American foreign strategy has had strong continuity since World War II despite differences among successive presidents. Donald Trump's 2016 presidential campaign revealed ideas and goals for US strategy and strate...American foreign strategy has had strong continuity since World War II despite differences among successive presidents. Donald Trump's 2016 presidential campaign revealed ideas and goals for US strategy and strategy adjustment that differ significantly from those of predecessors. The decline in relative gains and rise in cost for US involvement in globalization are reasons for Trump to redirect US foreign strategy. The relative decrease of both US trade and foreign direct investment in the US, amid security threats and the identity crisis of the American people, has tremendously increased the pricetag for US involvement in globalization.展开更多
In this paper an existence theorem of positive radial solutions to a class of semilinear elliptic systems is proved by the Leray-Schauder degree theorem. Also, a nonexistence theorem is obtained. As an application of ...In this paper an existence theorem of positive radial solutions to a class of semilinear elliptic systems is proved by the Leray-Schauder degree theorem. Also, a nonexistence theorem is obtained. As an application of the main theorem, an example is given.展开更多
Let L be a L′evy process with characteristic measureν,which has an absolutely continuous lower bound w.r.t.the Lebesgue measure on Rn.By using Malliavin calculus for jump processes,we investigate Bismut formula,grad...Let L be a L′evy process with characteristic measureν,which has an absolutely continuous lower bound w.r.t.the Lebesgue measure on Rn.By using Malliavin calculus for jump processes,we investigate Bismut formula,gradient estimates and coupling property for the semigroups associated to semilinear SDEs forced by L′evy process L.展开更多
基金financially supported by a major project of the National SocialSciences Fund(Project 13&ZD049)
文摘American foreign strategy has had strong continuity since World War II despite differences among successive presidents. Donald Trump's 2016 presidential campaign revealed ideas and goals for US strategy and strategy adjustment that differ significantly from those of predecessors. The decline in relative gains and rise in cost for US involvement in globalization are reasons for Trump to redirect US foreign strategy. The relative decrease of both US trade and foreign direct investment in the US, amid security threats and the identity crisis of the American people, has tremendously increased the pricetag for US involvement in globalization.
基金This research is supported by the National Natural Science Foundation of China (No.10371116 and 10101024).
文摘In this paper an existence theorem of positive radial solutions to a class of semilinear elliptic systems is proved by the Leray-Schauder degree theorem. Also, a nonexistence theorem is obtained. As an application of the main theorem, an example is given.
文摘Let L be a L′evy process with characteristic measureν,which has an absolutely continuous lower bound w.r.t.the Lebesgue measure on Rn.By using Malliavin calculus for jump processes,we investigate Bismut formula,gradient estimates and coupling property for the semigroups associated to semilinear SDEs forced by L′evy process L.
