|This is the 13,532-nd antisymmetric Dirichlet (136,519-th Dirichlet) eigenfunction in the (unit-edged) regular pentagon. It has about about 250 wavelengths across the pentagon. Its eigenvalue is about $\lambda=1,000,126.718$; which is the 81,917-th distinct Dirichlet eigenvalue. Click on it for a high resolution nodal pattern (20 pixels per wavelength).|
Play boggle, the word game. This is me practicing server-side scripting in perl.
FlashCard. Here is flashcard page I wrote featuring about 100,000 Chinese words. It is only used to help you visually memorize Chinese characters and compounds.
It is based on a corpus of 160,000 files (used to compute frequency) and an aging CEDICT (to provide the translations). The flashcard program uses an algorithm that I devised based entirely on my experience in using physical flashcards: It starts easy (most frequent) and progresses with spaced repetition.
You may optionally enter a string (not a password) that would be hard for someone to think of or guess, and then click [Start] (and then [Save] if asked). Use your string again if you want to resume where you left off. (Your string is displayed above the "card" in "FC: hbelabs→public→D95V", here it would be D95V.) While running it, click [Next] if you know the one with the definition displayed (and want it removed from your deck), click [Loop] if you want to put that one back in the deck. Every card shows up at least twice.