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Typeface style used in mathematics
Blackboard bold is a style of writing bold symbols on a blackboard by doubling certain strokes, commonly used in mathematical lectures, and the derived
Blackboard_bold
Reusable writing surface
weights using a blackboard, Guinea-Bissau, 1974 An advertising blackboard in Taipei, Taiwan, 2019 Education portal Blackboard bold Blackboard Jungle Chalkboard
Blackboard
{\mathfrak {b}}} , B {\displaystyle {\mathfrak {B}}} , ..., and blackboard bold N {\displaystyle \mathbb {N} } , Z {\displaystyle \mathbb {Z}
Glossary of mathematical symbols
Glossary_of_mathematical_symbols
Topics referred to by the same term
opposing collectivisation Blackboard bold, a style of typeface often used for certain symbols in mathematics and physics texts Blackboard Inc., an e-learning
Blackboard_(disambiguation)
naturals", the natural numbers are usually symbolised by a boldface N (or blackboard bold N {\displaystyle \mathbb {\mathbb {N} } } , Unicode U+2115 ℕ DOUBLE-STRUCK
List_of_numbers
Number representing a continuous quantity
numbers, sometimes called "the reals", is usually notated as a bold R or the blackboard bold R {\displaystyle \mathbb {R} } . The adjective real, used
Real_number
Number in {..., –2, –1, 0, 1, 2, ...}
integers. The set of all integers is often denoted by the boldface Z or blackboard bold Z {\displaystyle \mathbb {Z} } . The set of natural numbers N
Integer
Number used for counting
used. The set of the natural numbers is commonly denoted by a bold N or a blackboard bold N {\displaystyle \mathbb {N} } . The natural numbers are used
Natural_number
Quotient of two integers
field of rational numbers. It is usually denoted by boldface Q, or blackboard bold Q . {\displaystyle \mathbb {Q} .} A rational number is a real number
Rational_number
Eighth letter of the Latin alphabet
constant ℏ : reduced Planck constant H {\displaystyle \mathbb {H} } : Blackboard bold capital H used in quaternion notation 1 Also for encodings based on
H
Informal set theories
r and s are real numbers. Natural numbers are used for counting. A blackboard bold capital N ( N {\displaystyle \mathbb {N} } ) often represents this
Naive_set_theory
{\displaystyle \mathbb {N} } Blackboard bold capital N (for natural numbers set) 1895 Giuseppe Peano Q {\displaystyle \mathbb {Q} } Blackboard bold capital Q (for rational
Table of mathematical symbols by introduction date
Table_of_mathematical_symbols_by_introduction_date
Hypercomplex number system
are usually represented by the capital letter O, using boldface O or blackboard bold O {\displaystyle \mathbb {O} } . Octonions have eight dimensions; twice
Octonion
Symbols for constants, special functions
Vectors can be denoted in boldface. Sets of numbers are typically bold or blackboard bold. The Greek letter forms used in mathematics are often different
Greek letters used in mathematics, science, and engineering
Greek_letters_used_in_mathematics,_science,_and_engineering
Third letter of the Latin alphabet
(currency) ₠ : European Currency Unit CE C {\displaystyle \mathbb {C} } : blackboard bold C, denoting the complex numbers ℭ : blackletter C Ꜿ ꜿ : Medieval abbreviation
C
Hypercomplex number system
numbers, usually represented by the capital letter S, boldface S or blackboard bold S {\displaystyle \mathbb {S} } . The sedenions are obtained by applying
Sedenion
Average value of a random variable
as E (upright), E (italic), or E {\displaystyle \mathbb {E} } (in blackboard bold), while a variety of bracket notations (such as E(X), E[X], and EX)
Expected_value
Topics referred to by the same term
positional numeral systems with a radix of 11 or greater Sometimes in blackboard bold represents the algebraic numbers ( A {\displaystyle \mathbb {A} } )
A_(disambiguation)
Letter case Small caps Snake case Title case Visual distinction Blackboard bold Bold Color printing Italics Oblique Underline Whitespace Horizontal aspects
History_of_the_Latin_script
Typeface for TeX
version: Bold italics of Greek characters Bold and heavy styles of basic math symbols AMS symbols, including bold and heavy styles Script, blackboard bold, and
MathTime
Uppercase or lowercase
of other typefaces, such as boldface, fraktur, script typeface, and blackboard bold. Some letters of the Arabic and Hebrew alphabets and some jamo of the
Letter_case
Font designed to aid retention of the content written using it
Letter case Small caps Snake case Title case Visual distinction Blackboard bold Bold Color printing Italics Oblique Underline Whitespace Horizontal aspects
Sans_forgetica
symbols and Greek) Apple Symbols (Included with macOS) Asana-Math Blackboard bold Bookshelf Symbol 7 Cambria Math Computer Modern Lucida Math* Marlett
List_of_typefaces
Number with a real and an imaginary part
complex numbers is denoted by C {\displaystyle \mathbb {C} } (blackboard bold) or C (upright bold). In some disciplines such as electromagnetism and electrical
Complex_number
American actor (1929–1982)
attention for the role of juvenile delinquent Artie West in his debut film Blackboard Jungle (1955). He later came to prominence as one of the leads of the
Vic_Morrow
Number divisible only by 1 and itself
{P} } (a boldface capital P) or by P {\displaystyle \mathbb {P} } (a blackboard bold capital P). From around 1550 BC, the Rhind Mathematical Papyrus has
Prime_number
Mathematical notation
now-standard square brackets [ · ] , and the original parentheses ( · ) , blackboard bold brackets have also been used, e.g. ⟦ · ⟧ , as well as other unusual
Iverson_bracket
Method for producing composition algebras
32-dimensional algebra over the real numbers and can be represented by blackboard bold T {\displaystyle \mathbb {T} } . The Cayley–Dickson construction can
Cayley–Dickson_construction
Topics referred to by the same term
S {\displaystyle \mathbb {S} } is the blackboard bold letter S. It can refer to: The n-dimensional sphere S n {\displaystyle \mathbb {S} ^{n}} The sphere
𝕊
Multilingual font family from Google
symbols and arrow symbols. Among mathematical symbols, it includes blackboard bold glyphs, a mathematical sans-serif font modeled on Helvetica, Fraktur
Noto_fonts
Topics referred to by the same term
positive divisors of an integer n D {\displaystyle \mathbb {D} } in blackboard bold, the unit disk in the complex plane, or the decimal fractions; see
D_(disambiguation)
Mathematics taught in primary and secondary school
set of all rational numbers is usually denoted by a boldface Q (or blackboard bold Q {\displaystyle \mathbb {Q} } ). A pattern is a discernible regularity
Elementary_mathematics
Italian printing press manufacturer and former type foundry
Letter case Small caps Snake case Title case Visual distinction Blackboard bold Bold Color printing Italics Oblique Underline Whitespace Horizontal aspects
Nebiolo_Printech
social media-related logo owned by Meta Platforms. The X logo uses a blackboard bold X, a character that has appeared in mathematical textbooks since the
Twitter_under_Elon_Musk
Vectors can be denoted in boldface. Sets of numbers are typically bold or blackboard bold. A represents: the first point of a triangle the digit "ten" in
Latin letters used in mathematics, science, and engineering
Latin_letters_used_in_mathematics,_science,_and_engineering
Irish mathematician and physicist (1805–1865)
theory. The algebra of quaternions is usually denoted by H, or in blackboard bold by H {\displaystyle \mathbb {H} } , in honour of Hamilton. The Hamilton
William_Rowan_Hamilton
Topics referred to by the same term
branch of topology and algebra K {\displaystyle \mathbb {K} } , in blackboard bold, is a commonly used symbol for a field, as an abbreviation of the German
K_(disambiguation)
Technique of printing two characters atop one another
[citation needed] Overstriking with an offset was also used to created "Blackboard bold" style characters used in mathematics. The character set for the APL
Overstrike
Tiling puzzle
University of Toronto. Cambridge, University Press. Steckles, Katie. Blackboard Bold: MacMahon Squares. Retrieved 10 March 2021. Guy. Cube Root of 31. Wang
Edge-matching_puzzle
Topics referred to by the same term
itself on a typewriter as a way to make it darker (or by accident). Blackboard bold, whose characters are sometimes called double-struck, a typeface style
Double_strike
Series of instructional/reference books
figure known as the "Dummies Man", and an informal, blackboard-style logo. Prose is simple and direct. Bold icons—such as a piece of string tied around an
For_Dummies
Topics referred to by the same term
B {\displaystyle \mathbb {B} } is the blackboard bold letter B. It can refer to: The n-dimensional ball B n {\displaystyle \mathbb {B} ^{n}} A Boolean
𝔹
Style for gender-neutral written German
Letter case Small caps Snake case Title case Visual distinction Blackboard bold Bold Color printing Italics Oblique Underline Whitespace Horizontal aspects
Binnen-I
Prey Birdz Bizaardvark B. J. and the Bear Black and Blue (UK) Blackadder Blackboard Wars Black-ish Black Lightning The Blacklist The Blacklist: Redemption
List of television programs: B
List_of_television_programs:_B
Writing implement
concrete sidewalks, frequently four square courts or hopscotch boards. Blackboard chalk, typically used in educational settings, is shorter and thinner
Sidewalk_chalk
Children's book by Julia Donaldson and Axel Scheffler
school in the bay, and writes "Save The Whale!" in her slimy trail on the blackboard. The school's children and teacher immediately fetch the emergency services
The_Snail_and_the_Whale
Prime Minister of the United Kingdom from 1979 to 1990
Conservative Party leader, compared her voice of 1973 to "a cat sliding down a blackboard". Thatcher had already begun to work on her presentation on the advice
Margaret_Thatcher
1955 28th 1 1 Speedy Gonzales 1955 28th 1 1 Survival City 1955 28th 1 1 Blackboard Jungle 1955 28th 0 4 Guys and Dolls 1955 28th 0 4 Bad Day at Black Rock
List of Academy Award–nominated films
List_of_Academy_Award–nominated_films
Grammatical phenomenon in Austronesian
boy king OBL pisara. blackboard S‹um›ulat ya=ng poesia ing lalaki king pisara. ‹AV›will.write 3SG.DIR=ACC poem DIR boy OBL blackboard "The boy will write
Symmetrical_voice
Airline alliance
Retrieved 8 October 2015. "Star Alliance soon to welcome Egypt Air". eTravel Blackboard. 13 June 2008. Archived from the original on 10 July 2011. Retrieved 22
Star_Alliance
respectively, which are highlighted in bold. Moldovan stamp depicting a Romanian language class and teacher. The blackboard features a quatrain from "Limba noastră"
National_anthem_of_Moldova
Association football match
French magazine Le Point, Jean-Pierre de Mondenard said Marseille had a blackboard in their team locker room that read "injections for everyone". Tapie only
1993 UEFA Champions League final
1993_UEFA_Champions_League_final
1943 painting by Norman Rockwell
has been praised for its visual focus. The solid dark background of the blackboard makes the subject stand out. The empty bench seat in front of the speaker
Freedom_of_Speech_(painting)
1998 television anime series
school student with few friends or interests. She later grows multiple bolder personalities, both in the physical world and the Wired, and starts making
Serial_Experiments_Lain
1955 Paddy Chayefsky Marty The teleplay by Chayefsky Won Richard Brooks Blackboard Jungle The novel by Evan Hunter Nominated Daniel Fuchs Love Me or Leave
List of Jewish Academy Award winners and nominees
List_of_Jewish_Academy_Award_winners_and_nominees
National anthem of Turkey and Northern Cyprus
version of the national anthem typically occupies the wall above the blackboard in the classrooms of Turkish schools, accompanied by a Turkish flag, a
İstiklal_Marşı
American drone and data company, 2010–2023
software, Michael Chasen, a cofounder and former CEO of education tech giant Blackboard Inc. In January 2018 PreicisionHawk announced that the company raised
PrecisionHawk
Australian television soap opera (1985–2025)
April 2026. "Neighbours become good Friends with Pacific Jewel". Travel Blackboard. 29 September 2010. Archived from the original on 10 July 2011. Retrieved
Neighbours
Slovak football club
lesson" to children wearing DAC and Ferencvárosi TC kits, accompanied by a blackboard and inscriptions mocking Hungary and asserting Slovak dominance. Anti-Hungarian
FC_DAC_1904_Dunajská_Streda
American reality television show aired in 2013
given 30 minutes to solve an engineering problem using only an electronic blackboard. The 2 contestants with the best solutions are chosen by the judges to
The_Big_Brain_Theory
Episodes aired 2025
bighorn sheep centerpiece. Kitchen: Vibrant with parrot installations and bold colors. Dining area: Features oversized animal sculptures like a bear face
Bigg Boss (Hindi TV series) season 19
Bigg_Boss_(Hindi_TV_series)_season_19
Prime number of the form 2^n – 1
talk by Frank Nelson Cole in 1903. Without speaking a word, he went to a blackboard and raised 2 to the 67th power, then subtracted one, resulting in the
Mersenne_prime
Japanese animation
Early anime works were experimental, and consisted of images drawn on blackboards, stop motion animation of paper cutouts, and silhouette animation. Cel
Anime
(1999) The album's cover depicts a naked obese woman seated in front of a blackboard where the words "I will be god" are written numerous times. The album
List of controversial album art
List_of_controversial_album_art
Capital city of Queensland, Australia
visitor numbers skyrocket". Brisbane Marketing Convention Bureau. e-Travel Blackboard. 3 January 2008. Archived from the original on 20 January 2011. Retrieved
Brisbane
Comics character
desert, but when he finally manages to enter the bunker, he finds only a blackboard, a globe, and some pieces of paper filled with writings about the future
Rip_Hunter
Indian jurist, economist, politician and social reformer (1891–1956)
Buddha is incorrect in Marxism. However, it seems that Ambedkar made these bold claims without reading a single Marxist text. He also claims that a 60 year
B._R._Ambedkar
National airline of Vietnam
October 2010). "Vietnam Airlines offers world class service". e-Travel Blackboard. Archived from the original on 8 March 2012. Chi, Nguyen (December 2001)
Vietnam_Airlines
Austrian esotericist (1861–1925)
Steiner's Blackboard Drawings: An Aesthetic Perspective Archived 29 November 2005 at the Wayback Machine exhibition of Rudolf Steiner's Blackboard Drawings
Rudolf_Steiner
Australian rock singer (born 1947)
performance was "a teeth-gnashing, eyeballs-bleeding, nails-scratching-down-a-blackboard rendition" and rates it as the worst pre-game display in Australian sporting
Angry_Anderson
Computer program for working with tabular data
watching his university professor create a table of calculation results on a blackboard. When the professor found an error, he had to tediously erase and rewrite
Spreadsheet
State of Australia
visitor numbers skyrocket". Brisbane Marketing Convention Bureau. e-Travel Blackboard. 3 January 2008. Archived from the original on 20 January 2011. Retrieved
Queensland
American painter (1882–1925)
elementary–school teachers often asked him to decorate their classroom blackboards at Thanksgiving and Christmas. At age 10, George took to athletics, and
George_Bellows
German artist and art theorist (1921–1986)
During the performance he also used wax earplugs and drew and wrote on a blackboard. The piece is subtitled "The greatest composer here is the thalidomide
Joseph_Beuys
American landscape painter (1836–1910)
his financial condition considerably. They varied from highly detailed (Blackboard – 1877) to broadly impressionistic (Schooner at Sunset – 1880). Some watercolors
Winslow_Homer
36th season of the reality television series
and search for a key, which unlocks team's handcuffs. Task 5: Scratch a blackboard to reveal a clue: "The key to your freedom lies underneath". Task 6: Dig
The_Challenge:_Double_Agents
Winners of satirical science award
Lloyd's of London, heirs to 300 years of dull prudent management, for their bold attempt to ensure disaster by refusing to pay for their company's losses
List of Ig Nobel Prize winners
List_of_Ig_Nobel_Prize_winners
2011 British film
deliberation, boldly writes "4." The teacher is visibly disappointed, and sudden gunfire is heard as blood splatters across the blackboard and the boy's
Two_&_Two_(2011_film)
Word class or 'part of speech'
possession of me" [I have]) Khmer: លើក្តារខៀន [ləː kdaːkʰiən] ("on (the) blackboard") Tigrinya: አብ ልዕሊ ጣውላ [abː lɨʕli tʼawla] ("at/on top table"); አብ ትሕቲ
Adposition
Youth music NGO
Being one of the most popular activities within YAM, the main aim of the Blackboard Music Project (BbMP) is to increase the quantity as well as the quality
Jeunesses Musicales International
Jeunesses_Musicales_International
Website for online discussions
2017. Coopman, Stephanie J. (17 May 2009). "A critical examination of Blackboard's e-learning environment". First Monday. 14 (6). doi:10.5210/fm.v14i6.2434
Internet_forum
eligibility expanded to include the writers of feature films. Winners in bold. Although the prize is awarded only to writers, this list includes only the
List of Humanitas Prize recipients
List_of_Humanitas_Prize_recipients
American animation studio
serviced the remaining demand with reissues of his older cartoons. Bye Bye Blackboard, a Woody Woodpecker cartoon, was part of the final slate of cartoons made
Walter_Lantz_Productions
American painter, film critic and writer
sometimes running them backwards or adding in slides and sketches on the blackboard to illustrate his ideas. His exams had a reputation for being demanding
Manny_Farber
2018 & 2019) Blackbirds: (1915 & 1920) Blackbirds at Bangpleng (1994) Blackboard Jungle (1955) Blackenstein (1973) Blackfish (2013) Blackhat (2015) BlacKkKlansman
List_of_films:_B
Fictional superhero in DC Comics
asks Ryan if he wrote down various equations to update the bio-belt on a blackboard. Impressed, Lobo decides that Batman should recruit Ryan, despite Batman
Atom_(Ryan_Choi)
Public declaration of the intentions, motives, or views of an artist or artistic movement
Collection. Retrieved April 12, 2023. Swift, Howard (1952). "Dali Uses Blackboard to Explain New Nuclear Mysticism in Art". The Dalí Museum Library & Archival
Art_manifesto
Art produced in preliterate cultures
to the lines. The lines themselves are laid out on a sort of natural blackboard, where a thin layer of dark stone covers lighter stone; the lines were
Prehistoric_art
American cartoonist and animator (c.1866–1934)
McCay's use of color. McCay learned how to draw quickly using drills on a blackboard, and gained an appreciation for master artists of the past. McCay spent
Winsor_McCay
2008 single by Kanye West
before the drawings transport themselves across the classroom to the blackboard. A tale of a heart being broken is told, with a bleeding heart being present
Heartless_(Kanye_West_song)
Business models that can be compatible with open source software projects
Moodle. 2016. Retrieved 18 June 2016. Kolowich, Steve (27 March 2012). "Blackboard's Open-Source Pivot". Inside Higher Ed. Retrieved 18 June 2016. Montague
Business models for open-source software
Business_models_for_open-source_software
to change magically. In Humorous Phases of Funny Faces (1906) he had blackboard drawings go through series of changes and used animated cutout drawings
Animation in the United States during the silent era
Animation_in_the_United_States_during_the_silent_era
South Korean television program
Boom: Boom would write two words of the lyrics (that are requested) on a blackboard eraser, and flip it around in front of the cast members and guests, for
DoReMi_Market
Modifier mark added to a letter
accent is used to add emphasis in the same way as underlining or writing in bold or italics in English, for example Dit is jóú boek (It is your book). The
Diacritic
List of notable people from Illinois
of Illinois 2000–20 Richard Kiley, Emmy and Tony Award-winning actor, Blackboard Jungle, A Year in the Life, Man of La Mancha, The Phenix City Story Dorothy
List_of_people_from_Illinois
2008 American propaganda film
Expelled is inscribed in chalk by Stein in repetitive lines on a classroom blackboard: 'Do not question Darwinism.' Anyone who thinks that scientists do not
Expelled: No Intelligence Allowed
Expelled:_No_Intelligence_Allowed
original on March 5, 2016. Retrieved January 30, 2016. "Murder on the Blackboard: Detail View". American Film Institute. Archived from the original on
List_of_RKO_Pictures_films
Grand final of the 1982 Victorian Football League season
routine. In the Carlton rooms, David Parkin wrote a few key points on the blackboard and made a simple promise to his players that they would win if every
1982_VFL_grand_final
Public university in Norman, Oklahoma, US
Frederick Elder said, "What do you need to keep classes going? Two yards of blackboard and a box of chalk." As a response to the fire, English professor Vernon
University_of_Oklahoma
Conditionals that discuss what would have been if things were otherwise
counterfactual conditional, e.g., "If there had been a circle on the blackboard then there would have been a triangle", and the subsequent information
Counterfactual_conditional
BLACKBOARD BOLD
BLACKBOARD BOLD
Girl/Female
French Latin American Arabic Celtic
Blackbird.
Boy/Male
German
Blackbird
Girl/Female
French Latin American
Blackbird.
Girl/Female
French
Blackbird.
Girl/Female
French
Blackbird.
Girl/Female
Latin
Blackbird.
Girl/Female
Latin
Blackbird.
Surname or Lastname
English, Scottish, and northern Irish
English, Scottish, and northern Irish : of uncertain etymology: perhaps a derivative of the nickname black heart, or from blackguard, a Tudor term denoting a group of the lowest-class menials in a household.Perhaps also an altered spelling of German Blackert.
Surname or Lastname
English
English : habitational name from any of various places called Blackford, for example in Somerset, from Old English blæc ‘black’, ‘dark’ + ford ‘ford’.
Girl/Female
Latin
Blackbird.
Boy/Male
Native American
Blackbird.
Girl/Female
French
Blackbird.
Girl/Female
Latin
Blackbird.
Surname or Lastname
English
English : variant of Blackburn.
Girl/Female
Latin
Blackbird.
Girl/Female
French
Blackbird.
Girl/Female
Australian, French
Blackbird
Girl/Female
American, German
Blackbird
Girl/Female
French
Blackbird.
Girl/Female
Latin
Blackbird.
BLACKBOARD BOLD
BLACKBOARD BOLD
Boy/Male
Biblical
An oak, a curse, perjury.
Girl/Female
Dutch, German
Hale; Wide
Girl/Female
Australian, Christian, French, Latin
Refuge; Nest
Female
African
adversity.
Boy/Male
American, Australian, British, Chinese, Christian, Danish, English, French, German, Jamaican
Cliff; Slope; Bank; Someone who Lived Near a Cliff or a Riverbank; Form of Clifford; From a Steep Cliff
Girl/Female
Latin
Daughter of Cebren.
Girl/Female
Hindu, Indian
One of the Name of Goddess Durga
Boy/Male
Hindu, Indian, Malayalam, Marathi
King of Serpents; Sheshnaag
Boy/Male
Tamil
Sing gods praise or glory, Lord Shiva
Boy/Male
Hindu
Decision, Confirmed
BLACKBOARD BOLD
BLACKBOARD BOLD
BLACKBOARD BOLD
BLACKBOARD BOLD
BLACKBOARD BOLD
n.
A thin stuff used for the backs of framed pictures, mirrors, etc.
n.
In England, a species of thrush (Turdus merula), a singing bird with a fin note; the merle. In America the name is given to several birds, as the Quiscalus versicolor, or crow blackbird; the Agelaeus phoeniceus, or red-winged blackbird; the cowbird; the rusty grackle, etc. See Redwing.
n.
A board worn across the back to give erectness to the figure.
n.
A board which supports the back wen one is sitting;
n.
A four-wheeled vehicle, having a long elastic board or frame resting on the bolsters or axletrees, and a seat or seats placed transversely upon it; -- called also buck wagon.
p. pr. & vb. n.
of Blackguard
imp. & p. p.
of Blackguard
n.
The European blackbird.
n.
A board serving as the back part of anything, as of a wagon.
a.
Scurrilous; abusive; low; worthless; vicious; as, blackguard language.
n.
A vagrant; a bootblack; a gamin.
n.
The European blackbird. See Blackbird.
n.
The criminals and vagrants or vagabonds of a town or community, collectively.
v. t.
To revile or abuse in scurrilous language.
n.
The cow blackbird.
n.
The conduct or language of a blackguard; ruffianism.
n.
A board attached to the rim of a water wheel to prevent the water from running off the floats or paddies into the interior of the wheel.
n.
A broad board painted black, or any black surface on which writing, drawing, or the working of mathematical problems can be done with chalk or crayons. It is much used in schools.
n.
The scullions and lower menials of a court, or of a nobleman's household, who, in a removal from one residence to another, had charge of the kitchen utensils, and being smutted by them, were jocularly called the "black guard"; also, the servants and hangers-on of an army.
n.
A person of stained or low character, esp. one who uses scurrilous language, or treats others with foul abuse; a scoundrel; a rough.