Chebfun users group
The first place for help and to ask questions is the Chebfun users group chebfun-users.
We're eager to hear what you think about Chebfun. Contact us at firstname.lastname@example.org with questions, bugs, comments, suggestions, requests, compliments, or interesting uses you have found for Chebfun. You can keep track of news about major releases, events, and other Chebfun-related activity by subscribing to our mailing list.
Those with Github accounts are encouraged to submit bug reports directly to the Github issues tracker. Otherwise, email us as above.