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2023-12-16 16:17:18 +0100 asked a question Problem by calculating the gradient with respect to a metric matrix

Problem by calculating the gradient with respect to a metric matrix Hello, I have some problems to calculate the gradie

2023-12-10 17:27:11 +0100 edited question Wrong result for partial derivative

Wrong result for partial derivative Hello, I want to take the partial derivative with respect to the variable from the f

2023-12-10 17:00:01 +0100 received badge  Notable Question (source)
2023-12-10 14:22:55 +0100 asked a question Wrong result for partial derivative

Wrong result for partial derivative Hello, I want to take the partial derivative with respect to the variable from the f

2023-11-26 18:29:27 +0100 asked a question symbolic function with a variable list of parameters

symbolic function with a variable list of parameters I knw that I can define a symbolic function as fro example: f1(r, t

2023-11-26 17:13:03 +0100 commented answer How to define a vector field over a chart?

Thank you for your comment. Unfortunately this doesn't work. I get the error message "no starting chart could be found

2023-11-26 12:04:46 +0100 asked a question How to define a vector field over a chart?

How to define a vector field over a chart? Hello, I have the following code in sage: E.<x,y,z> = EuclideanSpace()

2023-11-25 18:44:02 +0100 answered a question Wrong result for gradient in spherical coordinates

Thank you very much for your answer. You are right, I expected the answer in e_r, e_theta and e_phi. Is there a way to g

2023-11-25 13:51:14 +0100 received badge  Editor (source)
2023-11-25 13:51:14 +0100 edited question Wrong result for gradient in spherical coordinates

Wrong result for gradient in spherical coordinates Hello, I use the following code to calculate the divergence of a sca

2023-11-25 13:44:12 +0100 asked a question Wrong result for gradient in spherical coordinates

Wrong result for gradient in spherical coordinates Hello, I use the following code to calculate the divergence of a sca

2023-11-05 17:17:23 +0100 answered a question Simplifying a polynomial expression

That's it! Thousand thanks!!!!!

2023-11-05 16:36:08 +0100 asked a question Simplifying a polynomial expression

Simplifying a polynomial expression Hello, I have an expression like μ^8+4μ^6ν^2+6μ^4ν^4+4μ^2ν^6+ν^8 This is the same as

2023-10-01 16:09:13 +0100 asked a question Plotting a set of R^2 using three variables

Plotting a set of R^2 using three variables I have a set defined as 0<=x<=y, 0<=z<=3, 1<= x^2+y^2 <

2023-07-26 00:21:47 +0100 received badge  Popular Question (source)
2023-07-16 12:14:34 +0100 answered a question Question for formatted output

Thank you very much! It works !!

2023-07-15 18:03:23 +0100 asked a question Question for formatted output

Question for formatted output Hello, when executing the commands t=var('t') g(t)=t^2 diff(g,t) I get as a result: t -&

2023-05-31 06:10:10 +0100 received badge  Popular Question (source)
2023-05-29 13:13:05 +0100 answered a question christoffel symbols of the second kind: how exactly to calculate?

Thank you very very much for your efforts1 Best wishes Hans

2023-05-25 16:29:18 +0100 asked a question christoffel symbols of the second kind: how exactly to calculate?

christoffel symbols of the second kind: how exactly to calculate? Hello, I have a function f(u,v) = ( cos(v)sin(u), sin

2022-11-26 10:25:29 +0100 answered a question Problem to calculate arcsin(5/24*cos(45)) to a real number

Thank you very much for your answer, it was very helpful.

2022-11-24 14:50:17 +0100 received badge  Student (source)
2022-11-23 08:26:54 +0100 asked a question Problem to calculate arcsin(5/24*cos(45)) to a real number

Problem to calculate arcsin(5/24*cos(45)) to a real number Hello, when I enter the expression "arcsin(5/24cos(45))" in J