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Topics referred to by the same term
DF-1 may refer to: DF-1 Protocol, a protocol used to communicate with most Allen Bradley RS232 interface modules Dongfeng-1, a missile Avimech Dragonfly
DF-1
Chinese strategic ballistic missile series
Dongfeng (Chinese: 东风; lit. 'East Wind') series, typically abbreviated as "DF missiles", are a family of short, medium, intermediate-range and intercontinental
Dongfeng_(missile)
DF-1 / DF1 protocol is an asynchronous byte-oriented protocol that is used to communicate with most Allen Bradley RS-232 interface modules. DF1 protocol
DF-1_Protocol
Shell command for reporting available file system space
df is a shell command for reporting the amount of available and consumed storage space on a file system. Although df is short for disk free, the command
Df_(Unix)
Intercontinental ballistic missile
(simplified Chinese: 东风-61; traditional Chinese: 東風-61; lit. 'East Wind-61', DF-61) is an intercontinental ballistic missile developed by the People’s Republic
DF-61
Intermediate-range ballistic missile
converted to the DF-21 by 2014. The missile was used as the basis for China's first launch vehicle, the Long March 1. Initial production of the DF-3 was rushed
DF-3A
Chinese nuclear and conventional intermediate-range ballistic missile
The Dongfeng-26 or DF-26 (simplified Chinese: 东风-26; traditional Chinese: 東風-26; lit. 'East Wind-26'; NATO reporting name: CH-SS-18) is an intermediate-range
DF-26
American helicopter
The Avimech Dragonfly DF-1 is an American helicopter produced by Avimech International Aircraft, Inc. of Tucson, Arizona. Originally developed in Switzerland
Avimech_Dragonfly_DF-1
Chinese experimental hypersonic glide vehicle
The DF-ZF is a hypersonic glide vehicle (HGV) developed by the People's Republic of China. It is launched by the DF-17 medium-range ballistic missile
DF-ZF
Chinese ICBM
The Dongfeng 4 (Chinese: 东风-4; pinyin: Dōng Fēng Sì; lit. 'East Wind 4') or DF-4 (also known as the CSS-3) is a first-generation two-stage liquid-fuelled
DF-4
Land-attack cruise missile
长剑-100; pinyin: Cháng Jiàn 100; lit. 'long sword 100')), military designation DF-100 (Chinese: 东风-100; pinyin: Dōngfēng 100; lit. 'East Wind 100'), NATO reporting
DF-100
Chinese cruise missile
150–350 in 2009. CJ-10 (DF-10) Baseline version. Known as DH-10 during the prototype phase. Sometimes called the DF-10. CJ-10A (DF-10A) Land-attack cruise
CJ-10_(missile)
Chinese intercontinental ballistic missile
The Dongfeng-41 or DF-41 (simplified Chinese: 东风-41; traditional Chinese: 東風-41; lit. 'East Wind-41'; NATO reporting name: CH-SS-20; previously reported
DF-41
Chinese short-range ballistic missile
short-range ballistic missile developed by the People's Republic of China. The DF-11 is a road-mobile short-range ballistic missile (SRBM) which began development
DF-11
Formula in calculus
1 d x = d f 1 d f 2 d f 2 d f 3 ⋯ d f n d x . {\displaystyle {\frac {df_{1}}{dx}}={\frac {df_{1}}{df_{2}}}{\frac {df_{2}}{df_{3}}}\cdots {\frac {df_{n}}{dx}}
Chain_rule
Formal argument for the existence of God
argument. Ax. 1. ( P ( φ ) ∧ ◻ ∀ x ( φ ( x ) ⇒ ψ ( x ) ) ) ⇒ P ( ψ ) Ax. 2. P ( ¬ φ ) ⇔ ¬ P ( φ ) Th. 1. P ( φ ) ⇒ ◊ ∃ x φ ( x ) Df. 1. G ( x ) ⇔ ∀ φ
Gödel's_ontological_proof
040.DF was a class of one prototype diesel-hydraulic locomotive built for the SNCF built in 1952 by Renault. In 1962 it was renumbered from 040.DF.1 to
SNCF_040.DF
Chinese ICBM
June 2017, five to ten Mod 1 and over fifteen Mod 2 launchers were operationally deployed. The PRC began developing the DF-31 ICBM in January 1985. The
DF-31
MRBM with HGV
ballistic missile designed to carry the DF-ZF hypersonic glide vehicle (HGV). The DF-17 uses the rocket booster from the DF-16B short-range ballistic missile
DF-17
Statistical model used in machine learning
{\frac {df_{1}^{-1}(z_{1})}{dz_{1}}}\right|} Where det d f 1 − 1 ( z 1 ) d z 1 {\displaystyle \det {\frac {df_{1}^{-1}(z_{1})}{dz_{1}}}} is the determinant
Flow-based_generative_model
North Germanic language
Alphabet transciption; the third is the gloss. Grein ˈkreiːn-∅ Article-N.SG.DF 1: ˈʔei-ht || one-NT.N.SG: Allir ˈʔatl-ɪr All-N.PL.IDF eru ɛr-ʏ be\PRS.IND-3PL
Icelandic_language
Musical artist
braunfels_herald_and_zeitung_usa_texas_new_braunfels_19730830_english_26&df=1&dt=9 "Kissing up the charts". SPIN: 54. June 1999. Retrieved 11 January 2011
Matt_Slocum
Chinese nuclear-capable air-launched ballistic missile
The JL-1 missile was first unveiled at the 2025 China Victory Day Parade. Analysts believed the JL-1 is an air-launched missile variant of the DF-21 medium-range
JL-1 (air-launched ballistic missile)
JL-1_(air-launched_ballistic_missile)
Internet protocol
flags defined within this field. Reserved (R): 1 bit Reserved. Should be set to 0. Don't Fragment (DF): 1 bit This field specifies whether the datagram
IP_in_IP
Criterion for integration in terms of elementary functions
F} such that f = c 1 D f 1 f 1 + ⋯ + c n D f n f n + D s . {\displaystyle f=c_{1}{\frac {Df_{1}}{f_{1}}}+\dotsb +c_{n}{\frac {Df_{n}}{f_{n}}}+Ds.} In
Liouville's theorem (differential algebra)
Liouville's_theorem_(differential_algebra)
Short-range ballistic missile
The Dong-Feng 15 (abbreviated as DF-15, also referred to as the M-9 and CSS-6) is a short-range ballistic missile developed by China. The United States
DF-15
Digital single-lens reflex camera
The Nikon Df is a full-frame F-mount DSLR FX format camera announced by Nikon on November 5, 2013. It uses dedicated mechanical controls similar to those
Nikon_Df
Players of the Germany national football team with 5 to 19 caps
Positions key GK Goalkeeper DF Defender MF Midfielder FW Forward
List of Germany international footballers (1–4 caps)
List_of_Germany_international_footballers_(1–4_caps)
Dongfeng 1 (SS-2) (DF-1) Dongfeng 2 (CSS-1) (DF-2) Dongfeng 3 (CSS-2) (DF-3) Dongfeng 4 (CSS-3) (DF-4) Dongfeng 5 (CSS-4) (DF-5) Dongfeng 11 (CSS-7) (DF-11)
List_of_missiles
89th season of the Ligue 1
The 2026–27 Ligue 1, also known as Ligue 1 McDonald's for sponsorship reasons, is the 89th season of the Ligue 1, France's premier football competition
2026–27_Ligue_1
Observation that in many real-life datasets, the leading digit is likely to be small
distribution depends on the degrees of freedom (df) with good agreement with df = 1 and decreasing agreement as the df increases. The F-distribution is fitted
Benford's_law
World's atomic warhead designs, 1945–present
Missiles: DF-1 DF-2 DF-3A DF-4 DF-5 DF-11 DF-15 DF-17 DF-21 DF-31 DF-31B DF-41 JL-1 JL-2 B-611 P-12 Cruise Missiles DH-10 CJ-10 HN1 HN2 HN3 CF-2 CF-1 SS-N-2
List_of_nuclear_weapons
Method for constructing a fixed-income yield curve
_{2}\cdot df_{2}+C_{n}\cdot \Delta _{3}\cdot df_{3}+\cdots +(1+C_{n}\cdot \Delta _{n})\cdot df_{n}} therefore d f n = ( 1 − ∑ i = 1 n − 1 C n ⋅ Δ i ⋅
Bootstrapping_(finance)
Scottish music event promoter
DF Concerts & Events (formerly known as Dance Factory Concerts) is a music and event promoter, which is based in and operates across Scotland. The company
DF_Concerts
Intermediate-range ballistic missile
DF-25 (Dong Feng-25) was a Chinese two-stage, solid-propellant, road-mobile Intermediate-range ballistic missile (IRBM). Missilethreat.com stated it could
DF-25
Early microprocessor
accumulator is the 8-bit 'D' register (Data register). The single bit carry flag is DF (Data Flag). Most operations use the D register, including arithmetic and
RCA_1802
Probability distribution
parameter. Cauchy ( 0 , 1 ) ∼ t ( d f = 1 ) {\displaystyle \operatorname {Cauchy} (0,1)\sim {\textrm {t}}(\mathrm {df} =1)\,} Student's t distribution
Cauchy_distribution
MRBM/IRBM
The Dongfeng 21 (DF-21; NATO reporting name CSS-5 - Dong-Feng (simplified Chinese: 东风; traditional Chinese: 東風; lit. 'East Wind') is a two-stage, solid-fuel
DF-21
Locally constant sheaf of abelian groups on topological space
functions on X, so ∇ 0 ( f 1 , … , f n ) = ( d f 1 , … , d f n ) {\displaystyle \nabla _{0}(f_{1},\dots ,f_{n})=(df_{1},\dots ,df_{n})} defines a flat connection
Local_system
3-volume treatise on mathematics, 1910–1913
of the sign "⊃" ✱1.01. p ⊃ q .=. ∾ p ∨ q. Df. ✱1.1. Anything implied by a true elementary proposition is true. Pp modus ponens (✱1.11 was abandoned in
Principia_Mathematica
National military force
constructed in Brazil 1 x Floating dock: DF-1 (1944), constructed in USA 1 x Training ship: Guaraní (1968), constructed in Spain 1 x Presidential yacht:
Paraguayan_Navy
Class of 30 diesel-electric locomotives
The New Zealand DF class locomotive of 1979 is a class of 30 Co-Co diesel-electric locomotives built by General Motors Diesel of Canada between 1979 and
New Zealand DF class locomotive (1979)
New_Zealand_DF_class_locomotive_(1979)
List of Danish footballers
22 12 Lars Larsen DF 1974 1979 22 0 Peter Løvenkrands FW 2002 2010 22 1 Nicolai Boilesen DF 2011 2022 22 1 Knud Christophersen DF 1929 1934 21 6 Johannes
List of Denmark men's international footballers (1–24 caps)
List_of_Denmark_men's_international_footballers_(1–24_caps)
Players of the Kosovo national football team
Retrieved 11 June 2021. "Valmir Sulejmani". eu-football.info. Retrieved 1 June 2021. "Eroll Zejnullahu". eu-football.info. Retrieved 11 June 2021. "Loret
List of Kosovo international footballers
List_of_Kosovo_international_footballers
Fourth version of the Internet Protocol
flags defined within this field. Reserved (R): 1 bit Reserved. Should be set to 0. Don't Fragment (DF): 1 bit This field specifies whether the datagram
IPv4
Theorem in symplectic geometry which generalizes Darboux's theorem
at each point, or equivalently d f 1 ( p ) ∧ … ∧ d f r ( p ) ≠ 0 , {\displaystyle df_{1}(p)\wedge \ldots \wedge df_{r}(p)\neq 0,} where {fi, fj} = 0.
Carathéodory–Jacobi–Lie theorem
Carathéodory–Jacobi–Lie_theorem
Unidos Méxicanos" (PDF) (in Spanish). Comisión de Box y Lucha Libre México D.F. Archived from the original (PDF) on November 30, 2006. Retrieved 2009-04-03
List of CMLL World Heavyweight Champions
List_of_CMLL_World_Heavyweight_Champions
Problem in Fourier analysis
_{-W}^{W}{\|U(f)\|}^{2}\,df}{\int _{-1/2}^{1/2}{\|U(f)\|}^{2}\,df}}.} It can be shown that U(f) has only isolated zeros and hence 0 < λ ( T , W ) < 1 {\displaystyle
Spectral concentration problem
Spectral_concentration_problem
In the mathematical field of functional analysis, DF-spaces, also written (DF)-spaces are locally convex topological vector space having a property that
DF-space
Genus of viruses
immune response of host cell. Viral protein 5 is an inducer of apoptosis for DF-1 cells. It relies on inhibiting the voltage-dependent anion channel 2 (VDCA2)
Avibirnavirus
88th season of the Ligue 1
The 2025–26 Ligue 1, also known as Ligue 1 McDonald's for sponsorship reasons, was the 88th season of the Ligue 1, France's premier football competition
2025–26_Ligue_1
Escape of gases from the atmosphere
{\displaystyle \Phi _{1}=\Phi _{1}^{\text{mol}}+\Phi _{1}^{\text{eddy}}=-Kn{\frac {df_{1}}{dz}}-D_{12}n_{1}\left({\frac {n^{2}}{n_{1}n_{2}}}{\frac {df_{1}}{dz}}+{\frac
Diffusion-limited_escape
Measure of the opposition to current flow by an internal electrical load
called impedance matching or a matched connection. In this case, ZS = ZL, DF = 1/1 = 1 . The actual output impedance for most devices is not the same as the
Output_impedance
Chinese diesel-electric locomotive class
DF-2026, DF-2012, DF-1683. At least 4 DFs in Guangxi: Nanning Chemical Factory have DF-1227 and DF-1210; Nanning Huqiu Steel Market have DF-1587; DF-1846
China_Railways_DF
Binary star in the constellation Taurus
DF Tauri (DF Tau) is a young binary star system in the constellation of Taurus located at a distance of approximately 580 light years from the Sun. It
DF_Tauri
Chinese launch site
(LA-2B)) Launch Area 3: located about 2.7 kilometres (1.7 mi) south of LA-2, used for DF-1, DF-2, and R-2 missile launches. North pad (41°16′59″N 100°18′17″E
Jiuquan Satellite Launch Center
Jiuquan_Satellite_Launch_Center
Psychiatric patient with a visual perception disorder
Patient DF is a woman with visual apperceptive agnosia who has been studied extensively due to the implications of her behavior for the two streams theory
Patient_DF
Fifth season of the top English women's association football league
The 2015 FA WSL 1 was the fifth season of the FA WSL, the top-level women's football league of England. The season was played from 25 March to 4 October
2015_FA_WSL_1
The DF-224 is a space-qualified computer used in space missions from the 1980s. It was built by Rockwell Autonetics. As with many spacecraft computers
DF-224
Naval Register and transferred to the Dominican Republic and redesignated DF-1. She is currently in Active Service as of 2017. It also shares the name with
USS_Endeavor_(AFDL-1)
Federal capital of Brazil
2024. "Lobos, córregos e candangos inspiram nomes de cidades do DF". agenciabrasilia.df.gov.br (in Portuguese). Retrieved 28 June 2024.[permanent dead
Brasília
Italian light helicopter
The DF Helicopters DF334 is a two-seat, single-engine light utility helicopter in development by Dragon Fly Helicopters in Northern Italy. The DF 334
DF_Helicopters_DF334
Political party in Denmark
The Danish People's Party (DPP; Danish: Dansk Folkeparti, DF) is a nationalist and right-wing populist political party in Denmark. It was formed in 1995
Danish_People's_Party
Correspondence between topics in Lie theory
identity element d f = d f e : Lie ( G ) → Lie ( H ) {\displaystyle df=df_{e}:\operatorname {Lie} (G)\to \operatorname {Lie} (H)} is a Lie algebra
Lie group–Lie algebra correspondence
Lie_group–Lie_algebra_correspondence
First member of China's Long March rocket family
ballistic missiles, namely the DF-3 class. Long March 1's first flight launched China's first satellite Dong Fang Hong 1 to space on 24 April 1970. Development
Long_March_1
The DF-02 by Tamiya is a 1/10 scale R/C buggy, based on the popular TT-01 platform, released in 2004. The buggy features a shaft-drive 4WD transmission
Tamiya_DF-02
German professional football club
1. FC Heidenheim 1846 is a German professional association football club from the town of Heidenheim, Baden-Württemberg. The club currently plays in the
1._FC_Heidenheim
dimension, df, which relates the mass and size of the object, thereby partially defining the object. For instance, a rod has df = 1 and a disk has df = 2. The
Unified_scattering_function
imitation of Soviet missile. The missile 1059 was later renamed as Dongfeng-1 (DF-1, 东风一号). While the imitation of Soviet missile was still in progress, the
History of the Chinese space program
History_of_the_Chinese_space_program
Chinese liquid rocket engine
since the DF-3 rocket and has been the main propulsion of the Long March 1 orbital launch vehicles. YF-1: Core engine. Flown originally on the DF-3. Used
YF-1
Allen-Bradley DeviceNet – an implementation of CIP, originally by Allen-Bradley DF-1 - used by Allen-Bradley ControlLogix, CompactLogix, PLC-5, SLC-500, and MicroLogix
List_of_automation_protocols
This is a list of footballers who have played 1 to 24 senior matches for AFC Bournemouth (previously Bournemouth & Boscombe Athletic). Appearances and
List of AFC Bournemouth players (1–24 appearances)
List_of_AFC_Bournemouth_players_(1–24_appearances)
Chemical reaction which breaks carbon-chlorine bonds via a reductant
desired dechlorination rates. It has been suggested that bioaugmentation with DF-1 can lead to enhanced reductive dechlorination rates of PCBs through stimulation
Reductive_dechlorination
2014 video game
Spacebase DF-9 is a space simulator video game developed by Double Fine Productions. It was prototyped during Double Fine's open Amnesia Fortnight 2012
Spacebase_DF-9
converted to the DF-21 by 2014. The missile was used as the basis for China's first launch vehicle, the Long March 1. The Dongfeng 21 (DF-21; NATO reporting
Nuclear_weapons_of_China
Football league season
Ferroviário (CE) 2-1 3-3 Serra (ES) - Atlético Sorocaba (SP) 4-3 1-2 CENE (MS) - Ceilândia (DF) 1-2 1-1 Volta Redonda (RJ) - Rio Branco (SP) 2-1 0-1 Independência
2005 Campeonato Brasileiro Série C
2005_Campeonato_Brasileiro_Série_C
1936 airliner flying boat series by Douglas
The Douglas DF was a commercial flying boat built by Douglas Aircraft Company, first flown on 24 September 1936. The DF could accommodate 32 passengers
Douglas_DF
Two-letter country codes defined in ISO 3166-1
ISO 3166-1 alpha-2 codes are two-letter country codes defined in ISO 3166-1, part of the ISO 3166 standard published by the International Organization
ISO_3166-1_alpha-2
1. FC Nürnberg 2026–27 football season
Kornburg v 1. FC Nürnberg SpVgg Ansbach v 1. FC Nürnberg 1. FC Nürnberg v SV Waldhof Mannheim Palermo v 1. FC Nürnberg 1. FC Nürnberg v Real Oviedo Source: Competitions
2026–27_1._FC_Nürnberg_season
Programming language for statistics
new_df # Print the current results. X Y Z A 2 6 12 B 20 30 42 > new_df$Z # Output the Z column [1] 12 42 > new_df$Z == new_df['Z'] && new_df[3] == new_df$Z
R_(programming_language)
Chemical compound
difluoride (DF), also known as EA-1251 or difluoro, is a chemical weapon precursor. Its chemical formula is CH3POF2. It is a Schedule 1 substance under
Methylphosphonyl_difluoride
Capital and most populous city of Mexico
the country's new and only federal district (Spanish: Distrito Federal or DF). After years of demands for greater political autonomy, residents won the
Mexico_City
Chinese aerospace academy
submarine-launched and land-based ballistic missiles, such as the JL-1, DF-1 and DF-21.[citation needed] Other names for Changfeng are : Second Academy
China_Chang_Feng
Pharmaceutical compound
Diaza-2C-DFLY, also known as 8-(aminoethyl)-1,5-dihydropyrrolo[2,3-f]indole, is a chemical compound of the phenethylamine family related to the FLY group
Diaza-2C-DFLY
Association football club in Germany
1. Fußball-Club Köln 01/07 e. V., better known as simply 1. FC Köln (German pronunciation: [ɛf ˈt͡seː ˈkœln] ) or FC Cologne in English, is a German professional
1._FC_Köln
German association football club
1. Fußball-Club Nürnberg Verein für Leibesübungen e. V., often called 1. FC Nürnberg (German pronunciation: [ɛfˌtseː ˈnʏʁnbɛʁk], English: 1st Football
1._FC_Nürnberg
Season of a Mexican football league
Laredo. Potros Zitácuaro was relocated to Mexico City and renamed Potros DF, as an Atlante F.C. reserve team. Due to the lack of local economic support
2002–03 Primera División A season
2002–03_Primera_División_A_season
Football club
again in Superleague 1 but finished in 14th place and relegated. After that won the Super League 2 and returned in Super League 1. In 2024-2025 finished
Levadiakos_F.C.
Slovak football club
1991–92 1.SNL (1st Slovak National football league) (1969–1993) Winners (2): 1979–80, 1989–90 Slovakia Slovenský Pohár (Slovak Cup) (1961–) Winners (1): 1992
1._FC_Tatran_Prešov
Professional wrestling championship
championship created and sanctioned by Comisión de Box y Lucha Libre Mexico D.F. ("the Mexico City Boxing and Wrestling Commission" in Spanish). Although
Mexican National Lightweight Championship
Mexican_National_Lightweight_Championship
040.DM.1 to 3, exx PLM 4.DMD.1 to 3 (prototype locomotives) BB 60041 ex 040.DF.1 (prototype locomotive) 1D1 60051 ex 141.DA.1, exx-PLM 141.AMD.1 (prototype
List_of_SNCF_classes
Czech association football club
1. FC Slovácko is a Czech football club based in Uherské Hradiště. The team was established in 1927 as SK Staré Město and on 1 July 2000 as 1. FC Synot
1._FC_Slovácko
Strategic SAM system
200 m/s (2,700 mph). DF-7/Dongfeng 7/M-7/Project 8610/CSS-8: Chinese surface-to-surface tactical ballistic missile converted from HQ-1/2/3/4. M-7 missile
S-75_Dvina
Family of IEEE standards for compatibility between operating systems
C17 language standard. POSIX mandates 512-byte default block sizes for the df and du utilities, reflecting the typical size of blocks on disks. When Richard
POSIX
Number of windings of a polytope around its center of symmetry
5/2}, has 20 triangular faces (df = 1), 30 edges and 12 pentagrammic vertex figures (dv = 2), giving 2·12 − 30 + 1·20 = 14 = 2D. This implies a density
Density_(polytope)
Television station in Brasília, Federal District, Brazil
TV Globo DF (channel 10; previously known as TV Globo Brasília) is a television station licensed to Brasília, Federal District, Brazil serving as the TV
TV_Globo_DF
US Army training center
45-07271945&fn=camp_ellis_news_usa_illinois_camp_ellis_19450727_english_1&df=1&dt=10&cid=3150 1624th Military Police Unit 417th, 418th, 419th, 420th, 617th
Camp_Ellis
Measure of loss-rate of energy of a mode of oscillation in a dissipative system
In physics, the dissipation factor (DF) is a measure of loss-rate of energy of a mode of oscillation (mechanical, electrical, or electromechanical) in
Dissipation_factor
Legislative organ of Trentino-Alto Adige, Italy
Holzeisen. Councillor Andreas Colli. Councillor Filippo Degasperi. Former DF councillor Andreas Leiter Reber. Councillor Jürgen Wirth Anderlan. "Trentino
Regional Council of Trentino-Alto Adige/Südtirol
Regional_Council_of_Trentino-Alto_Adige/Südtirol
South Korean football club
match against Jeju United on 8 March 2009, at Gangneung Stadium, winning 1–0 with a decisive goal from Yoon Jun-ha. The team continued their winning
Gangwon_FC
DF 1
DF 1
DF 1
DF 1
DF 1
DF 1
DF 1
DF 1
DF 1