# Textbook on group theory [duplicate]

Can you recommend me a good textbook on group theory? I am interested in particular in tensor representation of a group, e.g. why $3 \otimes 3 = 6 \oplus \bar 3$ for $\rm SU(3)$. Is there any textbook that can explain clearly that?

• Lie Algebras in Particle Physics by Georgi definitely; also check out the lecture videos that are based on it at pirsa.org. – JamalS Oct 21 '16 at 8:19
• I think a similar question is somewhere asked and answered on this site. – Shing Oct 21 '16 at 8:20
• Possible duplicate of Comprehensive book on group theory for physicists? – Shing Oct 21 '16 at 8:24