Celebratio Mathematica

G. Ben­k­art and S. With­er­spoon: “A Hopf struc­ture for down-up al­geb­ras,” Math. Z. 238 : 3 (2001), pp. 523–​553. MR 1869697 Zbl 1006.​16028 article

G. Ben­k­art and S. With­er­spoon: “Rep­res­ent­a­tions of two-para­met­er quantum groups and Schur–Weyl du­al­ity,” pp. 65–​92 in Hopf al­geb­ras (1–3 Feb­ru­ary 2002, Chica­go). Edi­ted by J. Ber­gen, S. Catoiu, and W. Chin. Lec­ture Notes in Pure and Ap­plied Math­em­at­ics 237. Dek­ker (New York), 2004. MR 2051731 Zbl 1048.​16021 ArXiv math/​0108038 incollection

G. Ben­k­art and S. With­er­spoon: “Re­stric­ted two-para­met­er quantum groups,” pp. 293–​318 in Rep­res­ent­a­tions of fi­nite di­men­sion­al al­geb­ras and re­lated top­ics in Lie the­ory and geo­metry (15 Ju­ly–10 Au­gust 2002, Toronto). Edi­ted by V. Dlab and C. M. Ringel. Fields In­sti­tute Com­mu­nic­a­tions 40. Amer­ic­an Math­em­at­ic­al So­ci­ety (Provid­ence, RI), 2004. MR 2057401 Zbl 1048.​16020 incollection

G. Ben­k­art and S. With­er­spoon: “Two-para­met­er quantum groups and Drin­fel’d doubles,” Al­gebr. Rep­res­ent. The­ory 7 : 3 (2004), pp. 261–​286. MR 2070408 Zbl 1113.​16041 ArXiv math/​0011064 article

G. Ben­k­art and S. With­er­spoon: “Quantum group ac­tions, twist­ing ele­ments, and de­form­a­tions of al­geb­ras,” J. Pure Ap­pl. Al­gebra 208 : 1 (January 2007), pp. 371–​389. MR 2270011 Zbl 1116.​16035 ArXiv math/​0503310 article

G. Ben­k­art, M. Pereira, and S. With­er­spoon: “Yet­ter–Drin­feld mod­ules un­der cocycle twists,” J. Al­gebra 324 : 11 (December 2010), pp. 2990–​3006. To Susan Mont­gomery in hon­or of her dis­tin­guished ca­reer. MR 2732983 Zbl 1223.​16011 ArXiv 0908.​1563 article