ASKSAGE: Sage Q&A Forum - RSS feedhttps://ask.sagemath.org/questions/Q&A Forum for SageenCopyright Sage, 2010. Some rights reserved under creative commons license.Mon, 22 Jun 2020 01:32:55 +0200Coefficient of Polynomial of Differential Forms and displaying List for differential formshttps://ask.sagemath.org/question/52136/coefficient-of-polynomial-of-differential-forms-and-displaying-list-for-differential-forms/The coefficient function gives us the coefficient of a polynomial. For example,
g(x)=3*x^(2)
g.coefficient(x^(2))
Just started learning differential forms, so using notation here-
https://ask.sagemath.org/question/40345/differential-forms-best-package/
U = Manifold(4, 'U')
X. < x,y,z,w > = U.chart()
f = U.diff_form(4, 'f')
f[0,1,2,3]=3*x^(2)
f.display()
(f[0,1,2,3]).coefficient(x^(2))
I want to work backwards. For example, given a 4-form named Form, Form[0,1,2,3] gives me the polynomial of the form. I wish to find the coefficient of this polynomial the same way. So from above, I should be getting 3. But I get:
'ChartFunctionRing_with_category.element_class' object has no attribute 'coefficient'.
Question 1: How do I fix this?
Question 2: Suppose I have a list of 4-forms called List. From the link above, I can view every form in List by doing
List[1].display().
However, how do I quickly view all the forms?
List.display() gives me an error so can I only view the forms term by term?
QuestionwhatupmattMon, 22 Jun 2020 01:32:55 +0200https://ask.sagemath.org/question/52136/