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# Topic: Measurable function

###### In the News (Wed 19 Jun 13)

 Spartanburg SC | GoUpstate.com | Spartanburg Herald-Journal   (Site not responding. Last check: 2007-09-17) In mathematics, a measure is a function that assigns a number, e.g., a "size", "volume", or "probability", to subsets of a given set. Measure theory is that branch of real analysis which investigates Ï-algebras, measures, measurable functions and integrals. The Haar measure for a locally compact topological group is a generalization of the Lebesgue measure and has a similar uniqueness property. www.goupstate.com /apps/pbcs.dll/section?category=NEWS&template=wiki&text=Measure_(mathematics)   (921 words)

 T.J. Kaczynski: Boundary functions for functions defined...   (Site not responding. Last check: 2007-09-17) Boundary functions for functions defined in a disk. The author proves several theorems on boundary functions in the following four cases: (1) f(z) a homeomorphism of D onto D, (2) f(z) a continuous function, (3) f(z) a Baire function and (4) f(z) a measurable function. In the cases of Baire functions and measurable functions, for the sake of convenience consider the open upper half-plane D www.rpi.edu /~bulloj/tjk/tjk2.html   (372 words)

 PlanetMath: measurable function The space of all Borel measurable functions from a measurable space Cross-references: measurable, characteristic function, subset, implies, extended real numbers, open sets, generated by, sigma algebra, topological space, range, real numbers, Borel sigma algebra, inverse image, words, function, measurable spaces This is version 14 of measurable function, born on 2002-07-21, modified 2006-12-09. planetmath.org /encyclopedia/MeasurableFunctions.html   (140 words)

 PlanetMath: example of function not Lebesgue Measurable with measurable level sets "example of function not Lebesgue Measurable with measurable level sets" is owned by cvalente. Cross-references: measurable set, measurable function, measurable, singleton, empty set, level sets, function, Vitali's Theorem This is version 4 of example of function not Lebesgue Measurable with measurable level sets, born on 2006-04-18, modified 2006-04-19. planetmath.org /encyclopedia/ExampleOfFunctionNotLebesgueMeasurableWithMeasurableLevelSets.html   (122 words)

 Additional Strategies Are Needed to EP function management has continued to place emphasis on the EPCRS programs, and the EPCRS continues to be the centerpiece of their efforts to maximize voluntary compliance, as stated in their FY 2003 Annual Work Plan. Management’s Response:  EP function management does not believe use of formal surveys is a feasible alternative in measuring the use of the SCP and establishing participation goals for this program. Management’s Response:  EP function management does not believe that the incidence of plan errors can be predicted and does not want to create a situation in which the establishment of program goals may affect either the examination selection process or the outcome of any case. www.ustreas.gov /tigta/auditreports/2003reports/200310190fr.html   (5702 words)

 T.J. Kaczynski: Boundary functions Next, we prove that a boundary function for a continuous function can always be made into a function of Baire class 1 by changing its values on a countable set of points. Conversely, we show that if t is a function mapping a set E (X into the Riemann sphere, and if t can be made into a function of Baire class 1 by changing its values on a countable set, then there exists a continuous function in H having t as a boundary function. (This is a slight generalization of a theorem of Bagemihl and Piranian.) In the second chapter we prove that a boundary function for a function of Baire class e > 1 in H is of Baire class at most e + 1. www.rpi.edu /~bulloj/tjk/tjk1.html   (394 words)

 Measurable - Webled.com Formally, a Measurable cardinal is a cardinal number ?? In mathematics, a Measurable cardinal is a ]... [ Measurable adj 1: possible to be measured; "Measurable depths" [syn: ]... www.webled.com /Measurable.htm   (454 words)

 Springer Online Reference Works   (Site not responding. Last check: 2007-09-17) are distribution functions of the discrete and the continuous type, respectively, is such a mixture. The distribution function of a continuous distribution is a continuous function. A distribution is absolutely continuous with respect to Lebesgue measure if and only if the corresponding distribution function is absolutely continuous (as a function of a real variable). eom.springer.de /c/c025620.htm   (290 words)

 Grace Chisholm Young Proceedings Abstract In this theorem no restriction whatever is laid on the primitive function, except tacitly that it is everywhere finite, and the derivates may be ordinary or taken with respect to any monotone increasing function g(x) without constant stretches. I propose now to enunciate and prove three fundamental theorems, already known to be true for special classes of functions, concerning the derivates of a function f(x), which, if not perfectly general, is nevertheless, for mathematical purposes, practically unrestricted in character. Each of these cases may occur at points of a set of any content, as is shown by examples, and all three cases may present themselves simultaneously for a single function f(x), or one or more of the cases may be altogether absent. www.agnesscott.edu /lriddle/women/abstracts/young_abstract3.htm   (447 words)

 [No title] Then the \$f_n\$ are measurable, and they converge to zero, but the sequence of their integrals does not converge to a limit. If a measurable function is real-valued, and is not of constant sign, we split the function into its ``positive'' and ``negative'' parts first, and find the integral of each part. In the case of complex-valued functions, this means that {\sl four\/} integrals have to be finite: the integrals of the positive and negative parts of the real part of the function, and the integrals of the positive and negative parts of the imaginary part of the function. www.math.umn.edu /~jodeit/course/Lebesgue05   (1712 words)

 Integration The Lebesgue integral, (3.3), uses approximation by functions constant on possibly quite nasty measurable sets, not just intervals as in the Riemann lower and upper integrals. One of the objects we wish to study is the space of integrable functions. It follows that each equivalence class under (3.9) has a representative which is an honest function, i.e. www-math.mit.edu /~rbm/18.155-F02/Lecture-notes/node5.html   (997 words)

 EE126 Commentaries 4: Jean Walrand Mathematically, one is given a probability space and some function X: If the outcome of the random experiment is w, then the value of the random variable is X(w) Î Â. An arbitrary real-valued function defined on W is not necessarily a random variable. Let X be a random variable and h: Â ® Â be a function. robotics.eecs.berkeley.edu /~wlr/126/w4.htm   (1043 words)

 FunctionDrawer The function will be evaluated at every screen pixel unless the domain is set using the initialize method. Creates the function drawer and initialzies the domain with the given values. Initialize the function range and the number of display points. www.opensourcephysics.org /download/api/org/opensourcephysics/display/FunctionDrawer.html   (310 words)

 Math Forum Discussions a set of zero measure was doing all the heavy lifting. The Dirichlet function is not at all pathological; it's an example The Math Forum is a research and educational enterprise of the Drexel School of Education. mathforum.org /kb/thread.jspa?threadID=87825&messageID=430642   (700 words)

 More Measure Theory in We shall show that these two approaches to measurable sets (Definitions 4.4 and 4.5) are equivalent in is a measurable characteristic function corresponding to the interval [a,b]. Our first notion (Definition 4.4) has the advantage of generality in that it applies to any measure on a compact separable metric space. www.math.psu.edu /simpson/papers/vitali-l2h/node4.html   (375 words)

 measurable - OneLook Dictionary Search Tip: Click on the first link on a line below to go directly to a page where "measurable" is defined. Phrases that include measurable: measurable function, measurable set, lebesgue measurable set, measurable disease, existence of non measurable sets, more... Words similar to measurable: measure, mensurable, quantitative, more... www.onelook.com /?w=measurable   (178 words)

 Math Forum Discussions > f is measurable iff the sets A= { x in X : f(x) = +oo}, > Proof: I can see why A and B are measurable, if f is measurable. > Let f be measurable and let a be a real number. mathforum.org /kb/thread.jspa?threadID=1174505&messageID=3844670   (329 words)

 Measurable Function - Kyrwiki at www.theponytail.net Measurable functions are very general constructs, and will include most functions we encounter. In probability theory a random variable is such a function. as well, then we will call the function just measurable. www.theponytail.net /wiki/pmwiki.php/Main/MeasurableFunction   (58 words)

 SEIKO Stopwatches - Presented by CEI » Measurable up to 10 hours in 1/100 of a second » Measures strokes per minute for events such as swimming and rowing » Measurable up to 100 hours in 1/100 of a second www.cei-ultrak.com /seiko/seiko.html   (377 words)

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