Q.E.D. (Terje Rypdal album)
Q.E.D. is an album of contemporary classical music by guitarist Terje Rypdal recorded in 1991 and released on the ECM label in 1993.

Reception
The Allmusic review by Paul Collins awarded the album 3 stars stating "Rypdal often alternates sections of great dissonance with near silence, or lonely sustained notes by just one or two instruments. It can have the sweeping starkness of a tracking shot over a fjord, but there's a certain coldness to it as well, and even confirmed fans of his jazz work may take a while to warm up to it".

Track listing
All compositions by Terje Rypdal
 "Quod Erat Demonstrandum (Opus 52): 1st Movement" - 4:56   
 "Quod Erat Demonstrandum (Opus 52): 2nd Movement" - 2:20   
 "Quod Erat Demonstrandum (Opus 52): 3rd Movement" - 4:55   
 "Quod Erat Demonstrandum (Opus 52): 4th Movement" - 4:52   
 "Quod Erat Demonstrandum (Opus 52): 5th Movement" - 18:21   
 "Largo (Opus 55)" - 16:47

Personnel
Terje Rypdal — electric guitar
Borealis Ensemble — conducted by Christian Eggen (track 1)

References

ECM Records albums
Terje Rypdal albums
1993 albums
Albums produced by Manfred Eicher