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148 (number)
148 (one hundred ndforty-eight) is the natural number following 147 and before 149. In mathematics 148 is the second number to be both a heptagonal number and a centered heptagonal number (the first is 1). It is the twelfth member of the Mian–Chowla sequence, the lexicographically smallest sequence of distinct positive integers with distinct pairwise sums. There are 148 perfect graphs with six vertices, and 148 ways of partitioning four people into subsets, ordering the subsets, and selecting a leader for each subset. In other fields In the Book of Nehemiah 7:44 there are 148 singers, sons of Asaph, at the census of men of Israel upon return from exile. This differs from Ezra 2:41, where the number is given as 128. Dunbar's number is a theoretical cognitive limit to the number of people with whom one can maintain stable interpersonal relationships. Dunbar predicted a "mean group size" of 148, but this is commonly rounded to 150. See also * The year AD 148 or 148 BC _ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Natural Number
In mathematics, the natural numbers are those numbers used for counting (as in "there are ''six'' coins on the table") and ordering (as in "this is the ''third'' largest city in the country"). Numbers used for counting are called ''Cardinal number, cardinal numbers'', and numbers used for ordering are called ''Ordinal number, ordinal numbers''. Natural numbers are sometimes used as labels, known as ''nominal numbers'', having none of the properties of numbers in a mathematical sense (e.g. sports Number (sports), jersey numbers). Some definitions, including the standard ISO/IEC 80000, ISO 80000-2, begin the natural numbers with , corresponding to the non-negative integers , whereas others start with , corresponding to the positive integers Texts that exclude zero from the natural numbers sometimes refer to the natural numbers together with zero as the whole numbers, while in other writings, that term is used instead for the integers (including negative integers). The natural ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Asaph (Bible)
Asaph ( he, אָסָף ''’Āsāp̄'', "Gather"A concise English-Hebrew Dictionary'' by H. Danby and M. H. Segal, Dvir Publishing, Tel Aviv, 1962) is the name of three men from the Hebrew bible. The articles related to the son of Berachiah and descendant of Kohath refer to the same person. * Asaph, the father of Joah () * Asaph, son of Berachiah the Gershonite () Together with Heman, the grandson of the Israelite prophet Samuel (, or 1 Chronicles 6:39 in non-Hebrew translations), he and his male descendants were set aside by King David to worship God in song and music (). He authored Psalm 50, and Psalms 73 to 83. * Asaph, a Levite descendant of Kohath () * Asaph, the keeper of the king's forest under the Persian king Artaxerxes I Longimanus () See also *Psalms of Asaph *Psalms The Book of Psalms ( or ; he, תְּהִלִּים, , lit. "praises"), also known as the Psalms, or the Psalter, is the first book of the ("Writings"), the third section of the Tanakh, and a b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
148 BC
__NOTOC__ Year 148 BC was a year of the pre-Julian Roman calendar. At the time it was known as the Year of the Consulship of Magnus and Caesoninus (or, less frequently, year 606 ''Ab urbe condita''). The denomination 148 BC for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years. Events By place Ireland * Corlea Trackway built in County Longford Roman Republic * With the defeat of Andriscus in the Battle of Pydna by Quintus Caecilius Metellus Macedonicus, Macedon is reorganized as a Roman province by 146 BC. * Construction of the Via Postumia, linking Aquileia and Genua. * Publius Cornelius Scipio Aemilianus divides Numidia among the three sons of the recently deceased Masinissa. Births * Deaths * Liu Rong, Chinese crown prince of the Han Dynasty * Masinissa, king of Numidia (b. c. 238 BC) * Yuan Ang Yuan Ang ( Chinese: , ''Yuán Àng''; died 148 BC) was a Han minist ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
AD 148
Year 148 ( CXLVIII) was a leap year starting on Sunday (link will display the full calendar) of the Julian calendar. At the time, it was known as the Year of the Consulship of Cornelius and Calpernius (or, less frequently, year 901 '' Ab urbe condita''). The denomination 148 for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years. Events By place Roman Empire Emperor Antoninus Pius hosts a series of grand games, to celebrate Rome's 900th anniversary. Asia * An Shigao arrives in China. By topic Religion * Euzois succeeds Athendodorus, as Patriarch of Constantinople. Births * Xun Yue (or Zhongyu), Chinese official and historian (d. 209 Year 209 ( CCIX) was a common year starting on Sunday (link will display the full calendar) of the Julian calendar. At the time, it was known as the Year of the Consulship of Commodus and Lollianus (or, less frequently, year 962 ' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Interpersonal Relationship
The concept of interpersonal relationship involves social associations, connections, or affiliations between two or more people. Interpersonal relationships vary in their degree of intimacy or self-disclosure, but also in their duration, in their reciprocity and in their power distribution, to name only a few dimensions. The context can vary from family or kinship relations, friendship, marriage, relations with associates, work, clubs, neighborhoods, and places of worship. Relationships may be regulated by law, custom, or mutual agreement, and form the basis of social groups and of society as a whole. Interpersonal relationships are created by people's interactions with one another in social situations. This association of interpersonal relations being based on social situation has inference since in some degree love, solidarity, support, regular business interactions, or some other type of social connection or commitment. Interpersonal relationships thrive through equita ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dunbar's Number
Dunbar's number is a suggested cognitive limit to the number of people with whom one can maintain stable social relationships—relationships in which an individual knows who each person is and how each person relates to every other person. This number was first proposed in the 1990s by British anthropologist Robin Dunbar, who found a correlation between primate brain size and average social group size. By using the average human brain size and extrapolating from the results of primates, he proposed that humans can comfortably maintain 150 stable relationships. There is some evidence that brain structure predicts the number of friends one has, though causality remains to be seen. Dunbar explained it informally as "the number of people you would not feel embarrassed about joining uninvited for a drink if you happened to bump into them in a bar." Dunbar theorised that "this limit is a direct function of relative neocortex size, and that this, in turn, limits group size ..the limit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Book Of Ezra
The Book of Ezra is a book of the Hebrew Bible; which formerly included the Book of Nehemiah in a single book, commonly distinguished in scholarship as Ezra–Nehemiah. The two became separated with the first printed rabbinic bibles of the early 16th century, following late medieval Latin Christian tradition. Composed in Hebrew and Aramaic, its subject is the Return to Zion following the close of the Babylonian captivity, and it is divided into two parts, the first telling the story of the first return of exiles in the first year of Cyrus the Great (538 BC) and the completion and dedication of the new Temple in Jerusalem in the sixth year of Darius I (515 BC), the second telling of the subsequent mission of Ezra to Jerusalem and his struggle to purify the Jews from marriage with non-Jews. Together with the Book of Nehemiah, it represents the final chapter in the historical narrative of the Hebrew Bible. Ezra is written to fit a schematic pattern in which the God of Is ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Israel
Israel (; he, יִשְׂרָאֵל, ; ar, إِسْرَائِيل, ), officially the State of Israel ( he, מְדִינַת יִשְׂרָאֵל, label=none, translit=Medīnat Yīsrāʾēl; ), is a country in Western Asia. It is situated on the southeastern shore of the Mediterranean Sea and the northern shore of the Red Sea, and shares borders with Lebanon to the north, Syria to the northeast, Jordan to the east, and Egypt to the southwest. Israel also is bordered by the Palestinian territories of the West Bank and the Gaza Strip to the east and west, respectively. Tel Aviv is the economic and technological center of the country, while its seat of government is in its proclaimed capital of Jerusalem, although Israeli sovereignty over East Jerusalem is unrecognized internationally. The land held by present-day Israel witnessed some of the earliest human occupations outside Africa and was among the earliest known sites of agriculture. It was inhabited by the Canaanites ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Book Of Nehemiah
The Book of Nehemiah in the Hebrew Bible, largely takes the form of a first-person memoir concerning the rebuilding of the walls of Jerusalem after the Babylonian exile by Nehemiah, a Jew who is a high official at the Persian court, and the dedication of the city and its people to God's laws (Torah). Since the 16th century, it has generally been treated as a separate book within the Bible. Before that date, it had been included in the Book of Ezra; but in Latin Christian Bibles from the 13th century onwards, the Vulgate Book of Ezra was divided into two texts, called respectively the First and Second books of Ezra; a separation which became canonised with the first printed bibles in Hebrew and Latin. Mid 16th century Reformed Protestant Bible translations produced in Geneva were the first to introduce the name 'Book of Nehemiah' for the text formerly called the 'Second Book of Ezra'. Summary The events take place in the second half of the 5th century BC. Listed together with the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
147 (number)
147 (one hundred ndforty-seven) is the natural number following 146 and preceding 148. In mathematics 147 is the fourth centered icosahedral number. These are a class of figurate numbers that represent points in the shape of a regular icosahedron or alternatively points in the shape of a cuboctahedron, and are magic numbers for the face-centered cubic lattice. Separately, it is also a magic number for the diamond cubic. It is also the fourth Apéry number a_3, where a_n=\sum_^n\binom^2\binom. There are 147 different ways of representing one as a sum of unit fractions with five terms, allowing repeated fractions, and 147 different self-avoiding polygonal chains of length six using horizontal and vertical segments of the integer lattice. In other fields 147 is the highest possible break in snooker, in the absence of fouls and refereeing errors. In some traditions, there are 147 psalms. However, current Christian and Jewish traditions list a larger number, leading to the sugg ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vertex (graph Theory)
In discrete mathematics, and more specifically in graph theory, a vertex (plural vertices) or node is the fundamental unit of which graphs are formed: an undirected graph consists of a set of vertices and a set of edges (unordered pairs of vertices), while a directed graph consists of a set of vertices and a set of arcs (ordered pairs of vertices). In a diagram of a graph, a vertex is usually represented by a circle with a label, and an edge is represented by a line or arrow extending from one vertex to another. From the point of view of graph theory, vertices are treated as featureless and indivisible objects, although they may have additional structure depending on the application from which the graph arises; for instance, a semantic network is a graph in which the vertices represent concepts or classes of objects. The two vertices forming an edge are said to be the endpoints of this edge, and the edge is said to be incident to the vertices. A vertex ''w'' is said to be ad ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Perfect Graph
In graph theory, a perfect graph is a graph in which the chromatic number of every induced subgraph equals the order of the largest clique of that subgraph (clique number). Equivalently stated in symbolic terms an arbitrary graph G=(V,E) is perfect if and only if for all S\subseteq V we have \chi(G =\omega(G . The perfect graphs include many important families of graphs and serve to unify results relating colorings and cliques in those families. For instance, in all perfect graphs, the graph coloring problem, maximum clique problem, and maximum independent set problem can all be solved in polynomial time. In addition, several important min-max theorems in combinatorics, such as Dilworth's theorem, can be expressed in terms of the perfection of certain associated graphs. A graph G is 1-perfect if and only if \chi(G)=\omega(G). Then, G is perfect if and only if every induced subgraph of G is 1-perfect. Properties * By the perfect graph theorem, a graph G is perfect if and on ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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