Talk:Conic constant
Add topicLatest comment: 9 months ago by JdelaF in topic oblate elliptical (K > 0)?
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Someone needs to fix the diagram so that it shows curves that correspond to the equation. (You could fix the equation to match the diagram, but then it wouldn't match the reference. Is interchanging x and y original research? Someone will claim it is.) Tom Duff (talk) 00:53, 6 March 2010 (UTC)
Never mind, the diagram is OK as is. I was confused. Tom Duff (talk) 01:00, 6 March 2010 (UTC)
Mathematical constant?
[edit]Why is it included in category mathematical constants when it is not a constant (like π, e, γ, …)? It is a number that can take any value. Too late to fix the name, but name does not a constant make.
2001:67C:1220:6099:777E:4BCB:B4CA:6DEE (talk) 09:04, 19 June 2024 (UTC)
oblate elliptical (K > 0)?
[edit] Re: "This formulation is used in geometric optics to specify oblate elliptical (K > 0), spherical (K = 0), prolate elliptical (0 > K > −1), parabolic (K = −1), and hyperbolic (K < −1) lens and mirror surfaces."
Shouldn't this say "oblate elliptical (1> K > 0)"? JdelaF (talk) 20:40, 2 October 2025 (UTC)
- Ooops! Please delete the above. Apologies!! JdelaF (talk) 20:43, 2 October 2025 (UTC)