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Topics referred to by the same term
Look up Null, null, a-null, núll, or Nullus in Wiktionary, the free dictionary. Null may refer to: Nuller, an optical tool using interferometry to block
Null
Signature pavilion at Expo 2025
null² (Japanese: ヌルヌル, pronounced Nurunuru) was a Signature Pavilion at the Expo 2025 Osaka, Kansai, Japan, held on Yumeshima Island in Osaka. It was produced
Null²
Device file that discards all data written to it
the null device is a device file that discards all data written to it but reports that the write operation succeeded. This device is called /dev/null on
Null_device
Cartographical (only) marker at 0°N, 0°E
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
Null_Island
Topics referred to by the same term
up null or ␀ in Wiktionary, the free dictionary. Null symbol may refer to: Null character, U+0000 <control-0000> , Null sign (∅), the empty set Null (SQL)
Null_symbol
Mathematical representation of absence of a value
In mathematics, the word null (from German: null[citation needed] meaning "zero", which is from Latin: nullus meaning "none") is often associated with
Null_(mathematics)
Control character with value 0
The null character is a control character with the value zero. Many character sets include a code point for a null character – including Unicode (Universal
Null_character
Method of statistical inference
null hypothesis, then you do not reject the null hypothesis; if the sample data are inconsistent with the null hypothesis, then you reject the null hypothesis
Statistical_hypothesis_test
Value indicating that a referenced dataset is invalid or doesn't exist
In computing, a null pointer (sometimes shortened to nullptr or null) or null reference is a value indicating that the pointer or reference does not refer
Null_pointer
Marker used in SQL databases to indicate a value does not exist
In the SQL database query language, null or NULL is a special marker used to indicate that a data value does not exist in the database. Introduced by the
Null_(SQL)
Unexpected outcome in experiments
In science, a null result is a result without the expected content: that is, the proposed result is absent. It is an experimental outcome which does not
Null_result
Measurable set whose measure is zero
In mathematical analysis, a null set in R {\displaystyle \mathbb {R} } is a Lebesgue measurable set of real numbers that has measure zero. This can be
Null_set
American talk radio host and author who advocates for alternative medicine
Gary Michael Null is an American talk radio host and author who advocates pseudoscientific alternative medicine and produces a line of questionable dietary
Gary_Null
Choosing not to use encryption
In modern cryptography, null encryption (or selecting null cipher or NONE cipher) is choosing not to use encryption in a system where various encryption
Null_encryption
Feature of some programming languages
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
Nullable_type
Sign representing zero or empty set
The null sign (∅) is a symbol often used in mathematics for denoting the empty set. The same letter in linguistics represents zero, the lack of an element
Null_sign
game theory, a null move or pass is a decision by a player to not make a move when it is that player's turn to move. Even though null moves are against
Null_move
American actor and comedian (born 1990)
Lucas Elliot Null (born July 7, 1990) is an American actor and comedian. He is best known as a cast member on the NBC sketch comedy series Saturday Night
Luke_Null
Online forum board
Nulled was an online cracking forum. In 2016, Nulled suffered a data breach, which helped law enforcement to obtain information about possible 'suspects'
Nulled
Binary operator in computer programming
The null coalescing operator is a binary operator that is part of the syntax for a basic conditional expression in several programming languages, such
Null_coalescing_operator
Object with no referenced value or with defined neutral ("null") behavior
computer programming, a null object is an object with no referenced value or with defined neutral (null) behavior. The null object design pattern, which
Null_object_pattern
Concept in mathematical physics
mathematical physics, a null dust solution (sometimes called a null fluid) is a Lorentzian manifold in which the Einstein tensor is null. Such a spacetime can
Null_dust_solution
Scientific Electronic Device
A nuller is an optical instrument, e.g., a beam combiner for nulling interferometry, used to block or cancel out a strong source so that fainter signals
Nuller
American Anglican theologian
John Ashley Null (born 1960 or 1961) is an American theologian and Anglican bishop. As an academic, he is best known for his research on the theology of
Ashley_Null
Morpheme with no phonetic form
In morphology, a null morpheme or zero morpheme is a morpheme that has no phonetic form. In simpler terms, a null morpheme is an "invisible" affix. It
Null_morpheme
Type of hypersurface
and in pseudo-Riemannian geometry, a null hypersurface is a hypersurface whose normal vector at every point is a null vector (has zero length with respect
Null_hypersurface
Data structure
computer programming, a null-terminated string is a character string stored as an array containing the characters and terminated with a null character (a character
Null-terminated_string
the stratosphere, null cycles and when the null cycles are broken are very important to the ozone layer. One of the most important null cycles takes place
Null_cycle
Function of the observed sample results
In null-hypothesis significance testing, the p-value is the probability of obtaining test results at least as extreme as the result actually observed,
P-value
Probability distribution of the test statistic under the null hypothesis
the null distribution is the probability distribution of the test statistic when the null hypothesis is true. For example, in an F-test, the null distribution
Null_distribution
Vector on which a quadratic form is zero
a vector space X with an associated quadratic form q, written (X, q), a null vector or isotropic vector is a non-zero element x of X for which q(x) =
Null_vector
Class of language where a sentence subject is not required
In linguistic typology, a null-subject language is a language whose grammar permits an independent clause to lack an explicit subject; such a clause is
Null-subject_language
Serial cable connecting two computers
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
Null_modem
In frame semantics, a theory of linguistic meaning, null instantiation is the name of a category used to annotate, or tag, absent semantic constituents
Null_instantiation
American singer-songwriter musician (born 1965)
two albums, Ghosts I–IV and The Slip, independently on his own label, The Null Corporation. In 2009, Nine Inch Nails went on hiatus following the Wave Goodbye
Trent_Reznor
1948 science-fiction novel by A. E. van Vogt
The World of Null-A, sometimes written The World of Ā, is a 1948 science fiction novel by Canadian-American writer A. E. van Vogt. It was originally published
The_World_of_Null-A
Order-zero graph or any edgeless graph
In the mathematical field of graph theory, the term "null graph" may refer either to the order-zero graph, or alternatively, to any edgeless graph (the
Null_graph
Type of subroutine in computer science
In computer science, a null function (or null operator) is a subroutine that leaves the program state unchanged. When it is part of the instruction set
Null_function
American singer
Unter Null (from German; Eng.: "Below Zero") is an American dark electro-industrial music act, founded in 1998 as a solo aggrotech project by Erica Dunham
Unter_Null
Instrument to measure minute voltage
A null detectors is an electrical measurement instrument used to measure minute voltages. High precision null detectors can resolve voltage differences
Null_detector
In radio electronics, a null is a direction in an antenna's radiation pattern where the antenna radiates almost no radio waves, so the far field signal
Null_(radio)
Boundary region of asymptotically flat spacetimes in general relativity
In theoretical physics, null infinity is a region at the boundary of asymptotically flat spacetimes. In general relativity, straight paths in spacetime
Null_infinity
Japanese musician
Kazuyuki; born September 13, 1961 in Tokyo), known by his stage name KK Null, is a Japanese experimental multi-instrumentalist active since the early
KK_Null
Study of collection and analysis of data
an alternative to an idealized null hypothesis of no relationship between two data sets. Rejecting or disproving the null hypothesis is done using statistical
Statistics
Infinite cardinal number
ℵ 0 {\displaystyle \aleph _{0}} (read aleph-nought, aleph-zero, or aleph-null); the next larger cardinality of a well-ordered set is ℵ 1 , {\displaystyle
Aleph_number
Boolean operator
call operator, null-conditional operator, null-propagation operator) is a binary operator that returns null if its first argument is null; otherwise it
Safe_navigation_operator
American film critic (born 1971)
Christopher Null (born September 7, 1971) is an American writer, journalist and entrepreneur. A former blogger for Yahoo! Tech, he was the editor of Drinkhacker
Christopher_Null
Simple form of encryption
A null cipher, also known as concealment cipher, is an ancient form of encryption where the plaintext is mixed with a large amount of non-cipher material
Null_cipher
2024 video game
created the universe over the void to seal away Null, causing it to resent them. After Hyrule was founded, Null attempted to break its seal by creating rifts
The Legend of Zelda: Echoes of Wisdom
The_Legend_of_Zelda:_Echoes_of_Wisdom
Optical component
A null corrector is an optical device used in the testing of large aspheric mirrors. A spherical mirror of any size can be tested relatively easily using
Null_corrector
Concepts from statistical hypothesis testing
of a true null hypothesis in statistical hypothesis testing. A type II error, or a false negative, is the incorrect acceptance of a false null hypothesis
Type_I_and_type_II_errors
Nonfunctional allele caused by a genetic mutation
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
Null_allele
Japanese rock band
Absolut Null Punkt (often abbreviated to ANP) is a Japanese rock band formed by KK Null and Seijiro Murayama in 1984. ANP's music incorporates elements
Absolut_Null_Punkt
Unit of speech sounds
special zero consonant to represent a null onset. As an example, in Hangul, the alphabet of the Korean language, a null onset is represented with ㅇ at the
Syllable
A null session is an anonymous connection to an inter-process communication network service on Windows-based computers. The service is designed to allow
Null_session
Statistical method for handling multiple comparisons
discovery rate (FDR) is a method of conceptualizing the rate of type I errors in null hypothesis testing when conducting multiple comparisons. FDR-controlling
False_discovery_rate
The Null Stern Hotel is a former nuclear bunker converted into a hotel, now a museum. A prototype opened in Teufen, Appenzell Ausserrhoden, Switzerland
Null_Stern_Hotel
Statistical test comparing two probability distributions
distribution functions of two samples. The null distribution of this statistic is calculated under the null hypothesis that the sample is drawn from the
Kolmogorov–Smirnov_test
In mathematics, a null semigroup (also called a zero semigroup) is a semigroup with an absorbing element, called zero, in which the product of any two
Null_semigroup
In computer chess programs, the null-move heuristic is a heuristic technique used to enhance the speed of the alpha–beta pruning algorithm. Alpha–beta
Null-move_heuristic
German metal band
Null Positiv is a German metal band that was founded in Lübbenau in 2015. The band uses elements of nu metal and the Neue Deutsche Härte. Null Positiv
Null_Positiv
American football player (born 1985)
Keith Aaron Null (born September 24, 1985) is an American former professional football player who was a quarterback in the National Football League (NFL)
Keith_Null
Concept used in black hole solutions
trapped null surface is often used interchangeably. However, when discussing causal horizons, trapped null surfaces are defined as only null vector fields
Trapped_surface
Feature of object-oriented programming
safety (also known as null safety) is a guarantee within an object-oriented programming language that no object references will have null or void values. In
Void_safety
Book by A.E. van Vogt
Null-A Three, usually written Ā Three, is a 1985 science fiction novel by Canadian-American writer A. E. van Vogt. It incorporates concepts from the General
Null-A_Three
Misinterpretation of statistical significance
two results: either the null hypothesis is rejected (which however does not prove that the null hypothesis is false), or the null hypothesis cannot be rejected
Misuse_of_p-values
Indian nonprofit organization
Null, or n|u, is a registered not-for-profit society and the largest active security community in India with over 8 chapters in major cities - Bangalore
Null_Community
Computer fault caused by access to restricted memory
error in programs written in languages that support pointers that can be null, or that can be set to an arbitrary value, or that support arrays, and in
Segmentation_fault
Mathematical model combining space and time
moving at the speed of light is zero. Such an interval is termed lightlike or null. A photon arriving in our eye from a distant star will not have aged, despite
Spacetime
Animated character in "The Site" television series
Dev Null was an animated virtual reality character created in 1996 by Leo Laporte for MSNBC's computer and technology TV series The Site. Espresso barista
Dev_Null
In physics, a null is a point in a field where the field quantity is zero as the result of two or more opposing quantities completely cancelling each other
Null_(physics)
German Television Game show
Null gewinnt (literally, "Zero wins") is the German adaptation of the BBC game show Pointless. Hosted by Dieter Nuhr and Ralph Caspers, it aired on Das
Null_gewinnt
Japanese multimedia franchise
Null & Peta (Japanese: ぬるぺた) is a Japanese multimedia franchise created by Hato. It consisted of an anime television series produced by Shin-Ei Animation
Null_&_Peta
American writer (born 1980s)
Matthew Neill Null is an American writer, the author of the novel Honey from the Lion and the short story collection Allegheny Front. His fiction has received
Matthew_Neill_Null
Unique string of length zero
formal language theory, the empty string, also known as the empty word or null string, is the unique string of length zero. Formally, a string is a finite
Empty_string
Statistical hypothesis test
test is valid when the test statistic is chi-squared distributed under the null hypothesis, specifically Pearson's chi-squared test and variants thereof
Chi-squared_test
SQL clause
above tables: CREATE TABLE department( DepartmentID INT PRIMARY KEY NOT NULL, DepartmentName VARCHAR(20) ); CREATE TABLE employee ( LastName VARCHAR(20)
Join_(SQL)
Vectors mapped to 0 by a linear map
In mathematics, the kernel of a linear map, also known as the null space or nullspace, is the part of the domain which is mapped to the zero vector of
Kernel_(linear_algebra)
Machine instruction that indicates to a computer to do nothing
NOP or null statement if it has no effect. Null statements may be required by the syntax of some languages in certain contexts. In Ada, the null statement
NOP_(code)
German term for midnight on 8 May 1945 in Germany
Zero hour (German: Stunde Null, pronounced [ˈʃtʊndə nʊl]) is a term which is used in reference to the capitulation of Germany at midnight on 8 May 1945
Zero_hour_(1945)
Absence in linguistics
In linguistics, a zero or null is a segment that is not pronounced or written. It is a useful concept in analysis, usually written with the symbol "∅"
Zero_(linguistics)
General-purpose programming language
Library. Type inference allows for more concise syntax than Java, while null-safety features reduce a common class of runtime errors. Kotlin mainly targets
Kotlin
Concept in inferential statistics
\alpha } , is the probability of the study rejecting the null hypothesis, given that the null hypothesis is true; and the p-value of a result, p {\displaystyle
Statistical_significance
Broadest definition of sizes in integer-dimensional spaces
sets of measure zero, and all sets that differ from a Borel set by such a null set. Equivalently, a set E ⊆ R n {\displaystyle E\subseteq \mathbb {R} ^{n}}
Lebesgue_measure
Language in which certain pronouns may sometimes be omitted
"pronoun-dropping" is part of the larger topic of zero or null anaphora. The connection between pro-drop languages and null anaphora relates to the fact that a dropped
Pro-drop_language
1956 novel by A.E. van Vogt
The Pawns of Null-A is a 1956 science fiction novel by American-Canadian writer A. E. van Vogt, originally published as a four-part serial in Astounding
The_Pawns_of_Null-A
Statistical test for normality of data
Kolmogorov–Smirnov test. It is used to test the null hypothesis that data come from a normally distributed population, when the null hypothesis does not specify which
Lilliefors_test
Topics referred to by the same term
Null ideal may refer to: The ideal of null sets in measure theory An ideal that is a pseudo-ring of square zero in ring theory This disambiguation page
Null_ideal
Part of a network quietly losing traffic
Alternatively, a null route can be implemented by forwarding packets to an illegal IP address such as 0.0.0.0, or the loopback address. Null routing has an
Black_hole_(networking)
Type that allows only one value
return null (in fact, typeof(null) is void): typeof(null) returnThatSpecialThing() { return null; } void writeTypeOfNull() { writeln(typeof(null)); //
Unit_type
Flat-sided three-dimensional shape
In geometry, a polyhedron (pl.: polyhedra or polyhedrons; from Greek πολύ (poly-) 'many' and ἕδρον (-hedron) 'base, seat') is a three-dimensional figure
Polyhedron
mathematics, for example in the study of statistical properties of graphs, a null model is a type of random object that matches one specific object in some
Null_model
Statistical hypothesis test
p} -value by comparing T {\displaystyle T} to its distribution under the null hypothesis. The ranks are defined so that R i {\displaystyle R_{i}} is the
Wilcoxon_signed-rank_test
Causal relationships between points in a manifold
{\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
Causal_structure
In-band data value that must be handled specially by computer code
may make more sense to return a null pointer or null value, or when working with option types, return the none/null option. Some examples of common sentinel
Sentinel_value
Technique used in radio antenna systems
Null fill in radio engineering is used in radio antenna systems which are located on mountains or tall towers, to prevent too much of the signal from overshooting
Null_fill
2014 video game
Im Null (stylized Im null) is a 2014 video game by Austin-based independent developer Zak Ayles. Described as a "virtual horror art gallery", Im null is
Im_Null
Key results in general relativity on gravitational singularities
solutions of the Einstein field equations. Null singularities: These singularities occur on light-like or null surfaces. An example might be found in certain
Penrose–Hawking singularity theorems
Penrose–Hawking_singularity_theorems
Lymphocytes without surface receptors
Null cells, a subset of large circulating white blood cells, mimic the appearance of T or B lymphocytes but do not possess their defining surface receptors
Null_cell
1995 EP by Foetus
Null is a Foetus EP released in 1995 by Big Cat in the UK. Null acts as a De facto single for "Verklemmt," released on Gash. Promotional copies of Null
Null_(Foetus_EP)
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