null measure - definitie. Wat is null measure
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Wat (wie) is null measure - definitie

MEASURABLE SET WHOSE MEASURE IS ZERO
Measure zero; Zero measure; Lebesgue null set; Null-set; Measure-zero set; Null Set; Nullset; Zero content sets; Measure zero set; Set of measure zero; Set of measure 0; Measure 0 set
  • The [[Sierpiński triangle]] is an example of a null set of points in <math>\mathbb R^2</math>.

Null allele         
NONFUNCTIONAL ALLELE (A VARIANT OF A GENE) CAUSED BY A GENETIC MUTATION
Null mutation; Null Allele; Null alleles; Null mutant
A null allele is a nonfunctional allele (a variant of a gene) caused by a genetic mutation. Such mutations can cause a complete lack of production of the associated gene product or a product that does not function properly; in either case, the allele may be considered nonfunctional.
Null set         
In mathematical analysis, a null set N \subset \mathbb{R} is a measurable set that has measure zero. This can be characterized as a set that can be covered by a countable union of intervals of arbitrarily small total length.
Null (SQL)         
  • omega (ω)]] character is used to represent Null in [[database theory]].
  • outer join]] query with Null placeholders in the result set.  The Null markers are represented by the word <code>NULL</code> in place of data in the results.  Results are from [[Microsoft SQL Server]], as shown in SQL Server Management Studio.
SPECIAL MARKER AND KEYWORD IN SQL INDICATING THAT SOMETHING HAS NO VALUE
Sql null; NULL (SQL); NVL; NULLIF; SQL CASE; Sql case; Codd tables; Codd table; COALESCE; C-table; Uncertain database; NULL marks; Null (database)
In SQL, null or NULL is a special marker used to indicate that a data value does not exist in the database. Introduced by the creator of the relational database model, E.

Wikipedia

Null set

In mathematical analysis, a null set is a Lebesgue measurable set of real numbers that has measure zero. This can be characterized as a set that can be covered by a countable union of intervals of arbitrarily small total length.

The notion of null set should not be confused with the empty set as defined in set theory. Although the empty set has Lebesgue measure zero, there are also non-empty sets which are null. For example, any non-empty countable set of real numbers has Lebesgue measure zero and therefore is null.

More generally, on a given measure space M = ( X , Σ , μ ) {\displaystyle M=(X,\Sigma ,\mu )} a null set is a set S Σ {\displaystyle S\in \Sigma } such that μ ( S ) = 0. {\displaystyle \mu (S)=0.}