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Hyeonmi Lee 《Transactions of the American Mathematical Society》2006,358(4):1847-1867
We give a new realization of arbitrary level perfect crystals and arbitrary level irreducible highest weight crystals of type , in the language of Young walls. We refine the notions of splitting of blocks and slices that have appeared in our previous works, and these play crucial roles in the construction of crystals. The perfect crystals are realized as the set of equivalence classes of slices, and the irreducible highest weight crystals are realized as the affine crystals consisting of reduced proper Young walls which, in turn, are concatenations of slices.
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Georgia Benkart Seok-Jin Kang Hyeonmi Lee Kailash C. Misra Dong-Uy Shin 《Compositio Mathematica》2001,126(1):91-111
We prove that the multiplicity of an arbitrary dominant weight for an irreducible highest weight representation of the affine Kac–Moody algebra A
(1)
r
is a polynomial in the rank r. In the process we show that the degree of this polynomial is less than or equal to the depth of the weight with respect to the highest weight. These results allow weight multiplicity information for small ranks to be transferred to arbitrary ranks. 相似文献
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We give a realization of crystal graphs for basic representations of the quantum affine algebra U
q
(C
n
(1)
) using combinatorics of Young walls. The notion of splitting blocks plays a crucial role in the construction of crystal graphs.
This work was supported by KOSEF Grant #98-0701-01-5-L and the Young Scientist Award, Korean Academy of Science and Technology.
This work was supported by BK21 Project, Mathematical Sciences Division, Seoul National University. 相似文献
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Rae-Kwon Kim Yongjoon Suh Ki-Chun Yoo Yan-Hong Cui Hyeonmi Kim Min-Jung Kim In Gyu Kim Su-Jae Lee 《Experimental & molecular medicine》2015,47(1):e137
Basal-type breast cancers are among the most aggressive and deadly breast cancer subtypes, displaying a high metastatic ability associated with mesenchymal features. However, the molecular mechanisms underlying the maintenance of mesenchymal phenotypes of basal-type breast cancer cells remain obscure. Here, we report that KRAS is a critical regulator for the maintenance of mesenchymal features in basal-type breast cancer cells. KRAS is preferentially activated in basal-type breast cancer cells as compared with luminal type. By loss and gain of KRAS, we found that KRAS is necessary and sufficient for the maintenance of mesenchymal phenotypes and metastatic ability through SLUG expression. Taken together, this study demonstrates that KRAS is a critical regulator for the metastatic behavior associated with mesenchymal features of breast cancer cells, implicating a novel therapeutic target for basal-type breast cancer. 相似文献
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Seok-Jin Kang Jeong-Ah Kim Hyeonmi Lee Dong-Uy Shin 《Transactions of the American Mathematical Society》2004,356(6):2349-2378
In this paper, we give a new realization of crystal bases for finite-dimensional irreducible modules over classical Lie algebras. The basis vectors are parameterized by certain Young walls lying between highest weight and lowest weight vectors.
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Using combinatorics of Young walls, we give a new realization of arbitrary level irreducible highest weight crystals for quantum affine algebras of type , , , , , and . The irreducible highest weight crystals are realized as the affine crystals consisting of reduced proper Young walls. The notion of slices and splitting of blocks plays a crucial role in the construction of crystals.Presented by Peter Littelman. 相似文献
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Seokwoo Kang Hayoon Lee Beomjin Kim Hyeonmi Kang 《Molecular Crystals and Liquid Crystals》2015,618(1):66-73
Two emitting compounds, 9,10-bis-[1,1′;3′,1′′]terphenyl-5′-yl-1,5-di-o-tolyl-anthracene [TP-DTA-TP] and 9,10-bis-phenyl[1,1′;3′,1′′]triphenyl-5′-yl-1,5-di-o-tolyl-anthracene [TPB-DTA-TPB] based on new twisted core moiety were synthesized through boration, Suzuki reaction, and Sandmeyer reactions. EL performance was improved by varying the chemical structure of the side group. Physical properties such as optical, electrochemical, and electroluminescent properties were investigated. Synthesized compounds were used as an EML in OLED device: ITO / 2-TNATA (60nm) / NPB (15nm)/ TP-DTA-TP or TPB-DTA-TPB (35 nm) / Alq3 (20nm) / LiF (1nm) / Al (200nm). It was found that TPB-DTA-TPB showed higher luminance efficiency and better C.I.E. value than TP-DTA-TP device. 相似文献
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Hwangyu Shin Hyeonmi Kang Jong-Hyung Kim Yun-Fan Wang Hayoon Lee Garam Yang 《Molecular Crystals and Liquid Crystals》2015,618(1):38-46
Three new emitting compounds of 5P-VCB, 5P-VAn and 5P-VPy for OLED based on hexaphenylbenzene moiety were synthesized. Physical properties by the change of the substitution groups of the synthesized materials were systematically examined. Photoluminescence spectrum of the synthesized materials showed maximum emitting wavelengths of about 420~487 nm in solution state and 452~488 nm in film state, indicating blue emission color. OLED devices were fabricated by the synthesized compounds using vacuum deposition process as an emitting layer. Current efficiencies and CIE values of 5P-VCB, 5P-VAn and 5P-VPy were 1.76, 0.38 and 7.91 cd/A and (0.15, 0.07), (0.20, 0.31) and (0.20, 0.36), respectively. 相似文献