Firstly, the eigenvalue problem of a class of second order elliptic equation with critical potential and indefinite weights is considered. Then, using critical point theory, Trudinger-Moser inequality and the properties of the first eigenvalue, we prove the existence of a nontrivial solution for a class of nonlinear elliptic with critical potentialand indefinite weights in R~2. Secondly, we prove the existence of nontrivial solutions for a class of subcritical and critical elliptic systems with indefinite part in R~2 byusing a generalized linking theorem, Trudinger-Moser inequality and concentration-compactness principle.5. The existence of at least three weak solutions for discrete boundary value problem is established by using a three critical point theorem introduced by Ricceri.

首先亚洲www日本，討論了R~2中一類帶不定權(quán)且含臨界位勢的二階橢圓型方程的特征值問題国产三级伦吃奶在线播放，并借此特征值問題的第一特征值性質(zhì)欧美操逼视频看看，利用山路引理及Trudinger-Moser不等式黄片在线不卡永久免费看，證明了R~2中一類帶不定權(quán)且含臨界位勢的非線性橢圓型方程非平凡解的存在性亚洲欧美一区二区在线观看；其次，利用廣義環(huán)繞定理国内偷窥一区二区三区视频，Trudinger-Moser不等式及集中列緊原理大秀免费人成网站在线视频，得到了R~2上一類具有強(qiáng)不定部分的半線性橢圓型方程組在非線性項(xiàng)分別為次臨界增長和臨界增長情形下非平凡解的存在性。

Secondly, we study a class of automorphisms of A, i.e., we prove that the set {φ∈SL_n|φ= t is a subgroup of AutA(n,t,Finally, we mainly discuss some properties of the operation w in A, i.e., g~w = 0, f~w = 0 and Leibniz identity.

其次，討論了A的一類自同構(gòu)国产精品纯粹一区二区怡红院，即證明了集合{φ∈SL_n|φ=t}是自同構(gòu)群AutA(n欧美精选视频hh，t的一個(gè)子群；最后伊人久久影院，得到了A的運(yùn)算w的一些性質(zhì)黄片免费国产黄片免费国产黄片，即g~w=0、f~w=0和Leibniz等式被艹视频网站。

HE GAVE A PROFESSIONAL COMMENT ON THE NEW CAR.Although Eric is fond of big cars, as a matter of fact, the new C-Class is very familiar to him. Without the introduction of the writer, he gave a lot of opinion about C-280 Avantgarde. When compared with the old model, the new C-Class is much more sporty and does not lack the sense of grandeur which a Mercedes Benz has. Besides, its space is big enough and is suitable for the whole family.

雖然Eric鐘情大型車国产伊人A，原來他對新C-Class亦耳熟能詳，毋須筆者介紹亚洲乱人伦，已經(jīng)大談他對C280 Avantgarde的意見亚洲黄网在线观看视频，「新C-Class的設(shè)計(jì)，比起舊款實(shí)在Sporty得多日韩专区精品色情在线观看，又不失平治的豪華感国产精品无码毛片大全，加上空間夠大，一家大小使用亦可亚洲你懂得，年輕人一個(gè)人駕駛也適合一级3AAA片。

Uses a variety of techniques to stay in touch with parents and tell them class news：使用各種方式來與家長保持聯(lián)系并且告知家長班上所發(fā)生的事

The teacher reaches out to paren... | Uses a variety of techniques to stay in touch with parents and tell them class news 使用各種方式來與家長保持聯(lián)系并且告知家長班上所發(fā)生的事 | Is especially tenaciou...

characteristic class of a manifold：流形的示性類

characteristic class of a fibre bundle 纖維叢的示性類 | characteristic class of a manifold 流形的示性類 | characteristic cohomology class 上同調(diào)類特征

take a class of：擔(dān)任...班的教師

take a class at (Oxford) 在(牛津大學(xué))進(jìn)榮譽(yù)班 | take a class of 擔(dān)任...班的教師 | take classes in 聽...課, 選修...課程