Báo cáo toán học: "The (t,q)-Analogs of Secant and Tangent Numbers" potx

... a theorem of Chevalley [Hu, §3.15], the second a theorem of Bott [Hu, §8.9]. We should mention that Bott’s proof, although extremely elegant and unified, is not completely elementary, and more ... elementary proofs of some cases of his theorem have recently appeared in [BB, BE , EE, ER]. We first consider an infinite family of Coxeter systems with linear diagrams. Let W r,s n be th...

Ngày tải lên: 07/08/2014, 06:20

... bio- mass and there was no consistent pattern in the way under- cutting affected lateral and fine root biomass of birch and beech on the one hand and oak and ash on ... Ash and oak survival was high irrespective of desiccation treatment, whereas survival of beech and especially of birch was impaired by drying. The effect of rough...

Ngày tải lên: 08/08/2014, 14:21

... volume of water or polyethylene glycol solutions was maintained. To determine initial moisture content four replications of 100 seeds each of the two main sizes in a seedlot (3 and 4) and of an ... replications of 100 seeds each from the five size classes were randomly placed in germination boxes, and tested over a range of sub- to supra-optimal constant temperatures of 13...

Ngày tải lên: 08/08/2014, 14:22

... q)-analogs of the tangent and secant numbers, respectively. They may be rega rded as the graded forms of the traditional q -tangent and q -secant numbers T 2n+1 (q), E n (q) defined in (1.1) q and (1.2) q . ... := sin (r) q (u) cos (r) q (u) ;(1.8) sec (r) q (u) := 1 cos (r) q (u) ;(1.9) and define the (t, q)-analogs of the tangent and secant numbers as being the coeffic...

Ngày tải lên: 08/08/2014, 14:23

... age of 74 years (SD = 15.0). A study of the TOAST classification of the type of strokes revealed an unusually high number of cardio-embolic strokes in our cohort (50.3%). The median number of ... Radiology and Intervention Council, and the Atherosclerotic Peripheral Vascular Disease and Quality of Care Outcomes in Research Interdisciplinary Working Groups: the America...

Ngày tải lên: 20/06/2014, 20:20

Ngày tải lên: 20/06/2014, 21:20

... the distribution of the frequency of use of Cantonese, English and Putonghua in non-work- place and workplace situations. Asshowninthefigure,Cantoneseisthe most often used language in both non- workplace and ... clerical and technical work 629 62.8% Professionals, associate professionals and middle managers 314 31.3% Administrative staff and senior executives 59 5.9% Figure...

Ngày tải lên: 20/06/2014, 21:20

Ngày tải lên: 05/08/2014, 10:20

Ngày tải lên: 05/08/2014, 10:20

Ngày tải lên: 05/08/2014, 15:20