwe.van.d...@gmail.com wrote:
Ondřej, I did send you my complete 900 lines scripts to show the problem and
did not think of making a very simple demo; here it is:
But it doesn't help the rest of us if you only send your script to Ondrej.
On Saturday, January 11, 2014 2:04:23 PM UTC-5, F. B. wrote:
On Saturday, January 11, 2014 7:26:51 PM UTC+1, Comer wrote:
I do have another question or two...
I see the .data method. What is really needed is the ability to create
data arrays constructed from symbols, indeed functions
On Saturday, January 11, 2014 3:30:40 PM UTC-5, Comer wrote:
On Saturday, January 11, 2014 2:04:23 PM UTC-5, F. B. wrote:
On Saturday, January 11, 2014 7:26:51 PM UTC+1, Comer wrote:
I do have another question or two...
I see the .data method. What is really needed is the ability
On Saturday, January 11, 2014 9:35:52 PM UTC+1, Comer wrote:
Now I am trying to create the Weyl tensor. Here is what I do and the
response:
W = tensorhead('W',[Lorentz]*4,[[2, 2]])
This definition is useless, it gets overridden later.
terma =
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