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normal ultrafilter

См. также в других словарях:

  • Normal measure — In set theory, a normal measure is a measure on a measurable cardinal κ such that the equivalence class of the identity function on κ maps to κ itself in the ultrapower construction. Equivalently, if f:κ→κ is such that f(α)<α for most α<κ,… …   Wikipedia

  • Shelah cardinal — In axiomatic set theory, Shelah cardinals are a kind of large cardinals. A cardinal kappa is called Shelah iff for every f:kappa ightarrowkappa, there exists a transitive class N and an elementary embedding j:V ightarrow N with critical point… …   Wikipedia

  • Stone–Čech compactification — In the mathematical discipline of general topology, Stone–Čech compactification is a technique for constructing a universal map from a topological space X to a compact Hausdorff space beta; X . The Stone–Čech compactification beta; X of a… …   Wikipedia

  • metalogic — /met euh loj ik/, n. the logical analysis of the fundamental concepts of logic. [1835 45; META + LOGIC] * * * Study of the syntax and the semantics of formal languages and formal systems. It is related to, but does not include, the formal… …   Universalium

  • Measurable cardinal — In mathematics, a measurable cardinal is a certain kind of large cardinal number. Contents 1 Measurable 2 Real valued measurable 3 See also 4 References …   Wikipedia

  • Counterexamples in Topology —   Author(s) Lynn Arthur Steen J. Ar …   Wikipedia

  • Dirac delta function — Schematic representation of the Dirac delta function by a line surmounted by an arrow. The height of the arrow is usually used to specify the value of any multiplicative constant, which will give the area under the function. The other convention… …   Wikipedia

  • Cofinite — In mathematics, a cofinite subset of a set X is a subset Y whose complement in X is a finite set. In other words, Y contains all but finitely many elements of X . If the complement is not finite, but it is countable, then one says the set is… …   Wikipedia

  • Abzählbar kompakt — kompakter Raum berührt die Spezialgebiete Mathematik Topologie Analysis ist Spezialfall von topologischer Raum parakompakter Raum Lindelöf Raum …   Deutsch Wikipedia

  • Folgenkompakt — kompakter Raum berührt die Spezialgebiete Mathematik Topologie Analysis ist Spezialfall von topologischer Raum parakompakter Raum Lindelöf Raum …   Deutsch Wikipedia

  • Kompakt (Mathematik) — kompakter Raum berührt die Spezialgebiete Mathematik Topologie Analysis ist Spezialfall von topologischer Raum parakompakter Raum Lindelöf Raum …   Deutsch Wikipedia

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