关于Ramsey数下界的部分结果

来源 :数学的实践与认识 | 被引量 : 0次 | 上传用户:mimidong
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
本文得到Ramsey数下界的一个计算公式:R(l,s+t-2)≥R(l,s)+R(l,t)-1,(式中l,s,t≥3). 用此公式算得的Ramsey数的下界比用其它公式算得的下界好.
其他文献
通过两个中高剪力墙模型的试验研究,比较分析了底部带暗支撑中高剪力墙与普通中高剪力墙的抗震性能。建立了承载力计算模型与方法,计算结果与实测值符合较好。 Through the ex
BACKGROUND:?Liver cell transplantation and bioartiifcial liver may provide metabolic support of liver function temporary and are prospective treatments for pati
总结了我国塑料门窗型材行业及相关助剂行业的现状,并提出改进建议和看法.当前制约PVC塑料门窗型材性能价格比发展的瓶颈问题出自各类加工和功能助剂的生产及研发不能满足市
BACKGROUND:?Caudate lobectomy has long been considered technically dififcult. This study aimed to elaborate the signiifcance of early control of short hepatic p
BACKGROUND:Cholangiocarcinoma is a very aggressive tumor with poor survival.Therefore,early diagnosis and surgical resection are of paramount importance.Its dia
本文在[1]等成果的基础上,对振荡函数数值积分的方法做了进一步的探讨,给出了一种代数精确度更高、具有函数振荡越剧烈求积结果越精确的特点的、优于[1]的新的对振荡函数的Ga
BACKGROUND:?While suppressor of cytokine signaling 3 (SOCS3) plays a crucial role in suppressing dysplasia and tumorigenesis, it also offers a typical instance
同其它模具成形技术一样,在管线钢管的机械扩径工艺中,扩径模具工作部分的形状与尺寸,对成形过程具有重要影响.深入了解这两者之间的内在关系,是研究管线钢管机械扩径工艺的
BACKGROUND:?Phospholipid scramblase 1 (PLSCR1) not only participates in the transbilayer movement of phospholipids, but also plays a role in the pathogenesis an
Terlipressin has been shown to improve both pulmonary and systemic hemodynamics in stable cirrhotic patients with pulmonary hypertension, whereas other vasocons