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371.
Jan Kühr 《Czechoslovak Mathematical Journal》2008,58(2):395-415
We deal with unbounded dually residuated lattices that generalize pseudo MV-algebras in such a way that every principal order-ideal is a pseudo MV-algebra. We describe the connections of these generalized pseudo MV-algebras to generalized pseudo effect algebras, which allows us to represent every generalized pseudo MV-algebra A by means of the positive cone of a suitable ℓ-group G
A
. We prove that the lattice of all (normal) ideals of A and the lattice of all (normal) convex ℓ-subgroups of G
A
are isomorphic. We also introduce the concept of Archimedeanness and show that every Archimedean generalized pseudo MV-algebra is commutative.
Supported by the Research and Development Council of the Czech Govenrment via the project MSM6198959214. 相似文献
372.
Using actions of free monoids and free associative algebras, we establish some Schreier-type formulas involving ranks of actions and ranks of subactions in free actions or Grassmann-type relations for the ranks of intersections of subactions of free actions. The coset action of the free group is used to establish a generalization of the Schreier formula in the case of subgroups of infinite index. We also study and apply large modules over free associative and free group algebras. 相似文献
373.
Xin Tang 《Frontiers of Mathematics in China》2008,3(3):371-397
In this paper, we construct families of irreducible representations for a class of quantum groups U
q
(ƒ
m
(K)). First, we give a natural construction of irreducible weight representations for U
q
(ƒ
m
(K)) using methods in spectral theory developed by Rosenberg. Second, we study the Whittaker model for the center of U
q
(ƒ
m
(K)). As a result, the structure of Whittaker representations is determined, and all irreducible Whittaker representations are
explicitly constructed. Finally, we prove that the annihilator of a Whittaker representation is centrally generated.
相似文献
374.
375.
376.
Yuri Nikolayevsky 《Geometriae Dedicata》2008,135(1):87-102
The structure of a solvable Lie group admitting an Einstein left-invariant metric is, in a sense, completely determined by
the nilradical of its Lie algebra. We give an easy-to-check necessary and sufficient condition for a nilpotent algebra to
be an Einstein nilradical whose Einstein derivation has simple eigenvalues. As an application, we classify filiform Einstein
nilradicals (modulo known classification results on filiform graded Lie algebras).
相似文献
377.
Jia Gui ZHU 《数学学报(英文版)》2005,21(3):563-568
Let H be a finite dimensional cosemisimple Hopf algebra, C a left H-comodule coalgebra and let C = C/C(H^*)^+ be the quotient coalgebra and the smash coproduct of C and H. It is shown that if C/C is a eosemisimple coextension and C is an injective right C-comodule, then gl. dim(the smash coproduct of C and H) = gl. dim(C) = gl. dim(C), where gl. dim(C) denotes the global dimension of coalgebra C. 相似文献
378.
Asahi Motoshige Yasuteru Mawatari Yoshiaki Yoshida Chigusa Seki Haruo Matsuyama Masayoshi Tabata 《Journal of polymer science. Part A, Polymer chemistry》2012,50(15):3008-3015
Polymerization of p‐n‐hexyloxyphenylacetylene (pHPA) by using a [Rh(norbornadine)Cl]2‐triethylamine catalyst was carried out at room temperature to afford stereoregular helical poly(p‐n‐hexyloxyphenylacetylene)s (PpHPAs). When ethanol and n‐hexane were used as polymerization solvents, a bright yellow PpHPAs, poly( Y ) with Mn = 8.5 × 104 and its purple red polymer, poly( R ) with Mn = 5.3 × 104 were obtained in 95% yields and 84% yields, respectively. Diffuse reflective UV–vis spectra of poly( Y ) and poly( R ) in solid phase showed different broad absorption peaks at 445 and 575 nm, respectively. X‐Ray diffraction patterns of poly( Y ) and poly( R ) showed typical columnar structures assignable to cis‐transoid and cis‐cisoid structures, respectively, which were also supported by molecule mechanics calculation. Poly( Y ) was irreversibly transformed to a reddish‐black polymer, poly( Y‐B ), which columnar diameter was nearly the same as that of poly( R ). Further, poly( Y ) showed an exothermic peak in the differential scanning calorimetry trace at 80 °C for 1 h in N2 gas. Thus, these findings suggest a thermally irreversible rearrangement from an unstable cis‐transoid form, poly( Y ) with a stretched cis‐transoid helix to a stable cis‐cisoid form, poly( R ), with a contracted cis‐cisoid helix in the solid phase to give poly( Y → B ) with the cis‐cisoid form. © 2012 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem, 2012 相似文献
379.
380.
YU Zu-Rong 《理论物理通讯》2001,(10)
With the help of su(2) algebra technique, a new equivalent form of the fractional Fourier transformation is given. Two examples are illustrated for their physical application in quantum optics.`` 相似文献