764 research outputs found
Representation of Original Sense of Chinese Characters by FOPC
PACLIC 20 / Wuhan, China / 1-3 November, 200
Higher theta series for unitary groups over function fields
In previous work, we defined certain virtual fundamental classes for special
cycles on the moduli stack of Hermitian shtukas, and related them to the higher
derivatives of non-singular Fourier coefficients of Siegel-Eisenstein series.
In the present article, we construct virtual fundamental classes in greater
generality, including those expected to relate to the higher derivatives of
singular Fourier coefficients. We assemble these classes into "higher" theta
series, which we conjecture to be modular. Two types of evidence are presented:
structural properties affirming that the cycle classes behave as conjectured
under certain natural operations such as intersection products, and
verification of modularity in several special situations. One innovation
underlying these results is a new approach to special cycles in terms of
derived algebraic geometry.Comment: Comments welcome
Modularity of higher theta series I: cohomology of the generic fiber
In a previous paper we constructed theta series for unitary
groups over function fields, and conjectured their modularity properties. Here
we prove the generic modularity of the -adic realization of higher theta
series in cohomology. The proof debuts a new type of Fourier transform,
occurring on the Borel-Moore homology of moduli spaces for shtuka-type objects,
that we call the . Another novelty in
the argument is a extending the classical
sheaf-function correspondence, which facilitates the deployment of
sheaf-theoretic methods to analyze algebraic cycles. Although the modularity
property is a statement within classical algebraic geometry, the proof relies
on derived algebraic geometry, especially a nascent theory of on derived vector bundles, which we develop
Higher Siegel--Weil formula for unitary groups: the non-singular terms
We construct special cycles on the moduli stack of unitary shtukas. We prove
an identity between (1) the r-th central derivative of non-singular Fourier
coefficients of a normalized Siegel--Eisenstein series, and (2) the degree of
special cycles of "virtual dimension 0" on the moduli stack of unitary shtukas
with r legs. This may be viewed as a function-field analogue of the
Kudla-Rapoport Conjecture, that has the additional feature of encompassing all
higher derivatives of the Eisenstein series.Comment: Minor revision
Effect of miR-384-targeting LINC00491 on proliferation, migration and invasion of tongue squamous cell carcinoma cells
Purpose: To investigate the effect of long-chain non-coding RNA LINC00491 (LncRNA LINC00491) on the proliferation, migration and invasion of tongue squamous cell carcinoma (TSCC) cells, and the underlying mechanism.
Methods: Real-time quantitative polymerase chain reaction (qRT-PCR) was applied to determine the expressions of LINC00491 and micro-RNA-384 (miR-384). Furthermore, LINC00491 and miR-384 were transfected into CAL-27 cells, while cell cycle was analyzed using flow cytometry. Cell proliferation was determined by methyl thiazolyl diphenyl-tetrazolium (MTT) assay. Cell migration and invasion were evaluated using Transwell experiments. The relationship between LINC00491 and miR-384 was confirmed using double luciferase reporting assay, while protein expression levels of P21, Ki67, E- cadherin, N-cadherin, and vimentin were assayed with Western blotting.
Results: The expression of LINC00491 increased in TSCC tissues (p < 0.05). The proportion of cells in G1-phase increased, while the proportion of cells in S-phase decreased (p < 0.05). There was decrease in cell survival, cell migration and cell invasion (p < 0.05). The protein expression levels of Ki67, N- cadherin, and vimentin were lowered, while those of P21, E-cadherin protein were increased (p < 0.05). Transfection of LINC00491 and miR- 384 reduced the proportion of cells in G1 phase, but increased the proportion of cells in S-phase (p < 0.05). Moreover, cell survival, migration and invasion were increased. The protein expressions of Ki67, N-cadherin, and vimentin rose, while those of P21 and E-cadherin decreased (p < 0.05).
Conclusion: LINC00491 promotes the proliferation, migration and invasion of TSCC cells by inhibiting miR-384. This finding provides a potential target for the treatment of TSCC
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