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Topic: Relation (mathematics)


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In the News (Sun 18 Aug 19)

  
  Binary Relation
Relation, a mathematical concept, is a set of ordered pairs.
With the definition of a relation explicitly stated, one is able to not only construct examples, but also define an algebra (used vaguely, not as the mathematical concept in the branch of mathematics called algebra) on relations.
Another interesting topic in the study of relation is the study of relation on a set X. In this case, both the domain and range of the relation are subsets of X. On these relations, mathematicians use a few adjectives to describe the different elementary types of relation on a given set.
www.iscid.org /encyclopedia/Binary_Relation   (2105 words)

  
  Relation (mathematics) - Wikipedia, the free encyclopedia
Relations that involve two 'places' or 'roles' are called binary relations by some and dyadic relations by others, the latter being historically prior but also useful when necessary to avoid confusion with binary (base 2) numerals.
From the more abstract viewpoints of formal logic and model theory, the relation L is seen as constituting a logical model or a relational structure that serves as one of many possible interpretations of a corresponding k-place predicate symbol, as that term is used in predicate calculus.
Another variation reserves the term 'relation' to the corresponding logical entity, either the logical comprehension, which is the totality of intensions or abstract properties that all of the elements of the relation in extension have in common, or else the symbols that are taken to denote these elements and intensions.
en.wikipedia.org /wiki/Relation_(mathematics)   (1794 words)

  
 Relation - Wikipedia, the free encyclopedia
In mathematics, a relation is a generalization of arithmetic relations, such as "=" and "<", which occur in statements, such as "5 < 6" or "2 + 2 = 4".
In relational modeling, a relation is a set of tuples, otherwise known as a table.
In logic and philosophy, a relation is a two-argument property or predicate.
en.wikipedia.org /wiki/Relation   (151 words)

  
 Mathematics -Britannica Blog
A reasonable place to begin the story is with Galileo Galilei shortly after he was appointed to the chair of mathematics at the University of Padua in 1589.
A friend of mine who works in mathematics education buttonholed me to ask, “Why are you writing advice for young mathematicians?” The answer was that they’re not quite as young as he’d initially thought, and having read my book Letters to a Young Mathematician he was happy that I was qualified to write it.
Mathematics is a very misunderstood and unappreciated subject.
blogs.britannica.com /blog/main/category/mathematics   (3952 words)

  
 MATHEMATICS - LoveToKnow Article on MATHEMATICS
Two classes between which a one-one relation exists have the same cardinal number and are called cardinally similar; and the cardinal number of the class a is a certain class whose members are themselves classesnamely, it is the class composed of all those classes for which a one-one correlation with a exists.
Similarly, a class of serial relations, called well-ordered serial relations, can be defined, such that their corresponding relation-numbers include the ordinary finite ordinals, but also include relation-numbers which have many properties like those of the finite ordinals, though the fields of the relations belonging to them are not finite.
In pure mathematics the hypotheses which a set of entities are to satisfy are given, and a group of interesting deductions are sought.
www.1911encyclopedia.org /M/MA/MATHEMATICS.htm   (6790 words)

  
 Relativity, Einstein, time, science, D. & S. Birks
The movement of the earth in relation to light is abstractly represented in the pattern on the face of a clock, and in the grid pattern of a calendar.
Mathematical time, [T], is a system of measurement (expressed in the language of mathematics) that science has developed to indirectly measure absolute time; a mathematical system that is based upon, and derived from, the experience and measurement of the earth's movement relative to light.
Mathematically ludicrous, this mathematical approach to expressing the earth's velocity relative to light is the mathematical equivalent of a dog chasing its tail.
www.wbabin.net /physics/birks3.htm   (2802 words)

  
 Modern Mathematics . . . and Theology
Mathematical Truth Mathematical truth is explicitly defined and shown to correspond completely to the operational process of writing an acceptable mathematical proof.
Mathematical Modeling This process, the most important aspect for application to physical science and theology, is discussed in some detail.
Mathematical Truth and Its Correspondence to Discipline Truth In this short section, the exact correspondence between these two often distinct concepts is discussed.
www.serve.com /herrmann/math.htm   (7832 words)

  
 Study Guides for Discrete Mathematics
Relations, in their most intuitive form, are relationships between objects.
It is quite common for a relation to be defined on the crossproduct of set, say A, and itself, A X A. Relations may be illustrated by using matrices and graphs (see pages 356 and 357 in the text).
In plain language, a relation, R, is said to be symmetric iff the "reverse mate" of every ordered pair in the relation is also in the relation.
cs-netlab-01.lynchburg.edu /courses/discmath/Stud61.htm   (733 words)

  
 Relation
More formally, a relation is a subset (a partial collection) of the set of all possible ordered pairs (a, b) where the first element of each ordered pair is taken from one set (call it A), and the second element of each ordered pair is taken from a second set (call it B).
Notice that because a relation is a subset of all possible ordered pairs (a, b), some members of the set A may not appear in any of the ordered pairs of a particular relation.
Relations and functions of all sorts are important in every branch of science, because they are mathematical expressions of the physical relationships we observe in nature.
science.jrank.org /pages/5786/Relation.html   (684 words)

  
 MainFrame: The Foundations of Mathematics
Mathematics is a logical science, cleanly structured, and well-founded.
The methods of mathematics are deductive, and logic therefore has a fundamental role in the development of mathematics.
B.C., known as the classical period of Greek mathematics, mathematics was transformed from an ecclectic collection of practical techniques into a coherent structure of deductive knowledge.
www.rbjones.com /rbjpub/philos/maths/faq025.htm   (667 words)

  
 Aristotle and Mathematics
Mathematical examples: ‘line’ is in the definition of triangle, ‘point’ is in the definition of line.
Similarly, the explanatory relation between mathematical optics and geometry is not the same as the relation of optics to empirical optics.
The objects studied by mathematical sciences are perceptible objects treated in a special way, as a perceived representation, whether as a diagram in the sand or an image in the imagination.
plato.stanford.edu /entries/aristotle-mathematics   (9455 words)

  
 Mathematics Teachers’ Competence in Relation to Stundents’ Performance in National High Schools of Dapitan City ...
The mathematics teachers were very much competent with mean of 4.24 as perceived by the students and much competent with mean of 4.02 as perceived by the teachers in terms of communication skills.
In general, the mathematics teachers were much competent as perceived by the students and the teachers with overall means of 4.13 and 3.97 respectively.
The performance of students in mathematics during the first and second grading periods was average with means of 2.72 and 2.85 respectively.
www.thesisabstracts.com /articles/publish/printer_126.shtml   (1152 words)

  
 Mathematics under the Microscope
My principal question is: how had mathematics managed to develop in a uniform standard language for the entire world, in a language which transcends and suppresses the logical subleties of natural languages in which mathematics is translated?
This is a manifestation of one of the paradigms of the computer science: if mathematicians instinctively seek to build their discipline around a small number of ``canonical'' (actually) infinite structures, computer scientists frequently prefer to work with a host of potential infinities controlled and handled with the help of category-theoretic technique.
[...] All this is quite genuine mathematics, and has its merits; but it is just that `proof by enumeration of cases' (and of cases which, at bottom, do not differ at all profoundly) which a real mathematician tends to despise.
www.maths.manchester.ac.uk /~avb/micromathematics   (2269 words)

  
 [No title]   (Site not responding. Last check: 2007-10-18)
The outskirts of mathematics are the outskirts of mathematical civilization.
Relations A relation on a set is a generalization of the concept of a function from S to itself.
There are lots and lots of relations in mathematics - inequality symbols, functions, subset symbols are all common examples of relations.
www.cs.buffalo.edu /~wli4/rubic/maths/sm485_1c.txt   (949 words)

  
 Topology
However, in Mathematics, a set A can be equivalently represented by its characteristic function ‑; a mapping XA from the universe X of discourse (region of consideration, i.e., a larger set) containing A to the 2‑value set [0,1): i.e.
In view of the fact that set theory is the cornerstone of modern mathematics, a new and more general framework of mathematics was established.
In classical topology, this relation is simple and clear: "An open set is a neighborhood of a point if and only if this point belongs to this open set." In early period of fuzzy topology, "membership relation" was similarly defined.
www.wordtrade.com /science/mathematics/topology.htm   (2132 words)

  
 dant.html   (Site not responding. Last check: 2007-10-18)
Neither relation is completely determined or completely undetermined, of course, since the stance one might take towards Yeats is not determined in advance, but nonetheless Joyce's mediaevalism is only in parts and to a small degree a matter of inheritance from a cultural milieu.
Yet the artist Dante as a human being nonetheless uses the methods of mathematics as he uses all forms of knowledge, precisely because for Dante there is no better expression of the infinite than in the failure of our attempts to understand and express it.
So the Euclidean mathematics is there to suggest Dante, and the placement of that mathematics and Ptolemaic cosmos in "Ithaca" suggests some of the ways in which Joyce's great novel is a formal imitation of Dante's great poem.
www.math.nmsu.edu /mines/raymines/dante.html   (3568 words)

  
 Abramovich, Fujii, and Wilson article
Relation 1 is a recursive definition of triangular numbers allowing the computation of any triangular number in terms of a number of the previous rank.
Due to Relation 2 one can graph the function y=x(x+1)/2 to get a visual image of triangular numbers in the form of points with integer coordinates that lie on a parabola (see Figure 5); that is, positive x-intercepts of the parabola with level lines y=tn represent a rank of the triangular number tn.
Mathematics visualization allows students to discover that there are pairs of triangular numbers such that the sum of the numbers in each pair is a triangular number.
jwilson.coe.uga.edu /Texts.Folder/AFW/AFWarticle.html   (8744 words)

  
 Study Guide for Discrete Mathematics
As with reflexivity and symmetry we may add elements to a relation R and create a new relation that is the transitive closure of R. However, the procedure may require an iterative process.
If there is a path from node a to node b in the digraph of a relation R then (a, b) is an element of the connectivity relation.
Since a relation represented as a subset of a crossproduct is equivalent to the relation represented as a matrix or a digraph, methods exist that enable one to find the transitive closure using matrix or graph operations.
cs-netlab-01.lynchburg.edu /courses/DiscMath/Stud64.htm   (665 words)

  
 Mathematics
This predicate relates a set or collection SUB to a set or collection SUPER whenever the extent (see #$extent) of SUB is a subset of the extent of SUPER.
When we said that there is a unique ordering relation R on S, we mean to ignore the difference between PRED1 and PRED2 when they are restricted to S, and treat the results of such restrictions the same, as far as they are used to talk about ORDER.
#$PartialOrdering because the #$subLists relation is reflexive, transitive and antisymmetric.
www.cyc.com /cycdoc/vocab/math-vocab.html   (5058 words)

  
 The Relation between High School Study of Foreign Languages and ACT English and Mathematics Performance   (Site not responding. Last check: 2007-10-18)
The measures of mathematics performance was the mathematics usage subtest score of the ACT assessment battery (ACTM).
For mathematics performance, the mean ACTM score for FLYES students was 17.37, whereas for FLNO students the mean was 15.85.
As figure 1 indicates, students who had completed more English and/or more mathematics course work tended to have slightly higher ACTE means, and students who had completed less English and/or less mathematics course work tended to have slightly lower ACTE means.
www.ade.org /adfl/bulletin/V23N3/OLD/233047.HTM   (1865 words)

  
 92.01.01: Mathematics in Relation to the Social & Economic History of the Public School System
Mathematics in Relation to the Social & Economic History of the Public School System
First, it will explore education on a national, state and local level, and second it will help students develop and enhance their problem solving skills in mathematics, pre-algebra and algebra I. To study American education is to study an incredibly vast and variegated enterprise.
Have one class invite the school superintendent into the school to speak to the class concerning the preparation of the annual school budget.
www.yale.edu /ynhti/curriculum/units/1992/1/92.01.01.x.html   (5353 words)

  
 UCLA Department of Mathematics
UCLA Mathematics Assistant Professor Joseph Teran, who joined the department this summer, is a featured speaker at the Intel Developer Forum Fall 2007.
The UCLA Department of Mathematics is delighted to announce the establishment of the Philip C. Curtis Jr.
The Clay Liftoff Fellowships are awarded to young mathematicians who have demonstrated mathematical research of quality and significance, and who show the potential to be leaders in their field.
www.math.ucla.edu   (953 words)

  
 Millennium Mathematics Project
The Millennium Mathematics Project (MMP) was set up within the University of Cambridge in 1999 as a joint project between the Faculties of Mathematics and Education.
In the videoconferencing sessions, prominent mathematicians and mathematical scientists talk to the students about why they chose to study maths and pursue research as a career, and then discuss their own research area.
Concepts relate to others through 'broader', 'narrower', 'references', 'referenced by' or 'see also' relations, and an innovative visual browser may be used to navigate this concept map.
mmp.maths.org /projects/nrich.html   (1688 words)

  
 [No title]
The ordering of the fields is unimportant, except that consistency must be maintained; that is, each column in the table contains values for a specific field in all of the tuples.
The number of tuples (rows) is called the cardinality of the relation.
This subset is called the primary key of the relation.
www.cs.umb.edu /~khsuyan/note/Session20.ppt   (499 words)

  
 WWW interactive multipurpose server
Bezout, calcule division euclidienne, pgcd, ppcm, relation de Bezout.
Barycentres: première S., relation de Chasles et barycentres partiels.
Base première de congruence, trouver un nombre premier de base pour une relation de congruence.
wims.unice.fr /wims/wims.cgi   (5961 words)

  
 Mathematics, Probability: Logarithms of Gambling Formula
As a matter of fact, the relation only deals with one element: the probability of N consecutive successes (or failures).
It is also the mathematics of God, or proving the inexistence of god mathematically.
Mathematical and logical algorithm, algorithms by using logarithm, logarithms.
www.saliu.com /formula.htm   (3760 words)

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