REFERENCES
- Beck , J. 1994 . Convex Bases of PBW-type for Quantum Affine Algebras . Comm. Math. Phys. , 165 ( 1 ) : 193 – 199 .
- Bourbaki , N. 1968 . Groupes et Algèbres de Lie Paris : Hermann . Chaps. 4–6
- Deodhar , V. V. 1986 . Some Characterizations of Coxeter Groups . Enseign. Math. , 32 ( 1–2 ) : 111 – 120 .
- Ito , K. Parametrizations of Infinite Biconvex Sets in Affine Root Systems . Preprint, arXiv.math.QA/9911214 (accessed Nov 1999)
- Kac , V. G. 1990 . Infinite Dimensional Lie Algebras , third ed. Cambridge, , UK : Cambridge Univ. Press .
- Kirillov , A. N. and Reshetikhin , N. 1990 . q-Weyl Group and a Multiplicative Formula for Universal R-matrices . Comm. Math. Phys. , 134 ( 2 ) : 421 – 431 .
- Khoroshkin , S. M. and Tolstoy , V. N. The Cartan-Weyl Basis and the Universal R-matrix for Quantum Kac-Moody Algebras and Superalgebras . Proc. of the Int. Workshop on Math. Physics, Clausthal . July 15–20 1991 . Quantum Symmetries , Edited by: Doebner , H.-D. and Dobrev , V. K. pp. 336 – 351 . River Edge, NJ : World Sci. Publishing .
- Lusztig , G. 1993 . Introduction to Quantum Groups Boston : Birkhäuser .
- Papi , P. 1994 . A Characterization of a Special Ordering in a Root System . Proc. Amer. Math. Soc. , 120 ( 3 ) : 661 – 665 .
- Papi , P. 1995 . Convex Orderings in Affine Root Systems . J. Algebra , 172 ( 3 ) : 613 – 623 .