https://community.wolfram.com RSS Feed for Wolfram Community showing any discussions from all groups with no replies sorted by active. https://community.wolfram.com/groups/-/m/t/3713745 three constraints are: l1 Tan@a + l2 == Sin@a/Cos[a]^2 + 1/Sin@a, l1 + l2/Tan@a == 1/(Cos@a (Sin@a)^2), 0 < a < \[Pi]/2 Why can't the following code solve the range of l1+l2? How to compute it correctly? Reduce[{l1 Tan@a + l2 == Sin@a/Cos[a]^2 + 1/Sin@a, l1 + l2/Tan@a == 1/(Cos@a (Sin@a)^2), 0 < a < \[Pi]/2, t == l1 + l2}, t, {l1, l2, a}, Reals] // FullSimplify ![enter image description here][1] [1]: https://community.wolfram.com//c/portal/getImageAttachment?filename=2026-05-10_075121.png&userId=3593842 Bill Blair 2026-05-09T23:52:05Z https://community.wolfram.com/groups/-/m/t/3713957 &[Wolfram Notebook][1] [1]: https://www.wolframcloud.com/obj/74d52d3b-de61-4316-92f3-5b500ba485b6 Alejandro Latorre Chirot 2026-05-09T20:43:05Z https://community.wolfram.com/groups/-/m/t/3713948 &[Wolfram Notebook][1] [1]: https://www.wolframcloud.com/obj/df20a2f1-2508-46fc-827f-889fbadcc2f4 Alejandro Latorre Chirot 2026-05-09T20:39:00Z https://community.wolfram.com/groups/-/m/t/3713939 &[Wolfram Notebook][1] [1]: https://www.wolframcloud.com/obj/b17033b1-5762-4865-a3b1-1296d0284269 Alejandro Latorre Chirot 2026-05-09T20:36:19Z https://community.wolfram.com/groups/-/m/t/3713930 Suppose that the position function of a particle in space is given by r[t] = {t Cos[t], t Sin[t], 3 t}. Show that the particle moves on a circular cone. Find the angle between the velocity and acceleration vectors when t = 1.5. Find the tangential and normal components of the acceleration when t = 1.5. &[Wolfram Notebook][1] [1]: https://www.wolframcloud.com/obj/ffccbfd5-d3d9-45f0-94c2-c556851a9ae2 Alejandro Latorre Chirot 2026-05-09T19:39:26Z https://community.wolfram.com/groups/-/m/t/3713462 &[Wolfram Notebook][1] [1]: https://www.wolframcloud.com/obj/f7a9ddb0-2b29-4ee7-bd7e-6740cf584667 Bruno Tenorio 2026-05-08T22:22:16Z https://community.wolfram.com/groups/-/m/t/3713297 In this notebook for the twisted surface, its inversion will be made with respect to a sphere with center at the origin and radius 4. Once you have the inverse you will get its pedal and negative-pedal surfaces. &[Wolfram Notebook][1] [1]: https://www.wolframcloud.com/obj/aa1ac836-ea25-4fa9-9127-4cfcac48ec1f Alejandro Latorre Chirot 2026-05-08T17:38:48Z https://community.wolfram.com/groups/-/m/t/3713611 Hi everyone, I’m a 3rd-year Mathematics student and I’m reaching a point where I finally start to understand what math really is. I’m fascinated by the Theory of Everything. I have a specific perspective: I believe that while physics can change based on new data, mathematics is absolute. For me, physics is like a subset of a huge axiomatic mathematical structure. I really want to study this connection, but I don’t have much background in physics yet. I live in a small city where it’s hard to find experts in this specific field, and sometimes it's difficult to stay disciplined when you study everything alone. I’m looking for a study partner or a mentor who is interested in: Mathematical Physics and Axiomatic systems. String Theory or Quantum Mechanics from a math perspective. Deep scientific discussions (not just methodology, but pure science). I want to learn fast and I'm ready to dive into complex topics. If you are interested in exploring these "intersection points" of the universe together, please let me know! Naira naira.mndlyan2005@gmail.com 2026-05-08T17:17:40Z https://community.wolfram.com/groups/-/m/t/3713379 A parabola on the plane XY is projected orthogonally on the plane x + y + z = 1. &[Wolfram Notebook][1] [1]: https://www.wolframcloud.com/obj/3664b4e5-6493-47a4-b00f-76db4a37c553 Alejandro Latorre Chirot 2026-05-08T14:08:53Z https://community.wolfram.com/groups/-/m/t/3713323 It will be about obtaining a new surface from the original. &[Wolfram Notebook][1] [1]: https://www.wolframcloud.com/obj/52ce2049-bb9a-4631-9a3b-a0a30b466a72 Alejandro Latorre Chirot 2026-05-07T21:49:35Z https://community.wolfram.com/groups/-/m/t/3713230 In this animation osculating sphere, circle and plane are observed \ moving along the Slinky curve. &[Wolfram Notebook][1] [1]: https://www.wolframcloud.com/obj/4e6a5830-ecb5-4c34-9909-0192da162ca6 Alejandro Latorre Chirot 2026-05-07T13:52:07Z https://community.wolfram.com/groups/-/m/t/3712756 It will be about obtaining a new surface from the original. &[Wolfram Notebook][1] [1]: https://www.wolframcloud.com/obj/d6339658-cc9f-4285-b17c-8d8061a8d0e6 Alejandro Latorre Chirot 2026-05-06T20:40:25Z https://community.wolfram.com/groups/-/m/t/3712398 1) Find the equation of the plane that passes through the intersection of the planes: x + z - 1 = 0, y - z + 2 = 0, and it is perpendicular to the plane z = 0. 2) Find the equation of the plane that passes through said intersection and by the origin. 3) Find the angle of two planes calculated in previous points. 4) Find their bisector planes. &[Wolfram Notebook][1] [1]: https://www.wolframcloud.com/obj/974f9492-1fc7-4fa9-a784-6265cb1c9610 Alejandro Latorre Chirot 2026-05-06T14:53:45Z https://community.wolfram.com/groups/-/m/t/3712465 Perhaps one of the most interesting surfaces that there is. Klein's bottle is an object in four dimensions, that is represented here is only in three dimensions, that's why there is a self-insertion. &[Wolfram Notebook][1] [1]: https://www.wolframcloud.com/obj/78ace18a-df34-4632-a381-235f8286249e Alejandro Latorre Chirot 2026-05-05T20:59:08Z https://community.wolfram.com/groups/-/m/t/3712307 It will be about obtaining a new surface from the original. &[Wolfram Notebook][1] [1]: https://www.wolframcloud.com/obj/f3be4da6-6133-47b2-8003-7671696874e7 Alejandro Latorre Chirot 2026-05-05T14:43:32Z https://community.wolfram.com/groups/-/m/t/3712010 It will be about obtaining a new surface from the original. &[Wolfram Notebook][1] [1]: https://www.wolframcloud.com/obj/b8452a9c-f5ab-4b8b-8ab8-88c859e4a23c Alejandro Latorre Chirot 2026-05-04T19:55:37Z https://community.wolfram.com/groups/-/m/t/3711592 This formula is more accurate at predicting SNe Ia comoving distances than FLRW and since it's analytical, it will execute upwards of 10,000 faster and give you machine precision. $D_C(z) = \frac{t_o\left(2V_0 - A t_o\right) z}{2 + z}$ ![enter image description here][1] That's it. That's all there is to it. Here's how it compares to FLRW: ![enter image description here][2] Red is the analytical formula, blue is FLRW. Using the full covariance matrix of the Pantheon+ SH0ES project, the reduced $\chi^2$ of 1.68 for the analytical formula is significantly better than 2.49 for the numerical FLRW solution. This is an outrageous claim, so it should be easy to debunk. The full paper is here: [Acceleration Law Article][3] and the notebook is here: [Acceleration Law Notebook][4]. I'd appreciate your feedback, positive or negative. [1]: https://community.wolfram.com//c/portal/getImageAttachment?filename=Screenshot2026-05-04204344.png&userId=20103 [2]: https://community.wolfram.com//c/portal/getImageAttachment?filename=HubbleDiagram.png&userId=3608757 [3]: https://www.wolframcloud.com/obj/de2ae88c-5ea9-4334-8b9c-3edbbac38fa5 [4]: https://www.wolframcloud.com/obj/ed737c03-5baf-49f4-90e3-83b91b245c2a Donald Airey 2026-05-04T19:36:36Z https://community.wolfram.com/groups/-/m/t/3711474 It will be about obtaining a new surface from the original. &[Wolfram Notebook][1] [1]: https://www.wolframcloud.com/obj/5a1a81ee-6aaf-460c-8199-ed0c8f81ab54 Alejandro Latorre Chirot 2026-05-04T15:16:04Z https://community.wolfram.com/groups/-/m/t/3711083 It will be about obtaining a new surface from the original. &[Wolfram Notebook][1] [1]: https://www.wolframcloud.com/obj/4eca8e80-723d-4898-be62-0a60b31a597a Alejandro Latorre Chirot 2026-05-03T17:51:20Z https://community.wolfram.com/groups/-/m/t/3711074 One of the thousands of examples where differential equations are used, apart from Differential Geometry. &[Wolfram Notebook][1] [1]: https://www.wolframcloud.com/obj/0b8c3cd2-69ec-4ec8-a587-42db1e7c0364 Alejandro Latorre Chirot 2026-05-03T16:35:08Z