We study exterior powers of classes of symmetric bilinear forms in the Witt-Grothendieck ring of a field of characteristic not equal to 2, and derive their basi
For a right excellent extension S of a ring R, it is proved that R is right finitely ∑-CS if and only if S is the same. As an application of this result,a numb
读完史元明先生写的《好德好色:吴宓的坎坷人生》,心头有千言万语,都汇成一句:自是人生长恨水长东!rn唉!这个情痴,让人爱很不得!他的一生中与无数的女人纠缠不休,和哪一位女
Let p be a prime. The class of all p-soluble groups G such that every p-chief factor of G is cyclic and all p-chief factors of G are G-isomorphic is studied in
本研究选用来自安徽、江苏、山东等省的10个小麦品种（系）为试材，通过田间试验和室内分析，研究了10个小麦品种（系）的株高、穗长、千粒重等主要农艺性状，测定小麦面粉戊聚糖含量、直链淀粉含量、RVA参数和近红外参数等18个品质指标，以及面条蒸煮品质的8个指标，比较若干农艺性状和品质性状的品种间差异，分析小麦面粉品质与面条品质的相关性，探讨小麦面粉品质对其面条品质的影响；以“郑麦9023”与“皖麦48”
曼斯菲尔德是二十世纪英国著名的短篇小说家,她的短篇小说中存在大量的自恋人物。曼作品中的自恋人物常常在不切实际的幻想和无可奈何的现实之间徘徊,郁郁不得志,另外很多自
Let R be a nearring and G a faithful R-module. In this paper, we study the existence of idempotents in R mapping G onto a subgroup H of G that acts as the ident
随着我国经济的不断发展,我国的马铃薯加工业也迅速发展和不断壮大,但是我国过去马铃薯培育的品种都是以鲜食为主,培育的目标是高产和抗病性,对于加工型的品种培育较少,对加工品质重视不够。因此,我国应该从国外引进外国资源进行培育,培育出适合我国地理条件和气候条件的加工型品种。目前,荷兰马铃薯的育种工作在世界处于领先位置,因此我国应引进荷兰的优质种质资源进行培育,培育出适合我国的加工型品种。本研究用从荷兰种
A subgroup H of a group G is said to be c-supplemented in G if there exists a subgroup K of G such that G = HK and H∩K is contained in coreG(H).In this paper w
Let M be a monoid and let (0) be an endomorphism of M.We prove that if the Bruck-Reilly extension BR(M,(0)) is finitely presented,then the Bruck-Reilly extensio