We've heard many requests to make it even easier to create rich content. It's always been our goal to create a system which empowers everyone with a vision of an interactive lesson to turn it into reality - without needing to know how to program. :)
Our first version, eML, helped to reduce the barrier significantly, but today, we've released an even easier-to-use lesson editor! It's still under intense development, and so you'll see it grow through leaps and bounds over the next few days. Give it a spin, and share your feedback! We'd be happy to improve it to the liking of our community. :)
Attention all females of the expii community! Po-Shen Loh and I started a Facebook page for all the girls on expii so that we can boost the number of girls on this site (and hopefully in the world of mathematics in general) and inspire other young girls to be interested in math as well! If you're interested in joining, please find us on Facebook and we'll add you to the page!
Hi Michael! When is the next astronomy edit-a-thon? :)
I'm new to expii, and I've only just started to explore all the content here. I noticed that there isn't yet a topic on constructible numbers; will that be coming in the future? I think I have some writing that could contribute to that topic.
OK, I've posted an explanation here:
Feedback is welcome!
Hi! Since @Po-Shen-Loh is currently on a plane to Munich en route to the Romanian Masters in Mathematics (wish team USA luck!), I'll be running this Jam today. Here's just some links to the pages about Waves that people can post in.
Since all these links have at most 1 post and no exercises, any contribution is very very helpful! Feel free to ask any questions, discuss any ideas, write/edit articles, etc. I'll be writing about interference in the meantime.
Does anyone have the solutions for the USA TSTST 2015, especially problems 3 and 6, since there are no correct solutions posted on AoPS as of now?
How do I...
@Po-Shen-Loh Can I get https://www.expii.com/t/existence-of-the-dodecahedron-1193?type=explanation&id=5144 deleted too, please? I accidentally typed this when I meant to type it in another tab, and saved it.
We pull profile images from gravatar. So if you add an image to the email you use for Expii, we'll pull it down.
That was recently added- the first draft of the problem did not have the log languange in there. Thank you Expii for adding this. (Although the problem STILL doesn't take Log[2^150-1]- instead it appears to accept everything within [723,756] which is an interval of diameter 33 centered at about Log[148^148] for some insane reason. I'd love for someone to come up with a solution showing this and refuting the solutions proposed by Circonflexe and me.)
Edit 10/14: I figured it out with the help of someone who knows more graph theory than I do. It turns out that a random r-regular graph is almost surely r-connected- see here for claim. If you draw a 3-regular graph, you can pretty quickly find one that's big enough to do better than the cube.
The books are fine if you get the PDF version of it and print it yourself.
Check these out! So many hidden gems in this world (the internet in particular). :) We'll definitely be consulting this for the upcoming Algebra map (which might include number theory and some counting as well)!