澳门网络赌场开户送彩金-网络赌场娱乐-注册娱乐城送体验金

學(xué)術(shù)預(yù)告 首頁(yè)  >  學(xué)術(shù)科研  >  學(xué)術(shù)預(yù)告  >  正文

學(xué)術(shù)預(yù)告-“Chemical Indices of Graphs with Degree Sequences”“Perfect codes in Cayley graphs”
作者:     日期:2017-06-29     來(lái)源:    

講座主題:Chemical Indices of Graphs with Degree Sequences

專(zhuān)家姓名:張曉東

工作單位:上海交通大學(xué)

講座時(shí)間:2017年7月1日9:30-10:30

講座地點(diǎn):數(shù)學(xué)學(xué)院340

主辦單位:煙臺(tái)大學(xué)數(shù)學(xué)與信息科學(xué)學(xué)院

內(nèi)容摘要:

The chemical indices such as the Wiener index, ABC index, Harry index, Zagreb Index etc, of a graph have received a lot of attention. In this talk, we introduce some progress and new results on these chemical indices of graphs with given degree sequences. In addition, some problems are concluded.

主講人介紹:

上海交通大學(xué)數(shù)學(xué)系教授,博士生導(dǎo)師,理學(xué)博士,世界華人數(shù)學(xué)家大會(huì)邀請(qǐng)報(bào)告人。主要研究領(lǐng)域包括隨機(jī)圖與復(fù)雜網(wǎng)絡(luò),譜圖理論,組合矩陣論等。曾經(jīng)在以色列理工學(xué)院、智利大學(xué)從事博士后研究工作,在美國(guó)加州大學(xué)圣地亞哥分校、韓國(guó)慶北大學(xué)和全北大學(xué)做高級(jí)訪(fǎng)問(wèn)學(xué)者。先后主持多項(xiàng)國(guó)家自然科學(xué)基金項(xiàng)目和參加973國(guó)家基礎(chǔ)科研基金資助項(xiàng)目、863 國(guó)家高科技發(fā)展基金資助項(xiàng)目、國(guó)家自然科學(xué)基金重點(diǎn)項(xiàng)目和上海市科委的重大研究項(xiàng)目等。獲得省科技進(jìn)步獎(jiǎng)兩項(xiàng)。已經(jīng)在國(guó)際上SCI期刊發(fā)表100多篇論文,其中部分的研究結(jié)果已經(jīng)被寫(xiě)入國(guó)外專(zhuān)著。目前擔(dān)任中國(guó)運(yùn)籌學(xué)會(huì)的圖論組合分會(huì)副理事長(zhǎng),并擔(dān)任兩個(gè)國(guó)際期刊的編委。

講座主題:Perfect codes in Cayley graphs

專(zhuān)家姓名:周三明

工作單位:墨爾本大學(xué)

講座時(shí)間:2017年7月3日10:00-11:00

講座地點(diǎn):數(shù)學(xué)學(xué)院340

主辦單位:煙臺(tái)大學(xué)數(shù)學(xué)與信息科學(xué)學(xué)院

內(nèi)容摘要:

A perfect t-code in a graph G = (V, E) is a subset C of V such that the t-neighbourhoods of the vertices in C form a partition of V, where t is a positive integer and the t-neighbourhood of a vertex is the set of vertices within distance t from it. Perfect t-codes in Hamming graph H(n, q) are precisely q-ary perfect t-codes of length n in the classical setting. A perfect 1-code in a graph is also called an efficient dominating set or independent perfect dominating set of the graph.

Let X be a group and S a subset of X which is inverse-closed and does not contain the identity element. The Cayley graph on X with respect to S is the graph with vertex set X such that two elements x, y are adjacent if and only if y = sx for some elements of S.

In this talk I will review recent progress on perfect 1-codes in Cayley graphs.

主講人介紹:

墨爾本大學(xué)數(shù)學(xué)與統(tǒng)計(jì)學(xué)院教授,澳大利亞組合數(shù)學(xué)會(huì)主席。由于數(shù)學(xué)研究上的成就,于 2003 年獲國(guó)際組合數(shù)學(xué)及其應(yīng)用學(xué)會(huì) Kirkman 獎(jiǎng), 2012-2015 年獲澳大利亞研究委員會(huì)“未來(lái)研究員”(Future Fellowship)稱(chēng)號(hào),為該計(jì)劃資助的少數(shù)幾位組合學(xué)家之一。發(fā)表九十幾篇學(xué)術(shù)論文,其中絕大部分發(fā)表在 SCI 雜志上,另有近二十篇論文已投稿或即將完成。研究領(lǐng)域包括代數(shù)圖論及其應(yīng)用、隨機(jī)圖過(guò)程、結(jié)構(gòu)圖論、組合優(yōu)化等,是國(guó)際上少數(shù)在代數(shù)圖論和隨機(jī)圖過(guò)程這兩個(gè)困難領(lǐng)域都有出色工作的組合數(shù)學(xué)家。