Emmanuel Charpentier's profile - activity

but that integral seems to be computed symbolically. Nope. It's just that : it can't be expressed in terms of "e

To illustrate Frederic's answer: def buildit(p): if not p.is_prime(): raise DomainError("p must be prime !"

Did you try import pdb;pdb.set_trace()in a Sage terminal ?

This might be of some help...

[This]https:/(/doc.sagemath.org/html/en/thematic_tutorials/vector_calculus/vector_calc_advanced.html) might be of some h

This might be of some help...

Homework ? What do you mean ?

Homework ? What do you mean ?

Homework ?

Why should it ?

A raid test show that symbols (at least symbolic variables) are unique :

sage: L=[var("y")]
sage: L+=[var("y")]
sage: bool(L[0]==L[1])
True
sage: bool(L[0] is L[1])
True

The secod y has been created at the same place as the first. But other symbols do not seem to obey the same rules :

sage: R1.<t>=QQ[]
sage: foo = t
sage: R2.<s,t,u>=QQbar[]
sage: foo.parent()
Univariate Polynomial Ring in t over Rational Field
sage: t.parent()
Multivariate Polynomial Ring in s, t, u over Algebraic Field
sage: foo is t
False                # expected : the same object can't have two different parents.
sage: foo == t
True                # less expected...

What is the meaning of == in the latter case ?

It should be noted that those two case are slightly inconsistent ; they are also both inconsistent with :

sage: foo = (x+y).variables()[0]
sage: bar = (x+y).polynomial(SR).variables()[0]
sage: foo.parent()
Symbolic Ring
sage: bar.parent()
Multivariate Polynomial Ring in x, y over Symbolic Ring
sage: foo is bar                # expected : the same object can't have two different parents.
False
sage: foo is bar                # also expected.
False

Thank you VERY MUCH !. Now, that's clear(er)...

Ahem... sage: sympy.solve((8^(3*x)==16^(x+1))._sympy_(), x._sympy_()) [4/5, 4/5 - 4*I*pi/(5*log(2)), 4/5 - 2*I*pi/(5*

Are symbols guaranteed unique ? A raid test show that symbols (at least symbolic variables) are unique : sage: L=[var("

Pleas see sage-support : Sage has trouble converting your semi-numerical expression into a pure symbolic one. This might

Pleas see sage-support : Sage has trouble converting your semi-numerical expression into a pure symbolic one. This might

I just formatted it across multiple lines for presentation in my question. Could you repost it UNformatted ?

Not an answer, but a comment needing more room than allowed in a comment : sage: %cpaste Pasting code; enter '--' alone

Not an answer, but a comment needing more room than allowed in a comment : sage: %cpaste Pasting code; enter '--' alone

Not an answer, but a comment needing more room than allowed in a comment : sage: %cpaste Pasting code; enter '--' alone

Tour copy seems incorrect :sage: f(1).n() 1.39111866114058e-12 + 6.95559330500736e-6*I sage: F(1).n() 4.83802782246652

Homework ?

Answer your own quest by stating that " this is a misinterpretation of" yours. This may help the next poor sod that will

These bugs seem mutually independent : sage: var("a, b") (a, b) sage: assume(a, "real") sage: equation=[a+b==0] sage: s

solve has two positional arguments : a (list of) equation(s) to solve, and a (list of) variable(s) to solve for. You

solve has two positional arguments : a (list of) equation(s) to solve, and a (list of) variable(s) to solve for. You

This seems to result from the change of variable name : sage: var('x,u,w') (x, u, w) sage: F(x)=integral((min_symbolic(

Are we supposed to guess the relationship you with to establish between the ring an the number and nams of the variables

What you want to do may or may no be legitimate. Read the introduction to this section of the Sympy documentation...

This might be of some interest for you... as well as this answer.

This might be of some interest for you... as well as this answer.

This might be of some interest for you... as well as [this answer]https://ask.sagemath.org/question/10682/singular-value

This might be of some interest for you...

I do not know well the quaternion algebra implementation, so I may miss a better answer ; hence a workaround : sage: Q.

I do not know well the quaternion algebra implementation, so I may miss a better answer ; hence a workaround : sage: Q.

I strongly recommend this book f you want to ease your beginnings with Sagemath... Also : state your answer explicitly

I strongly recommend this book f you want to ease your beginnings with Sagemath...

If so, why doesn't this happen when ee is substituted to e ? Hmmm ?

IMNSHO, this is a (minor) bug in plot, and should be reported as such...

This is basically the same issue as the recent one with "D", which denotesfricas' derivative operator : "e" has special

BTW : sage: integrate(x^(k-1)*e^(-x/theta)/(gamma(k)*theta^k), x) -x^k*gamma(k, x/theta)/(theta^k*

Thanks, but the default have changed from maxima to giac in current sagemath (it used to be maxima in earlier version

Thanks, but the default have changed from maxima to giac in current sagemath (it used to be maxima in earlier version

Note : : the first part of this answer is partly misleading. see the "IMPORTANT EDIT" below for the real explanation...