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2017-09-23 20:18:01 +0200 | commented question | Show a multivariable function is nonvanishing when it is subject to constraints Maybe, but it is unclear how to extend this to the multivariable case. |
2017-09-23 17:01:25 +0200 | commented answer | Call error for integers (when I haven't declared any.) sigh I can't believe that I did not see this. Thank you |
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2017-09-23 16:56:19 +0200 | asked a question | Show a multivariable function is nonvanishing when it is subject to constraints say we have a function $f:\mathbb R^3 \to \mathbb R$ given by $f(x,y,z)=\sin(x)\sin(y)\sin(z)$ suppose further that there constraints $x,y,z \in (0, \pi/2)$ and $z>x+y$. Clearly this function is nonvanishing with these constraints. Is there a way to get sage to show this? I've tried fiddling around, but I'm not sure how to do it. I've tried but this does not work ( I don't think I understand the solve function) |
2017-09-23 03:20:04 +0200 | asked a question | Callback Error for integers (when I didn't declare any) So, I declared some variables and I wanted to define a function (that I eventually want to solve for zeroes of.) Basically, the function is But I'm getting 'sage.rings.integer.Integer' object is not callable which just do not understand. |
2017-09-23 03:17:11 +0200 | asked a question | Call error for integers (when I haven't declared any.) I'm trying to define a pretty atrocious function (that I eventually want to solve for zeroes) in three variables, k,j,N. I tried to just use but I'm getting: TypeError: 'sage.rings.integer.Integer' object is not callable why is this, I already had that so what can I do to fix this error? |
2017-08-07 23:10:42 +0200 | asked a question | Is there a way to check whether or not this is a floating point error? I have the following functions defined: Now, if I use the solve function: sage: solve(AA(N,j,k)==0,N) I get the output However, it is my hope that this equation has no solutions. Indeed, if I add to the assumption that AA(N,j,k)>0, I obtain a contradiction (inconsistent assumptions), but if I add AA(N,j,k)==0, I don't get inconsistent assumptions. Is there a way to check if this is a floating point error, or if there really is a solution with my assumptions? |
2017-07-29 05:02:34 +0200 | asked a question | Sage not returning roots of polynomimal I have a polynomial w=q^32 - q^30 + 3q^28 - 3q^26 + 6q^24 - 6q^22 + 9q^20 - 9q^18 + 12q^16 - 9q^14 + 9q^12 - 6q^10 + 6q^8 - 3q^6 + 3*q^4 - q^2 + 1 and I tried using solve(w==0,q). But sage only returns [0 == q^32 - q^30 + 3q^28 - 3q^26 + 6q^24 - 6q^22 + 9q^20 - 9q^18 + 12q^16 - 9q^14 + 9q^12 - 6q^10 + 6q^8 - 3q^6 + 3*q^4 - q^2 + 1] why is this? I'm looking for complex roots. |