Timeline for Diophantine equation $\cos(2\pi x)\cos(2\pi y) = \cos(2\pi z)$
Current License: CC BY-SA 4.0
4 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Nov 21, 2023 at 23:40 | vote | accept | WhatsUp | ||
| Nov 21, 2023 at 14:40 | comment | added | David E Speyer | Got it. That makes sense; that's the case where $(p_1, q_1, r_1)$ and $(p_2, q_2, r_3)$ are orthogonal (they are the axes of the rotation) so $(\ast)$ turns into $\cos \theta_3 = \cos \theta_1 \cos \theta_2$. | |
| Nov 21, 2023 at 14:24 | comment | added | WhatsUp | Thanks for the solution. I was too sketchy on the background: I want two rotations to have $x$ and $y$ axis as axis respectively. | |
| Nov 21, 2023 at 13:51 | history | answered | David E Speyer | CC BY-SA 4.0 |