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# Topic: Compact sets

###### In the News (Fri 24 May 19)

 Analysis WebNotes: Chapter 06, Class 34 A set is compact if whenever we cover it with infinitely many open sets, there is always enough redundancy in the covering that we can select finitely many of the covering sets to do the job. Although the hypotheses in the two statements are different (this example assumes that the domain is compact; Proposition 6.21 assumed that the domain was sequentially compact), the hypotheses ammount to the same. This is because compact metric spaces and sequentially compact metric spaces are exactly the same things. www.math.unl.edu /~webnotes/classes/class34/class34.htm   (274 words)

 PlanetMath: proof of exhaustion by compact sets for $\mathbb{R}^n$ will be compact because it is the finite union of compact sets. Cross-references: argument, compact sets, union, finite, bounded set, contradiction, implies, closed, compact, boundary, radius, open ball, open set, bounded This is version 2 of proof of exhaustion by compact sets for www.planetmath.org /encyclopedia/ProofOfExhaustionByCompactSetsForMathbbRn.html   (107 words)

 PlanetMath: compact Note: Some authors require that a compact topological space be Hausdorff as well, and use the term quasi-compact to refer to a non-Hausdorff compact space. The modern convention seems to be to use compact in the sense given here, but the old definition is still occasionally encountered (particularly in the French school). This is version 6 of compact, born on 2001-10-25, modified 2004-03-28. planetmath.org /encyclopedia/Compact.html   (267 words)

 Dumbells & Dumbell Sets - www.sport-tiedje.com - The Fitness Specialists! The surface is coated to prevent slipping and ensure a safe grip. The innovative Hammer dumbbel set has three corners and cannot roll away. The Bowflex SelectTech Dumbbell set consists of 2 dumbbells. www.sport-tiedje.com /kurzhanteln.htm   (756 words)

 Compact Drum Sets A full size drum set is difficult to move from one place to another due to its heavy weight, and as a result, can be a challenge to maintain. Compact drum sets have small sized snare drums and brass drums along with a special low positioned snare stand that provides the right playing height and easy access to the rack toms. Compact drum sets are suited for young people who are in the process of learning music and require smaller drum sets for their cramped stages and rehearsals in college. ezinearticles.com /?Compact-Drum-Sets&id=428913   (509 words)

 Compact and Perfect Sets A set S of real numbers is called compact if every sequence in S has a subsequence that converges to an element again contained in S. A subset of sets from the collection C that still covers the set S is called a subcovering of S. Show that the Cantor set is compact (i.e. pirate.shu.edu /projects/reals/topo/compact.html   (732 words)

 Minnesota Compact Frequently Asked Questions   (Site not responding. Last check: ) The Minnesota Compact has not been developed in connection with any of the parties or the candidates, though former politicians are involved in advising the steering committee and in pulling together the organizations associated with the project. Compact staff and steering committee members will be working with these debate organizers to promote complementary, non-repetitive, creative formats (including mini-debates and formats directed at younger voters) and questions which follow up on candidate responses from previous debates. Compact organizers encourage the news media to make use of the standards in their general coverage and ad critiques and urge the public to use these standards in holding candidates, parties, and interest groups accountable for their campaign discourse. www.lwvmn.org /MNCompact/faqs.asp   (1480 words)

 Arizona Department of Gaming These compacts frequently provide for the allocation of criminal and civil jurisdiction between the State and the Indian Tribe for the enforcement of laws and regulations. All negotiated and signed compacts are sent to the U.S. Department of the Interior for approval and become effective as soon as they are published in the Federal Register. The compact specifically sets forth the types of permitted games, establishes technical standards for the gaming machines, authorizes the state to inspect casinos, requires background investigations and licensing of casino employees, and requires tribes to pay for at least a portion of the state's expenses for regulating tribal casinos. www.gm.state.az.us /compacts.htm   (305 words)

 Compact Size and Travel Backgammon Sets Its compact size of only 11 inches lets you have fun at home or on the road. This affordable and elegant backgammon set includes all accessories, and has a very pretty durable vinyl attache case enhanced by a nice burgundy stripe. The outside is a fl vinyl case with elegant red stripes, Inside, it has red and white inserts and chips, and a soft fl felt covering. www.1st-chess-sets.com /frnt_products.asp?category=backgammonsets&subcategory=21   (737 words)

 hyperspace Two compact subsets A and B of S are close to each other provided that every point in each of the subsets is close to some point in the other subset. Thus the two sets A and B in Figure 1 are not close, because the point x in A is far away from every point in B, whereas the two sets A and B in figure 2 are close to each other. We start with a compact metric space M and consider the collection H(M) consisting of all the subsets of M which are compact. www.spsu.edu /math/stricklen/Hyperspace/hyperspace.htm   (1827 words)

 Compact Sets   (Site not responding. Last check: ) A set S is compact if every collection of closed subsets of S with the finite intersection property has a nonempty intersection. A closed set in S comes from a closed set in T, whose complement is open in T. The open sets form a cover iff the closed sets in S have no intersection. The finite union of compact sets is compact. www.mathreference.com /top-cs,intro.html   (636 words)

 About Us - Compact Labeling Systems Compact Labelling Systems Compact is proud of our heritage of partnering with our customers to understand their business issues and the key complexities of their decoration challenges. This has provided Compact with the opportunity of supplying these components to OEM's to be fitted to their materials handling equipment in other parts of the world. Once again Compact leads the way; Generation 4 was launched in October 2003, a new control panel which customers have found to be even easier to use because of its mobile phone layout, and windows terminology menus. www.compactlabelling.com.au /about_us.htm   (587 words)

 FuncAna Compact and relatively compact sets in metric spaces. Local weak compactness of the dual spaces of normed vector spaces: closed bounded sets in the dual space are weakly compact. Local weak compactness of reflexive Banach spaces: closed bounded sets in a reflexive Banach space are weakly compact. www.math.ttu.edu /~vshubov/FuncAna/FuncAna.html   (947 words)

 Re: compact sets in metric spaces First given any set K, an open cover is a covering of that set by a collection of open sets O_alpha. A set K is compact if every open cover has a finite subcover. Let K be a compact set in X. Then given any collection of sets G_a such that K is in U G_a K in G_a_1 U... www.usenet.com /newsgroups/sci.math/msg08083.html   (535 words)

 Prove: Set Theory, closed sets and compact sets   (Site not responding. Last check: ) Let E and F be compact sets in R. Prove that E F is compact. Compactness with two equivalent norms - (See attached file for full problem description and symbols) --- Assume that and are two equivalent norms on X, and that. Compact spaces and finite sets - (See attached file for full problem description) --- • Prove that a set X with discrete topology is a compact topological space if and only if X is a finite set. www.brainmass.com /homework-help/math/other/60710   (295 words)

 Topological Properties The set S has an infinite number of members, since for any of the equalities, specifying the absolute value still leaves three degrees of freedom (if the domain had been x E R, then S would have had a finite number of elements). A compact set is a statement about the ability to find a finite number of open sets that cover a set, given any open cover. In other words, to be compact is to be closed and bound, to be closed and bound is to be compact. www.theworld.com /~sweetser/quaternions/intro/topology/topology.html   (1623 words)

 Cohen, Compact of Free Association The Compact sets forth the elements of the relationship between the United States and each of the FAS in four titles: Governmental Relations, Economic Relations, Security and Defense Relations and General Provisions. Under the terms of the Compact as originally negotiated, FAS citizens would have been eligible for Pell post-secondary education grants only for the first four years of the Compact; this four-year limitation was removed by Congress in legislation enacted in 1988. Second, we are working with the Compact negotiator to explore mechanisms to minimize the costs associated with migration, particularly including important Administration proposals for reform of the Compact to strengthen application of immigration laws. www.doi.gov /ocl/2002/compact.htm   (2171 words)

 Math Forum - Ask Dr. Math Archives: High School Sets Regard Q, the set of all rational numbers, as a metric space, with d(p,q)=p-q... Write a set that is equivalent to, but not equal to, the set (a, b, c, d, e, f). The Math Forum is a research and educational enterprise of the Drexel School of Education. mathforum.org /dr.math/tocs/sets.high.html   (810 words)

 HISTORY OF MINIMAL PAIRS OF COMPACT CONVEX SETS Since in all three cases the pairs of compact convex sets are not uniquely determined, minimal representations are of special importance. The general frame for the investigation of minimal pairs of nonempty compact convex sets is the the Radstrom -Hormander lattice over a topological vector space of pairs of nonempty compact convex sets (see [16], [30] and [34]). Invariants of minimal pairs of compact convex sets, as for instance the affine dimension or codimension of the union of a minimal pair, were studied in [29] and the amound of minimal pairs has been investigated by M. Wiernowolski [42]. www.staff.amu.edu.pl /~pairsets/ang/history/history.html   (502 words)

 Penn: The Penn Compact The Penn Compact is our vision to propel the University of Pennsylvania from excellence to eminence in all our core endeavors of teaching, research, and service. Under the Compact, we seek to retain and attract the very best faculty and students. The Compact sets the stage for our achieving eminence by embracing three principles that are deeply rooted in Penn’s proud history and distinct character: increased access; integrated knowledge; and local and global engagement. www.upenn.edu /compact   (353 words)

 Analysis WebNotes: Chapter 06, Class Ch06 Compactness is a tremendously useful property that some (the very nicest) metric spaces have. The results we prove in this chapter on the relationship between continuous functions and compact metric spaces lead to some of the most important and deepest results of this course. Powerful results such as Rolle's Theorem, the Mean Value Theorem and the Inverse function Theorem all come as fairly straightforward applications of the results on compactness that we prove in the first part of the chapter. www.math.unl.edu /~webnotes/classes/classCh06/classCh06.htm   (139 words)

 Defra, UK; The Compact The Compact is the agreement between the Government and the voluntary and community sector to improve their relationship for the benefit of each other and the communities they serve. At our Working Together Conference: Implementing the Compact Code on Funding and Procurement within Defra on 21st of February 2005 Feedback from delegates (both VCS and Defra) indicated that there was real confusion about how to apply Full Cost Recovery (FCR). The project will undertake a survey of both the Defra officials responsible for the two funds and a range of existing or (in the case of the RSCP) potential grant recipients from the VCS. www.defra.gov.uk /rural/communities/the-compact/default.htm   (182 words)

 Compact Sets Love is a big part of her life, and this heart shaped compact mirror tucked into a snug red pouch will always remind her that you care. And her engraved initials on the compact will keep it close to her heart for a long time. This sweet compact is just the right gift to give bridesmaids, the party hostess, or a dear friend on her birthday-it's that versatile. www.customizedfavorites.com /compact-sets   (200 words)

 Compactness The property of being a bounded set in a metric space is not preserved by homeomorphism. A compact subset of R with its usual metric is closed and bounded. The closed bounded interval is compact and hence its image is compact and hence is also a closed bounded subset which is in fact an interval also, by connectedness. www-groups.dcs.st-and.ac.uk /~john/MT4522/Lectures/L21.html   (704 words)

 Investment Compact for South East Europe   (Site not responding. Last check: ) The South East Europe Compact for Reform, Investment, Integrity and Growth ('Investment Compact') is a key component of the Stability Pact for South Eastern Europe, a framework agreement adopted in June 1999 by more than 40 countries and international and regional organisations as a shared strategy for ensuring stability and growth in the region. The Investment Compact is based on the working assumption that improvement of the investment climate and acceleration of economic reform through sound market-oriented policies are the only means to promote a vibrant private sector and increase foreign and domestic investment in the economy. The countries of South East Europe participating in the Investment Compact are: Albania, Bosnia and Herzegovina, Bulgaria, Croatia, the Former Yugoslav Republic of Macedonia, Moldova, Romania, and the Federal Republic of Yugoslavia: Serbia and Montenegro. www.oecd.org /document/34/0,2340,en_2649_34893_2073058_1_1_1_1,00.html   (532 words)

 Compact Studio Sets - Water Colour Sets - Colour Sets - Ziggy Art A great compact set for studio and field use that combines the ease of 3 tubes of Cotman and 16 half pans of Cotman Water Colour. The set is presented in a classy fl box, inside are 14 half pans, a brush, a cotamn postcard pad and a palette to hold the pans and facilitate mixing and wetting. This set is an excellent starter set containg 12 x 8ml tubes of Cotman Water Colour giving you a great starter palette of colours. www.ziggyart.co.uk /products/colour_sets/water_colour_sets/compact_studio_sets   (928 words)

 Math Forum Discussions This seems complicated to me. In general a compact set is one that has the property that any open covering of it can be reduced to a finite subcovering. a compact set is any set which is closed and bounded. Furthermore an arbitrary intersection of closed sets is closed and so an arbitrary intersection of compact sets is compact. mathforum.org /kb/thread.jspa?messageID=3710833&tstart=0   (150 words)

 The History Place - Early Colonial Era   (Site not responding. Last check: ) The Compact sets the precedent for other colonies as they set up governments. sets up the office of customs commissioner in the colonies to collect duties on goods that pass between plantations. A special court is then set up by the governor of Massachusetts. www.historyplace.com /unitedstates/revolution/rev-early.htm   (1939 words)

 Re: compact sets in metric spaces On Mon, 29 Sep 2003, Daniel C Bastos wrote: > Theorem: compact sets of metric spaces are closed. Thus the set K is not in X, it's a subset of X. > Suppose p in X and p is not in K. If q is in K, let V_q and W_q be > neighborhoods of p and q. Since K is compact, there are finitely many > points q_1,... www.usenet.com /newsgroups/sci.math/msg08032.html   (348 words)

 New Phones Out Now - Mobile Gazette - Mobile Phone News Compact clamshell, exclusive to Virgin Mobile in the UK. Compact 3G music phone, exclusive to the Vodafone network. Compact 3G slider that's also one of O2's first i-mode phones. www.mobilegazette.com /out-now.htm   (1084 words)

 Miroslav Zeleny   (Site not responding. Last check: ) Let E be a compact metric space, \Cal K(E) be the space of all closed subsets of E with the Hausdorff metric. The theory of \sigma -ideals of compact sets was developed by Kechris, Louveau and Woodin. Their results on the structure of \sigma -ideals of compact sets were used by Debs and Saint-Raymond to give a positive answer to the old question, whether every Borel U -set is meager. www.utm.edu /staff/jschomme/topology/c/a/a/j/124.htm   (312 words)

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