共查询到20条相似文献，搜索用时 63 毫秒
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文章从二重积分中值定理的基本形式和几何意义出发,找出二重积分中值定理成立的必要条件,将二重积分中值定理的连续性条件减弱为可积性和界值性,讨论了二重积分中值定理,利用界值性给出了二重积分中值定理的推广形式.进一步在二重积分中值定理函数连续性的基础上,增加了函数对两个变量的单调性(单调递增,单调递减),给出了二重积分中值定理的其它的推广形式,最后给出二重积分中值定理特殊情形,即定积分中值定理的推广形式. 相似文献
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极值性定理也是实数连续性定理之一,应将其纳入实数连续性定理的行列之中,从而使互相等价的实数连续性定理增至13个,对其等价性进行了论证。实数的连续性定理是中值定理的基础,在微分中值定理的建立过程中,依赖实数连续性定理进行了论证。 相似文献
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包丙寅 《赤峰学院学报(自然科学版)》2010,26(7):6-11
实数基本定理的内容及其等价性证明是数学分析课程中的难点和重点.本文全方面的给出了确界原理、单调有界原理、区间套定理、有限覆盖定理、致密性定理、柯西收敛原理这六个实数基本定理的等价性证明. 相似文献
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应用介值定理、微分中值定理和积分中值定理讨论了中值的存在性,并利用单调性或反证法讨论了中值的唯一性。 相似文献
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虽然许多数学分析教材为了整体的系统性对实数完备性定理做了必要的介绍,但都较简略,显得不够完善.本文旨在弥补这一缺憾,把古朴的Archimedes性质与重要的Dedekind连续性定理引入实数完备性基本定理的等价性循环论证中来,通过致密性定理证明Archimedes性质,而后由Archimedes性质推证Dedekind连续性定理,再根据已有的Dedekind连续性定理对确界原理的证明,给常见的实数完备性定理等价循环圈中补充两个新的成员,使人们对实数完备性定理的认识更详尽明瞭. 相似文献
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《洛阳师范学院学报》2016,(5):17-20
讨论了第一型曲面积分中值定理"正则中间点"的渐近性,得到了两个重要定理同时是定积分中值定理、二重积分中值定理"中间点"的渐近性相应结果的推广. 相似文献
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本文论述了实数完备性定理在数学分析中的重要地位,给出了实数完备性定理七个命题等价性的一个较简洁的循环证明也提出了教学中的一些注记,对教学分析中实数完备性定理的教学有一定的参考价值. 相似文献
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利用凸集分离定理,讨论了B-C-半预不变凸函数的择一性定理,并利用择一性定理,给出了带约束条件的向量优化问题解的优化条件。 相似文献
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谭伟明 《重庆第二师范学院学报》2004,17(3):7-8
教材[1]给出了一个可积的充分必要条件(定理1),即关于和数收敛的柯西准则.应用此定理证明关于函数的可积性问题总觉得相当麻烦,我们对此定理作一些改进,得到了定理2.应用定理2证明关于函数的可积性问题比用定理1证明要简便些. 相似文献
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四色定理和Ramsey定理是图论中重要的定理,本文运用模型论中的紧致性定理、图象定理等给出了这两个定理基于模型论方法的简短证明. 相似文献
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罗艳萍 《读与写:教育教学刊》2008,5(6)
The communication of people partially is the communication of cultures. Culture has a direct effect on international commercial activities in all aspects. Different conceptions about time, space, equality, law and the like, lead people to deal with things in different ways. So to know cultures of the counterpart is to facil-itate our enterprises so as to have a smooth and successful communication in commercial activity. 相似文献
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Richard Denner 《海外英语》2007,(4):14-15
Rosco and I wait for the fishermen to return.I sit at a wooden bench near the store at Mt.Baker Resort and watch the clouds change shape. Rosco has my belt around his neck and an eight foot tow chain hooked to a tree. Dogs must be on a leash. Ducks and rabbits are loose. 相似文献
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邱崇丙 《唐山师范学院学报》2014,(1):21-23
汉字的六书,《说文》对“转注”一类,语焉不详。后世学者提及转注,也仅限于许慎所举出的例字。《汉字例说》一文,作者从转注的角度综合考虑,对部分现代常用字作了分析,跟传统的解释有所不同。希望能抛砖引玉,互相切磋,以推进学术研究。 相似文献
14.
Given a graph G,a subgraph C is called a clique of G if C is a complete subgraph of G maximal under inclusion and |C|≥2. A clique-transversal set S of G is a set of vertices of G such that S meets all cliques of G. The clique-transversal number, denoted as TC (G), is the minimum cardinality of a clique-transversal set in G. The clique-graph of G, denoted as K (G), is the graph obtained by taking the cliques of G as vertices, and two vertices are adjacent if and only if the corresponding cliques in G have nonempty intersection. Let F be a class of graphs G such that F={G|K(G) is a tree}. In this paper the graphs in F having independent clique-transversal sets are shown and thus TC (G)/|G|≤1/2 for all G ∈ F. 相似文献
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《海外英语》2007,(5):10-11
Many college freshmen arrive woefully unprepared to do college work, and as disadvantaged populations continue to grow, the share of the American work force that has made it through college is expected to plummet. Many experts blame that educational failure not just on high schools but also on colleges. School & College, a special report by The Chronicle, looks at efforts to fix the system. What reforms would better prepare students for college? What should schools and colleges be doing differently? How should state and federal officials help? 相似文献
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陈美曦 《山东教育学院学报》2008,23(2):103-107
Different nations have different social cultures, and the social culture of every nation is developing with the development of the nation, language is greatly influenced by social culture, which enables language to possess national and historical characteristics. Word is the smallest, independent, meaningful linguistic unit of language. It can well reflect the national and historical characteristics. From synchronic aspect, the social and cultural influence on word meaning is mainly embodied in conceptual and associative meanings of word. The incorrespondence of word meaning is a phenomenon that exists in both conceptual and associative meanings of word among different languages. From diachronic aspect, the development of social culture causes some changes of word meaning to some extent. Therefore, social culture plays a key role in vocabulary learning and mastery of a language. 相似文献
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Rachel Zupek 《海外英语》2007,(11):40-41
我们绝大部分人都同意一件事情——我们喜欢金钱。但是你对金钱的喜欢之情足够到让你创立一份事业么?.财富通常被人忽视,主要在于人们不能真正了 相似文献
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YANGShiguo 《重庆大学学报(英文版)》2004,3(1):86-88
The problem on the geometrc inequalities involving an n-dimensional simplex and its inscribed simplex is studied. Aninequality is established, which reveals that the difference between the squared circumradius of the n-dimensional simplex andthe squared distance between its circumcenter and barycenter times the squared circumradius of its inscribed simplex is not lessthan the 2(n-1)th power of n times its squared inradius, and is equal to when the simplex is regular and its inscribed siplex is atangent point one. Deduction from this inequality reaches a generalization of n-dimensional Euler inequality indicating that thecircumradius of the simplex is not less than the n-fold inradius. Another inequality is derived to present the relationship betweenthe circumradius of the n-dimensional simplex and the circumradius and inradius of its pedal simplex. 相似文献