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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
Position that there is no relationship between two phenomena
The null hypothesis (often denoted H 0 {\textstyle H_{0}} ) is the claim in scientific research that the effect being studied does not exist. The null hypothesis
Null_hypothesis
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)
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
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
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
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
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
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)
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
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
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
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
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
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
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
Measurable set whose measure is zero
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
Null_set
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
Method of statistical inference
hypotheses: a default "null" hypothesis (denoted H0) and its negation, the "alternative" hypothesis (H1). Typically the test will select a null hypothesis that
Statistical_hypothesis_test
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
American singer
Unter Null, was founded as a solo aggrotech music project by Erica Dunham in 1998 at the age of 17, while living in Seattle, United States. As of 2012[update]
Unter_Null
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)
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
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
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
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
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)
Unit of organization for a sequence 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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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)
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
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
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)
General-purpose programming language
between nullable and non-nullable data types. All nullable objects must be declared with a "?" postfix after the type name. Operations on nullable objects
Kotlin
A nullor is a theoretical two-port network consisting of a nullator at its input and a norator at its output. Nullors represent an ideal amplifier, having
Nullor
American animation media franchise
Vreedle Brothers are "summons" in the game. Additionally, Bellwood and the Null Void are included as battle arenas. Kevin also appears as a "summon" in the
Ben_10
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
British occultist and writer (1953–2026)
Carroll first issued Liber Null in 1978 and Psychonaut in 1982. They were published together in the 1987 book Liber Null & Psychonaut, which is considered
Peter_J._Carroll
Lowest possible energy of a quantum system or field
Zero-point energy (ZPE) is the lowest possible energy that a quantum mechanical system may have. Unlike in classical mechanics, quantum systems constantly
Zero-point_energy
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)
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
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
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
Linguistics concept
classical model such as the distinction of null subjects and null objects. In the classical theory model, empty (or null) DPs can be broken down into four main
Empty_category
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
Observed inability to reproduce scientific studies
are presented here. In the most common case, null hypothesis testing, there are two hypotheses, a null hypothesis H 0 {\displaystyle H_{0}} and an alternative
Replication_crisis
SQL clause
above tables: CREATE TABLE department( DepartmentID INT PRIMARY KEY NOT NULL, DepartmentName VARCHAR(20) ); CREATE TABLE employee ( LastName VARCHAR(20)
Join_(SQL)
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)
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
Absence of legal effect
that contract is treated as being void ab initio. The frequent combination "null and void" is a legal doublet. The term is frequently used in contradistinction
Void_(law)
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)
Human blood group system involving 49 blood antigens
Hasekura H, Boettcher B (1970). "Family study of the original Australian Rh-null". Proceedings of the Japan Academy. 46 (7): 733–737 – via J-STAGE. Bailey
Rh_blood_group_system
Types of error in data reporting
result corresponds to rejecting the null hypothesis, and a negative result corresponds to not rejecting the null hypothesis. The terms are often used
False positives and false negatives
False_positives_and_false_negatives
Alternative assumption to the null hypothesis
the null hypothesis. The test of significance is designed to assess the strength of the evidence against the null hypothesis. Usually, the null hypothesis
Alternative_hypothesis
Chance of wrongly rejecting the null hypothesis
fall-out or false alarm rate ) is the probability of falsely rejecting the null hypothesis for a particular test. The false positive rate is calculated as
False_positive_rate
Allomorph that is a null morpheme
morpheme-based morphology, the term null allomorph or zero allomorph is sometimes used to refer to some kind of null morpheme for which there are also contexts
Null_allomorph
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
Legal procedure for declaring a marriage null and void
procedure within secular and religious legal systems for declaring a marriage null and void. Unlike divorce, it is usually retroactive, meaning that an annulled
Annulment
NULL
NULL
NULL
NULL
Girl/Female
Hindu, Indian
Name of a Goddess
Boy/Male
American, Anglo, Australian, British, English, French, German
Keeper of the Garden; Occupational Name; Gardener; Surname
Girl/Female
Arabic, Hindu, Indian, Kannada, Muslim
Victorious; Successful
Male
Hungarian
Hungarian form of Greek Bartholomaios, BERTALAN means "son of Talmai."
Boy/Male
Hindu, Indian
Smile
Girl/Female
Muslim
Brightness
Boy/Male
Tamil
Sight
Boy/Male
Christian, Hindu, Indian, Tamil
Soul; Life
Biblical
flames; inflamed; swords
Boy/Male
Muslim/Islamic
Intercessor
NULL
NULL
NULL
NULL
NULL
n.
Confirmation or ratification (as of something otherwise null and void), by a court or a grantor.
n.
One who nullifies or makes void; one who maintains the right to nullify a contract by one of the parties.
a.
Not voidable; incapable of being made null or void.
p. pr. & vb. n.
of Nullify
n.
A name for certain crustaceous marine algae which secrete carbonate of lime on their surface, and were formerly thought to be of animal nature. They are now considered corallines of the genera Melobesia and Lithothamnion.
n.
Nonexistence; as, a decree of nullity of marriage is a decree that no legal marriage exists.
n.
An unbeliever.
n.
One who maintains that faith alone, without works, is sufficient for justification; -- opposed to nullifidian.
n.
The act of nullifying; a rendering void and of no effect, or of no legal effect.
a.
Of no legal force or effect, incapable of confirmation or ratification; null. Cf. Voidable, 2.
n.
That which is null.
n.
The quality or state of being void; /mptiness; vacuity; nullity; want of substantiality.
pl.
of Nullity
a.
To render void; to make to be of no validity or effect; to vacate; to annul; to nullify.
n.
One of the beads in nulled work.
n.
The quality or state of being null; nothingness; want of efficacy or force.
a.
Turned so as to resemble nulls.
a.
Reversed or nullified by decree, as something previously decreed.
imp. & p. p.
of Nullify
a.
To make void; to render invalid; to deprive of legal force or efficacy.