On Sunday, August 2, 2020 at 4:02:28 PM UTC+5, Ralf Hemmecke wrote:
>
> Hi Roustam,
>
Hi Ralf,
Have you checked whether your versions are appropriate?
>
> https://jfricas.readthedocs.io/en/latest/install.html#check-requirements
>
Yes, I have. All was clear. I'm on Kubuntu 20.04, so
What I really need is to solve the system for s but solve([%% 6, %% 7],
[s]) also gave me an empty list. I only added t because in Mathematica
Reduce[{%7, %8}, {s, t}] gives several solutions one of which contains the
sought equation for s [but after replacing k with n*m beforehand]. [s,
Thank you, guys. I think I would rather use jFriCAS than TexMacs. However,
when I open a saved file I get an error:
The error was:
TypeError: ext.toLowerCase is not a function
See the error console for details.
[I 14:04:33.785 NotebookApp] Kernel started: 10c515df-148b-48f0-b4b0-
I have also tried to apply k->n*m but it didn't help. Maybe I did it wrong.
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Here is what Wolfram Mathematica can solve:
[1] m*a==-m*g-k*v[t]
[2] %1/.a->v'[t]
[3] DSolve[{%2, v[0]==V0}, {v[t]}, {t}]
[4] Simplify[%3/.k->n*m]
[5] (v[t]/.%4)[[1]]
[6] Integrate[%5, {t, 0, t}]
[7] (%6/.{V0->Vx, g->0})==s
[8] (%6/.{V0->Vy})==0
[9] Reduce[{%7, %8}, {s, t}]
[10]
Thank you, Waldek, for the explanation. Your examples have shed light on
the matter.
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Please find attached the input file.
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To view this
Hello,
Why do I get an empty list at (8) as a result of the following commands?
(1) v:=operator 'v
(2) m*a=-m*g-k*v(t)
(3) subst(%% 2, a=D(v(t),t))
(4) solve(%% 3, v, t=0, [V0])
(5) integrate(%% 4, t=0..t)
(6) subst(%% 5, [V0=Vx, g=0]) = s
(7) subst(%% 5, V0=Vy) = 0
(8) solve([%% 6, %% 7], [s,
What's the difference between subst(%% 2, a=differentiate(v(t),t)) and
eval(%% 2, a=differentiate(v(t),t))?
On Monday, July 27, 2020 at 12:06:59 AM UTC+5, Bill Page wrote:
>
> (3) -> subst(%% 2, a=differentiate(v(t),t))
>
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uation(Expression(Integer))
>
>
> On Sun, Jul 26, 2020 at 11:33 AM Roustam Shaitan > wrote:
>
>> Hello,
>>
>> In Wolfram Mathematica it's possible to transform an equation with
>> ReplaceAll (/.):
>>
>> In[1]m*a==-m*g-k*v[t]
>> Out[1] am=
Hello,
In Wolfram Mathematica it's possible to transform an equation with
ReplaceAll (/.):
In[1]m*a==-m*g-k*v[t]
Out[1] am=-gm-kv(t)
In[2]%1 /. a->v'[t]
Out[2] mv'(t)=-gm-kv(t)
How to do the same in FriCAS? With rules? Can I apply them to equations and
not just expressions?
Thank
On Wednesday, July 22, 2020 at 2:14:52 AM UTC+5, Kostas Oikonomou wrote:
>
> Yes. But TeXmacs has to be able to find Fricas in your PATH.
>
I added *PATH="$PATH:$HOME/FriCAS/bin/" *to* ~/.profile* and did a
re-login. Now I can start a FriCAS session in TeXmacs. Thanks a lot for
your help,
On Tuesday, July 21, 2020 at 6:46:34 PM UTC+5, Kostas Oikonomou wrote:
>
> That is the latest version. All you need to do is start a Fricas session.
>
>From Insert -> Session ? I do not have FriCAS in the list. Is it because I
installed it in my home directory instead of /usr/local/ ?
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Thank you guys for your comments.
On Sunday, July 19, 2020 at 9:58:54 PM UTC+5, Waldek Hebisch wrote:
>
> If you can get Texmax to work, it is true WYSIWYG formula editor.
> The 'if you can get to work' qualification is because you need
> reasonably new version of Texmax. Those versions depend
Yes, *make install* did the trick. Thank you.
As far as I understand, FriCAS does not have a WYSIWYG formula editor and
viewer. Are there any free CASes with such a feature?
Roustam
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Hi Ralf,
On Sunday, July 19, 2020 at 1:41:02 PM UTC+5, Ralf Hemmecke wrote:
>
> Oooops. I thought I had replaced all appearences of axiom by fricas. Can
> you tell me on which page you found it?
>
Page 21 "1.1 Starting Up and Winding Down"
This is certainly not the exact error message. Can you
Hello,
I downloaded the source code from
https://codeload.github.com/fricas/fricas/zip/master and built with
*configure* and *make*.
The book (https://fricas.github.io/book.pdf) says there should be the
command *axiom* but I only found the file *fricas* in
*target/x86_64-linux-gnu/bin/* .
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