I am trying to understand how to use Quaternions within sagemath to
replicate Lorentz transforms.
In other words, Lorentz transforms are rotations within a 4D spacetime and
I need to understand how they can be expressed in terms of quaternions.
I looked up examples of quaternions usage and they s
You say: "hijack vs shut up, which one is more serious? Accusing
someone hijacking something is a very serious accusation."
I certainly didn't mean it as a 'very serious accusation' like
hijacking people or planes. I used the term "hijacked" as a
technical term like it is defined in the urban d
On Monday, November 19, 2018 at 5:32:39 AM UTC-8, Kolen Cheung wrote:
>
> And if anyone has language issue it surely is OP. hijack vs shut up, which
> one is more serious? Accusing someone hijacking something is a very serious
> accusation.
Since you asked what kind of community this is, from
On Mon, 19 Nov 2018 at 13:45, Dima Pasechnik wrote:
>
>
> On Monday, November 19, 2018 at 1:14:38 PM UTC, Kolen Cheung wrote:
>>
>> "shut up" is language issue? You dont know whats bad language.
>
>
> I bet I can swear in more languages than you do: English, Russian, Dutch,
> German, Ukrainian, P
On Monday, November 19, 2018 at 1:14:38 PM UTC, Kolen Cheung wrote:
>
> "shut up" is language issue? You dont know whats bad language.
I bet I can swear in more languages than you do: English, Russian, Dutch,
German, Ukrainian, Polish, Yiddish, French, Italian...
And when I worked in Singapor
And if anyone has language issue it surely is OP. hijack vs shut up, which one
is more serious? Accusing someone hijacking something is a very serious
accusation.
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*can't
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If one don't have an authority to dictate, why can't he told to be shut up?
Instead ask him to continue to dictate? What kind of community is this?
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Snd if someone say something trying to dictate what can or cannot be asked
without backing up with an authority to dictate (such as a guideline), he
should really shut up literally and I wonder why this is a 'language issue".
Did you guys not literally means shut up when you say shut up? Do you
And do point out where's the guideline saying I can ask follow up questions
like this.
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Do ban me if you think "shut up" is language issue. It must be a joke.
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How's your behavior so good? you are a selfish guy that only want to consumea
others time and ask question and cannot stand people asking following up
question on the same piece of code. You should really have shutted up and may
be mark it as spam but not speak up.
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"shut up" is language issue? You dont know whats bad language.
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To post
On Mon, Nov 19, 2018 at 12:53 PM Kolen Cheung wrote:
>
> And if anyone is dictating this, that one is surely not you, even if you're
> the OP. Shut up.
Language!!! You might get banned for this...
>
> On Monday, November 19, 2018 at 4:43:44 AM UTC-8, Peter Luschny wrote:
>>
>> > Hi, I’m trying
Kolen Cheung:
>
> And if anyone is dictating this, that one is surely not you, even if
> you're the OP. Shut up.
>
You reconfirm the obvious, namely that you cannot behave.
> On Monday, November 19, 2018 at 4:43:44 AM UTC-8, Peter Luschny wrote:
>>
>> > Hi, I’m trying to translate this Sage sy
And if anyone is dictating this, that one is surely not you, even if you're
the OP. Shut up.
On Monday, November 19, 2018 at 4:43:44 AM UTC-8, Peter Luschny wrote:
>
> > Hi, I’m trying to translate this Sage syntax to Python syntax (i.e.
> using sage as a Python library.) But I got stuck even on
Because I use exactly the code shown here as an example. And I did open a
thread posting a direct question on how to use sage as a library but the
question is too general. So I figure I should use an example and so happen
I saw this thread with an interesting example.
So this is not hijack. And
> Hi, I’m trying to translate this Sage syntax to Python syntax (i.e. using
sage as a Python library.) But I got stuck even on the first command.
Why do you hijack this thread with a completely different topic?
I'm sure that your question and the answers of the experts are of
interest to many,
But if you're reading carefully this isn't what I'm asking.
On Monday, November 19, 2018 at 12:30:22 AM UTC-8, Dima Pasechnik wrote:
>
> Sage uses a preparer to translate things like R.=QQ[] into usual Python
> R=PolynomialRing(...).
>
> In the library code the preparer is not used.
>
>
> On Mon,
Sage uses a preparer to translate things like R.=QQ[] into usual Python
R=PolynomialRing(...).
In the library code the preparer is not used.
On Mon, 19 Nov 2018 03:13 Kolen Cheung Hi, I’m trying to translate this Sage syntax to Python syntax (i.e. using
> sage as a Python library.) But I got st
Hi, I’m trying to translate this Sage syntax to Python syntax (i.e. using
sage as a Python library.) But I got stuck even on the first command.
In Sage,
>>> R. = QQ[]>>> type(R)
Then I thought I can import it in Python like this:
import sage.rings
# OK
sage.rings.polynomial.polynomial_rin
merci beaucoup!
Peter
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On Fri, Sep 14, 2018 at 9:00 AM, Peter Luschny wrote:
> How can I speed up this computation?
>
> H. = QuaternionAlgebra(SR, -1, -1)
Do NOT use SR. Instead use QQ(x). Then it is 100x faster than Mathematica...
R. = QQ[]
K = R.fraction_field()
H. = QuaternionAlgebra(K, -1, -1)
def Q(a, b, c,
How can I speed up this computation?
H. = QuaternionAlgebra(SR, -1, -1)
def Q(a, b, c, d): return H(a + b*i + c*j + d*k)
def P(n): return Q(x+1,1,1,1)*P(n-1) if n > 0 else Q(1,0,0,0)
def p(n): return P(n)[0].list()
for n in (0..20): print [n], p(n)
[0] [1]
[1] [1, 1]
I want to extract the "real part" of a quaternion, i.e., if
L. = QuaternionAlgebra(QQ,-1,-1);
and a is in L, then I want the coefficient of 1 in the expansion of as
a linear
combination of 1, i, j and k.
Is there a way to do this? A graceful way?
(I have also discovered that using quaternio
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