Mao's technical notes

Request CC extension

I would believe that the CC-BY-SA 4 license should be enough for most of the cases. Commercial reuse is allowed without contacting me if the conditions of the license is followed. For attribution, a hyperlink to either the original URL of the article or to this site ( is enough.

If you still want to negotiate, feel free to email

If you translate an article here, you can choose to contribute back so that your translation could be shown here as another language the article is available in. Contact me for details.

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