Timeline for The set of polytopes with given $f$-vector
Current License: CC BY-SA 4.0
5 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Oct 23, 2018 at 22:10 | comment | added | Jonathan Frink | I'm also a little bit confused by this argument - is it possible to make it a little bit more rigorous? | |
| Oct 23, 2018 at 18:25 | comment | added | Alexandre Eremenko | @Avi Steiner: rational operation is what you obtain by performing the 4 arithmetic operations on numbers and variables. 4 arithmetic operations are addition, subtraction, multiplication and division. Solving systems of linear equations involves only these operations. | |
| Oct 23, 2018 at 15:31 | comment | added | Avi Steiner | Also, although the $n=1$ case (with $f=(2,1)$) isn’t algebraic in the sense of an algebraic subset, it is a real algebraic variety as it is exactly the set of $\Bbb R$-valued points of the (quasiaffine) complex algebraic variety $\Bbb C^2 \setminus V(x-y)$. | |
| Oct 23, 2018 at 15:15 | comment | added | Avi Steiner | What is a rational operation in this context? I am not very familiar with real algebraic geometry. | |
| Oct 23, 2018 at 13:22 | history | answered | Alexandre Eremenko | CC BY-SA 4.0 |