REFERENCES
- Abe , N. First extension groups of verma modules and R-polynomials. Preprint, ArXiv:1003.0169 .
- Ágoston , I. , Dlab , V. , Lukás , E. ( 2003 ). Quasi-hereditary extension algebras . Alg. Repn. Theorey 6 : 97 – 117 .
- Ágoston , I. , Dlab , V. , Lukás , E. ( 2005 ). Standardly stratified extension algebras . Comm. Algebra 33 : 1357 – 1368 .
- Cline , E. , Parshall , B. , Scott , L. ( 1996 ). Stratifying endomorphism algebras . Mem. Amer. Math. Soc. 124 .
- Dlab , V. , Ringel , C. ( 1992 ). The module theoretical approach to Quasi-hereditary algebras. Representations of algebras and related topics (Kyoto, 1990) . London Math. Soc. Lecture Note Ser. Vol. 168 . Cambridge Univ. Press , pp. 200 – 224 .
- Drozd , Y. , Mazorchuk , V. ( 2007 ). Koszul duality for extension algebras of standard modules . J. Pure Appl. Algebra 211 : 484 – 496 .
- Erdmann , K. , Sáenz , C. ( 2003 ). On standardly stratified algebras . Comm. Algebras 31 : 3429 – 3446 .
- Frisk , A. ( 2004 ). Two-step tilting for standardly stratified algebras . Algebra Discrete Math. ( 3 ): 38 – 59 .
- Frisk , A. ( 2007 ). Dlab's theorem and tilting modules for stratified algebras . J. Algebra 314 : 507 – 537 .
- Green , E. L. , Reiten , I. , Solberg, Ø. ( 2002 ). Dualities on Generalized koszul algebras . Mem. Amer. Math. Soc. Vol. 159 . p. xvi+ 67 .
- Klamt , A. , Stroppel , C. ( 2012 ). On the Ext algebras of parabolic Verma modules and A ∞-structures . J. Pure Appl. Algebra 216 : 323 – 336 .
- Li , L. ( 2012 ). A Generalized Koszul theory and its application. To appear in Trans. AMS, ArXiv: 1109.5760 .
- Li , L. ( 2012 ). Algebras stratified for all linear orders . Alg. Repn. Theory . doi: 10.1007/s10468-012-9347-1 .
- Madsen , D. ( 2006 ). Ext-algebras and derived equivalences . Colloq. Math. 104 : 113 – 140 .
- Madsen , D. (2011). On a common generalization of Koszul duality and tilting equivalence. Adv. Math. 227:2327–2348.
- Madsen , D. Quasi-hereditary algebras and generalized Koszul duality. ArXiv: 1201.0441 .
- Marcos , E. , Mendoza , O. , Sáenz , C. ( 2004 ). Stratifying systems via relative simple modules . J. Algebra 280 : 472 – 487 .
- Marcos , E. , Mendoza , O. , Sáenz , C. ( 2005 ). Stratifying systems via relative projective modules . Comm. Algebra 33 : 1559 – 1573 .
- Mazorchuk , V. ( 2007 ). Some homological properties of the category 𝒪 . Pacific J. Math. 232 : 313 – 341 .
- Mazorchuk , V. , Ovsienko , S. , Stroppel , C. ( 2009 ). Quadratic duals, Koszul dual functors, and applications . Trans. Amer. Math. Soc. 361 : 1129 – 1172 .
- Mazorchuk , V. ( 2010 ). Koszul duality for stratified algebras I: balanced quasi-hereditary algebras . Manuscripta Math. 131 : 1 – 10 .
- Mazorchuk , V. ( 2010 ). Koszul duality for stratified algebras II: standardly stratified algebras . J. Aust. Math. Soc. 89 : 23 – 49 .
- Miemietz , V. , Turner , W. The Weyl Extension Algebra of . ArXiv: 1106.5665 .
- Webb , P. ( 2001 ). Stratifications and Mackey functors. I: functors for a single group . Proc. London Math. Soc. 82 ( 3 ): 299 – 336 .
- Communicated by D. Zacharia.