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...

Look up Null, null, a-null, or núll in Wiktionary, the free dictionary. Null may refer to: Nuller, an optical tool using interferometry to block certain...

sets, and so its support is the whole of Rn. If A is a Lebesgue-measurable set with λ(A) = 0 (a null set), then every subset of A is also a null set....

empty set. Any set other than the empty set is called non-empty. In some textbooks and popularizations, the empty set is referred to as the "null set". However...

SET NULL or SET DEFAULT is the same for both ON DELETE or ON UPDATE: the value of the affected referencing attributes is changed to NULL for SET NULL...

"having zero members in a set" (e.g., null set) to "having a value of zero" (e.g., null vector). In a vector space, the null vector is the neutral element...

Wikimedia Commons has media related to Null Island. Null Island is the location at zero degrees latitude and zero degrees longitude (0°N 0°E / 0°N 0°E...

The null sign (∅) is often used in mathematics for denoting the empty set. The same letter in linguistics represents zero, the lack of an element. It...

empty set (or null set) is the unique set that has no members. It is denoted ∅, ∅ {\displaystyle \emptyset } , { }, ϕ, or ϕ. A singleton set is a set with...

real numbers and the empty set—the unique set containing no elements. The empty set is also occasionally called the null set, though this name is ambiguous...

{\displaystyle \emptyset } , the empty set or the null set) {x} {y} {z} {x, y} {x, z} {y, z} {x, y, z} and hence the power set of S is {{}, {x}, {y}, {z}, {x...

set Q ∩ [ 0 , 1 ] {\displaystyle \mathbb {Q} \cap [0,1]} , the Cantor set C {\displaystyle {\mathcal {C}}} is "small" in the sense that it is a null set...

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...

hypothesis in which no relationship exists between two sets of data or variables being analyzed. If the null hypothesis is true, any experimentally observed...

of a null set of reals is a meagre set, and vice versa. In fact, the image of a set of reals under the map is null if and only if the original set was...

set theory, the axiom of empty set, also called the axiom of null set and the axiom of existence, is a statement that asserts the existence of a set with...

The null character (also null terminator) is a control character with the value zero. It is present in many character sets, including those defined by...

"NUL") Null sign (∅), the empty set Null (SQL) (ω), a special marker and keyword NULL in SQL Empty string (λ, Λ, or ε), in formal language theory Null (disambiguation)...

the null set Z {\displaystyle Z} ). We can thus consider the f n {\displaystyle f_{n}} and f {\displaystyle f} as being defined except for a set of μ...

{\displaystyle X} is: timelike if g ( X , X ) < 0 {\displaystyle \,g(X,X)<0} null or lightlike if g ( X , X ) = 0 {\displaystyle \,g(X,X)=0} spacelike if g...

closely related to its cardinal number: a set is uncountable if its cardinal number is larger than aleph-null, the cardinality of the natural numbers....

measurable set X {\displaystyle X} is called a null set if μ ( X ) = 0. {\displaystyle \mu (X)=0.} A subset of a null set is called a negligible set. A negligible...

Null modem is a communication method to directly connect two DTEs (computer, terminal, printer, etc.) using an RS-232 serial cable. The name stems from...

complete measure space) is a measure space in which every subset of every null set is measurable (having measure zero). More formally, a measure space (X...

for example the Lipschitz functions, whose set of non-differentiability points must be a Lebesgue null set (Rademacher's theorem). When we try to draw...

{\mathcal {A}}\mid \nu (A)=0\}} be the sets of μ {\displaystyle \mu } -null sets and ν {\displaystyle \nu } -null sets, respectively. Then the measure ν {\displaystyle...

{0} .} The set of solutions to this equation is known as the null space of the matrix. For example, the subspace described above is the null space of the...

Nullable types are a feature of some programming languages which allow a value to be set to the special value NULL instead of the usual possible values...

the limit of a sequence, and null sets can be ignored when studying the integral of a measurable function. Negligible sets define several useful concepts...

dense set Bounded set Totally bounded set Borel set Baire set Measurable set, Non-measurable set Universally measurable set Negligible set Null set Haar...