This is a math textbook, licensed under the GNU Free Documentation License. It is written in English. There is an unofficial Russian translation
If you like chatting on IRC, come see us in #lysa on FreeNode. If
you don't know what IRC is, or you don't have a client set up, you can
connect through FreeNode's webchat.
If you notice any errors, don't be shy to report them in the issue tracker. If you have any suggestions for improving LYSA, also post them in the issue tracker (or bring them up in the IRC channel).
If you don't feel like using the issue tracker, you can email me at
peter@harpending.org.
If you have any questions about LYSA (or math), feel free to ask in the channel, or in the issue tracker.
If you are interested in contributing, please see the
CONTRIBUTING.md file.
LYSA is licensed under the GNU Free Documentation License. The
license can be found in the LICENSE file in the project root.