Thesis is a 1961 album by the Jimmy Giuffre 3.

The trio on the recording was Giuffre's second drummerless group.

He said at the time that the trio was "searching for a free sense of tonality and form".

[3] It was remastered, remixed and re-released by ECM in 1992 as a double-album with the trio's other 1961 Verve recording, Fusion (with three previously unissued tracks from the August sessions).

Additional tracks on 1992 ECM reissue: All compositions by Jimmy Giuffre, except as otherwise noted.