On 17 Set, 23:03, Yann yannlaiglecha...@gmail.com wrote:
If I try this, here is what I get:
sage: var('a')
a
sage: integral(cos(2*x)/(x^2+a^2),x,-Infinity,+Infinity)
ERROR: An unexpected error occurred while tokenizing input
...
TypeError: Computation failed since Maxima requested
x = var(x)
d = function(d,x)
diff(x, d)
output:
Traceback (click to the left of this block for traceback)
...
TypeError: argument symb must be a symbol
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Hi again,
I hope you don't mind me bumping this thread one more time. I started
experimenting with trying a few things for fast arbitrary precision
computations using Cython. Above it was suggested to use MPFR
directly, so without the RealNumber wrapper, as the fastest way. Here
is a bit of code
http://localhost:8000 -- Works, thanks.
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x does not need declaration, it is declared automatically
Robert
On 18 zář, 09:08, sps debernasave...@libero.it wrote:
On 17 Set, 23:03, Yann yannlaiglecha...@gmail.com wrote:
If I try this, here is what I get:
sage: var('a')
a
sage:
Le 18/09/2010 16:31, KvS a écrit :
Hi again,
I hope you don't mind me bumping this thread one more time. I started
experimenting with trying a few things for fast arbitrary precision
computations using Cython. Above it was suggested to use MPFR
directly, so without the RealNumber wrapper, as
http://trac.sagemath.org/sage_trac/ticket/9945 needs review.
On Fri, Sep 17, 2010 at 8:28 PM, Robert Bradshaw
rober...@math.washington.edu wrote:
Oops. I'll post a fix.
On Fri, Sep 17, 2010 at 12:42 PM, kcrisman kcris...@gmail.com wrote:
On Sep 17, 2:30 pm, Alex Lara lrodr...@gmail.com
On Sep 18, 12:52 pm, ma...@mendelu.cz ma...@mendelu.cz wrote:
x does not need declaration, it is declared automatically
Robert
It's still good practice to do it, just in case x was defined in some
other way earlier in the session :)
- kcrisman
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On 09/18/2010 08:31 PM, kcrisman wrote:
On Sep 18, 12:52 pm, ma...@mendelu.cz ma...@mendelu.cz wrote:
x does not need declaration, it is declared automatically
It's still good practice to do it, just in case x was defined in some
other way earlier in the session :)
Or with 'sage -c', where
On Sep 18, 6:20 am, alien308 alien3...@gmail.com wrote:
x = var(x)
d = function(d,x)
diff(x, d)
Did you intend to differentiate x with respect to d? The error
message is totally unhelpful, though presumably this derivative
doesn't make sense 'as is'.
If you instead do
sage: diff(d,x)
Actually, the subject of your email now makes a little more sense.
But I don't think that one can define an inverse function quite this
easily! That would indeed be *very* obscure notation! I don't know
if we can define a symbolic inverse of this kind yet, or whether that
would even be easy -
Thanks.
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