fschieber/wit-captions huggingface dataset:
I områder med svage tv-signaler bliver analoge billeder grynede (nederst), mens digitale (øverst) vedbliver med at være skarpe, indtil de "bryder" op eller man får frosset billede og sort skærm. Højkvalitets analog fjernsyn kræver 46dB signal/støj-forhold, hvorimod digital tv kan nøjes med meget mindre og stadig være skarpere. Det er også grunden til at digitale sendere sender med væsentlig lavere effekt og derfor er sværere at modtage i nabolande.
English: Demonstrating Digital (ISDB-T) and Analog (NTSC) TV picture quality comparison, digital (upper) displays clear letters and vertical lines without distortion, analog (lower) presents distorted. Condition: TV Screen is displaying CATV signal on single coaxial cable reception by Panasonic DVD recorder DMR-XW-120 (with both digital and analog tuner type), output via "RCA connector" to Sony "Trinitron" TV. Each photo taken on 2008 Sept., 2, AM 7:45 within 1 minute. Screen content is weather forecasting of NHK. Japanese ISDB-T & NTSC system 日本語: 地デジ放送-ISDB-T（上）と地上アナログ放送-NTSC（下）の画面の品質の比較の例。 地デジの画面では文字や縦線のゆがみは見られないが、アナログ放送画面ではゆがんでいる。TV画面までの条件：CATV会社から配信される1本の同軸ケーブルの信号をパナソニックDVDレコーダーDMR-XW-120（地デジと地アナ用チューナ付き）受信し、「RCA端子」を介してSonyトリニトロンTVで表示。各写真は2008 Sept., 2, AM 7:45 の1分以内に撮影。画面内容はNHKの天気予報。日本でのISDB-TとNTSC方式
Pope Urban II preaches the First Crusade at the Council of Clermont "I, or rather the Lord, beseech you as Christ's heralds to publish this everywhere and to persuade all people of whatever rank, foot-soldiers and knights, poor and rich, to carry aid promptly to those Christians and to destroy that vile race from the lands of our friends. I say this to those who are present, it meant also for those who are absent. Moreover, Christ commands it."[29]
Bases aériennes argentines Distances à l'aéroport de Port Stanley[6] : Trelew : 580 milles marins (1 070 km), Comodoro Rivadavia : 480 milles marins (890 km), Puerto San Julián : 425 milles marins (787 km), Rio Gallegos : 435 milles marins (806 km) et Rio Grande : 380 milles marins (700 km).
En raison de la distance séparant les bases des îles, la durée moyenne dont disposaient les avions d'attaque argentins sur la zone cible était de deux minutes.
Argentine Air Force air bases during the 1982 Falklands War (Guerra de las Malvinas)
Canale dei Buranelli. Treviso se kanale en voetbrûe het, net soos sy ander argitektoniese en kunsskatte en sy groot verlese, aan die stad die bynaam "Klein-Venesië" besorg. Histories was Treviso in 1339 die eerste nedersetting in Veneto wat hom by die Venesiaanse Dogerepubliek aangesluit het. Vervolgens is dit uitgebou tot 'n vesting wat Venesië teen aanvalle uit die noorde sou beskerm. Kanale en ’n stadsmuur het deel uitgemaak van die versterkings
English:  Channel View, which runs along the via Buranelli " - TrevisoFrançais :  Vue du canal Buranelli, qui longe la "via Buranelli" - TrèviseItaliano :  Il canale dei Buranelli, che corre lungo la via Buranelli - Treviso
A derék-csípő arány megállapítása: Normális testtömegű személynél (balra) a derék kerületét a legvékonyabb résznél mérik, míg elhízott emberek esetében (jobbra) kb. 2,5 cm-el a köldök felett.[1] A bal oldali személynél a csípőkerületet a legszélesebb ponton mérik, míg a jobb oldali személynél a combcsont nagytompori részénél (trochanter major). A jobb oldali képen látható személy csal, mivel lábait nem zárta össze, ami magasabb csípőkerületet ad ki
La battaglia tra Cesare ed Ariovisto presso Mulhouse del 58 a.C.. Qui il comandante dei Germani ordinò l'esercito per tribù: prima quella degli Arudi, poi i Marcomanni, i Triboci, i Vangioni, i Nemeti, i Sedusi ed infine i Suebi. Ogni tribù, poi, fu circondata da carri e carrozze, affinché non ci fosse la possibilità di fuga per nessuno: sopra i carri c'erano le donne, che imploravano i loro uomini di non abbandonarle alla schiavitù dei Romani.[46]
Italiano: La battaglia tra Cesare ed Ariovisto presso Mulhouse del 58 a.C.
Писмо от цар Борис III до Българския национален студентски съюз (БНСС) в подкрепа за построяване на Студентския дом:
„С най-гореща симпатия посрещам благородното начинание за издигането на Дом на българския студент, където ще крепнат и обединяват сърцата и умовете си здрави и добре просветени граждани на България, които утре, работейки за Родината, ще бъдат добри ратници в международното сътрудничество за мирния общочовешки напредък.“ (19.12.1929)
English: A letter of support by the Bulgarian King Boris III towards the cause for the establishment of the National Student House in 1929.
Drivers of the Promstroy cooperative. They were involved in the transportation of people between the villages of Solnechny, Allakh-Yun and Ust-Maya in Yakutia in 1989-1990. And the transportation of goods: took cargo in the port of Ust-Maya. The workers of Promstroi (about 100 people) built (1) a building for BELAZ in Solnechny and (2) a building for the PROK-400 modular processing plant in Allakh-Yun for processing gold (400 tons of ore per day).
Русский: Водители кооператива Промстрой (Николай Родченко и Анатолий Крижановский), занимались перевозкой людей между посёлками Солнечный, Аллах-Юнь и Усть-Мая в Якутии в 1989-1990 годах. Также перевозили грузы, принятые в порту Усть-Мая. Рабочие Промстроя (около 100 человек) строили (1) помещение для БЕЛАЗов в Солнечном и (2) помещение для модульного обогатительного комплекса ПРОК-400 в Аллах-Юнь по переработке золота (400 тонн руды в сутки). English: Drivers of the Promstroy cooperative (Nikolai Rodchenko and Anatoly Krizhanovskiy). They were involved in the transportation of people between the villages of Solnechny, Allakh-Yun and Ust-Maya in Yakutia in 1989-1990. And the transportation of goods: took cargo in the port of Ust-Maya. The workers of Promstroi (about 100 people) built (1) a building for BELAZ in Solnechny and (2) a building for the PROK-400 modular processing plant in Allakh-Yun for processing gold (400 tons of ore per day).
«Abimeleks død», illustrasjon ved Paul Gustave Doré: «Abimelek rykket fram mot tårnet og angrep det. Men da han nærmet seg porten i tårnet for å sette ild på den, var det en kvinne som kastet en kvernstein i hodet på ham så skallen ble knust. Abimelek ropte fort til sin våpensvein: «Trekk sverdet og drep meg, så de ikke skal si at det var en kvinne som slo meg i hjel!» Da stakk tjeneren sverdet gjennom ham, så han døde.» (Dommernes bok 9:52-53)[1]
English: The Death of Abimelech (Jud. 9:50-56) Judges 9:52-53 So Abimelech came to the tower and fought against it, and approached the entrance of the tower to burn it with fire. But a certain woman threw an upper millstone on Abimelech's head, crushing his skull Русский: Смерть Авимелеха (Суд. 9:50-56)
Pike's Peak mountain with Manitou Springs in the center foreground (Colorado Springs is in the lower foreground). The image was taken from Stop at Pike's Peak on your Way to or from the Expositions for the 1915 Panama–Pacific International Exposition. The cog railway depot 6,570 feet (2,000 m) was situated on Ruxton Avenue in Manitou Springs (center foreground), and Ruxton Park is directly above the town along Ruxton Creek at 9,078 feet (2,767 m).
English: Pike's Peak mountain with Manitou Springs in the foreground. The image was taken from Stop at Pike's Peak on your Way to or from the Expositions (for 1915 Panama-Pacific International Exposition)
Yttre anatomin hos Hector-prickfisk (Lampanyctodes hectoris)
(1) - gällock (2) - sidolinje (3) - ryggfena (4) - fettfena (5) - stjärtspole (6) - stjärtfena (7) - analfena (8) - ljusorgan (fotofor) (9) - bukfenor (parvis) (10) - bröstfenor (parvis).

Många fiskar saknar ljusorgan, och hos de arter som har sådana varierar placeringen stort. Marulken, Lophius piscatorius, har till exempel ett "metspö" med ett lysande "bete" (illicium) ovanpå huvudet.
In a closed lake system like Mono Lake, coupled evaporation and CO2-degassing progresses will cause the lake water δ18O and δ13C (carbon and oxygen isotopes) to increase. During stable low stands or high stands, there is no correlation between δ13C and δ18O. Importantly, a transformation to an open lake system may also cause δ13C and δ18O to become uncorrelated. Following increased precipitation and surface runoff, the δ18O and δ13C will decrease.
English: How d18O and d13C may covary with changes in lake levels for Mono Lake.
Një përshtypje artistike e epokës së akullit të Tokës në maksimumet akullnajore. Bazuar në: Crowley, T. J. (1995). "Ice age terrestrial carbon changes revisited". Global Biogeochemical Cycles. 9 (3): 377–389. :1995GBioC...9..377C. doi:10.1029/95GB01107. Mungon ose është bosh parametri |language= (Ndihmë!)"Ice age terrestrial carbon changes revisited". Global Biogeochemical Cycles 9 (3): 377–389. Bibcode:1995GBioC...9..377C. doi:10.1029/95GB01107. 
English: Earth at the last glacial maximum of the current ice age. Based on: "Ice age terrestrial carbon changes revisited" by Thomas J. Crowley (Global Biogeochemical Cycles, Vol. 9, 1995, pp. 377-389 Inaccuracies: 1. The glacial cover of the alps is depicted incorrectly (compare "Map of Alpine Glaciations": ) 2. The vegetation zones in Africa and Arabia are inacurrate (compare "Last glacial vegetation map": )
Proclamation de Claude, toile de Lawrence Alma-Tadema, 1867. À défaut de qualité supérieure, Claude est un homme honnête, instruit et appliqué au travail, mais faible et maladroit. Il sera tout au long de son règne lié par les intrigues de ses femmes, Messaline et Agrippine, ou à l’influence de ses affranchis, Narcisse, Pallas, Calliste, Polybe, hommes intelligents, ambitieux et d’esprit novateur, qui seront les véritables maîtres du gouvernement.
Proclaiming Claudius Emperor by Lawrence Alma-Tadema
Vieille ferme en long du XIXe siècle, dans le bas du village, en moellons de grès et calcaire (colombage et brique ou brique à l'arrière, pignon droit enduit, ajouré). Elle fut autrefois exploitée par un certain Leclerc, puis un nommé Herman, reprise en 1924 par Arsène Laffineur et son épouse Joséphine Dellieu, venus de Bure, et finalement exploitée par Fernand Borcy, qui fut aussi échevin de la commune de Lesterny, et son épouse Marthe Laffineur.
Français : Ancienne ferme du bas du village de Lesterny photographiée par moi (Alain Canneel) en 1995. Pour plus de détails, voir la légende ou la revue Terres entre Wamme et Lhomme du cercle historique de l'entité de Nassogne.
Kennet and Avon Canal (to the north), Basingstoke Canal (to the south-east)   1794 proposal (Old Basing to Hamstead Marshall)   1810 proposal (Basingstoke to Fullerton, with a branch from Whitchurch to Hamstead Marshall)   1810 proposal (Old Basing to Hamstead Marshall, via Tadley and Brimpton   1824 proposal (Old Basing to Midgham)   20th century proposal (Greywell to Burghfield, with a branch to Basingstoke avoiding the fallen Greywell Tunnel)
English: Map of proposed routes of the Berks and Hants Canal
Gazdasági agyagtábla numerikus jelek és Proto-elámi írással. Agyagból készült számviteli kupon Uruk időszakból. Súsáni Akropoliszból. Feltárta Jacques de Morgan, 1907-ben. Louvre Múzeum, Orientális régiségek osztálya, Richelieu szoba 7., 5 tárgy. Az agrárkultúra kialakulás a Kr. e. 9000 évvel kezdődött, Kr. e. 4400-ban a ló háziasítása is megtörténik, ami két rendkívül fontos következménnyel járt. Az egyik a világ felfedezése... 2009. november 14.
English: Economic tablet with numeric signs and Proto-Elamite script. Clay accounting tokens, Uruk period. From the Tell of the Acropolis in Susa. Français : Tablette économique portant des signes numéraux et des signes d'écriture proto-élamite. Terre cuite, période d'Uruk. Provenance : tell de l'Acropole à Suse.
Former Geelong footballer Wallace Sharland was also a pioneer radio football commentator at the ABC and later at 3XY. This photo was taken at the microphone during a broadcast.  By his hand gestures, it appears to be an exciting moment of the game.  On the other hand, could he just be posing for the camera? Note the fence behind Sharland, which shows that broadcasters then had to broadcast from the outer of the ground, with no apparent privileges.
English: Australian rules football commentator Wallace Sharland during a broadcast
His excellency President Benigno S. Aquino III signed into law the postponement of election in ARMM Region[8] at the Ceremonial Hall in Malacanan Palace, Manila on June 30, 2011. (Seated L-R) Senate President Juan Ponce Enrile, President Aquino III, House Speaker Belmonte Jr., Representative Bai Sima. (Standing L-R) Datu Ansari Alonto, Aleem Said Basher, Dr. Hamid Barra, Aleem Jaafar Ali, Dr. Disomimba were invited to witness the signing ceremony.
English: signing ceremony of the postponement of ARMM election 2011.[1]
Schéma d'une fusée Atlas V 541 : 1 Premier étage - 2 Partie arrière de la coiffe - 3 Moteur RL-10 unique - 4 Deuxième étage Centaur - 5 Charge utile - 6 Adaptateur de la charge utile - 7 Plancher du compartiment de la charge utile - 8 Coiffe de 5,4 mètres de diamètre - 9 Adaptateur arrière étage Centaur - 10 Jupe de liaison inter-étages - 11 Adaptateur premier étage - 12 Propulseur d'appoint - 13 Jupe arrière/bouclier thermique - 14 Moteur RD-180.
English: Atlas-V-541-launch-vehicle,-expanded-view
Durant el segon viatge del Beagle, el naturalista Charles Darwin recollí fòssils a Sud-amèrica, i trobà fragments de cuirassa que li semblaven versions gegants de les escates dels armadillos moderns, que viuen a prop. Quan tornà, l'anatomista Richard Owen li mostrà que els fragments pertanyien a l'enorme cingulat extint Glyptodon, proper als armadillos. Aquest fou un dels patrons de distribució que ajudaren Darwin a desenvolupar la seva teoria.[4]
Comparison of Glyptodon and Nine-banded Armadillo, with text in Catalan
En el experimento, los fotones de una fuente de luz (fuera del marco en el lado derecho) son absorbidos por la superficie del disco de dióxido de titanio, excitando los electrones dentro del material. Estos reaccionan con las moléculas de agua, dividiéndola en sus componentes de hidrógeno y oxígeno. En este experimento, los productos químicos disueltos en el agua impiden la formación de oxígeno, que de otra manera se recombinaría con el hidrógeno.
English: In the reaction here, photons from the light source (which is just out of frame to the right of the picture) hit the surface of the titania disc, exciting electrons within the atomic structure These then react with the water molecules, splitting it into its constituents of hydrogen and oxygen. In this experiment, chemicals dissolved in the water prevent the formation of oxygen, which would otherwise recombine with the hydrogen.
Abzweigstelle Kostheim in Mainz-Kostheim an der Taunus-Eisenbahn und der Umgehungsbahn Mainz mit Stellwerk (rechts) – Auch moderne Stellwerke mit Relaistechnik wurden bevorzugt in die Nähe der Gleise gebaut: So können Bediener der Stellwerke bei Störungen der Gleisfreimeldeanlagen durch In­au­gen­schein­nah­me der betroffenen Bahnanlagen den Betriebsablauf beschleunigen und durch Zugbeobachtungen Unregelmäßigkeiten an Eisenbahnfahrzeugen entdecken
Deutsch: Gleise der Abzweigstelle Kostheim in Mainz-Kostheim in Wiesbaden von der Kommerzienrat-Disch-Brücke aus, Blickrichtung Ost: Bei der Abzweigstelle Kostheim überquert die Umgehungsbahn Mainz den Main und die Taunus-Eisenbahn: Die beiden linken Gleise sind Gleise der Umgehungsbahn Mainz, die beiden rechts daneben liegenden Gleise gehören zur Taunus-Eisenbahn, das rechte Gleis ist ein Verbindungsgleis der Taunus-Eisenbahn zur Eisenbahnbrücke Hochheim
Antica mappa del 1654 di Willem Blaeu con due gruppi di isole con le "Orcades" (Orcadi) a sinistra e "Schetlandia" (Shetland) a destra. Uno stemma in alto a sinistra mostra un leone rosso rampante in uno scudo giallo fiancheggiato da due unicorni. Un secondo stemma araldico si trova in basso a destra sotto l'"Oceanus Germanicus"; questo mostra due sirene che circondano una tavola con una scritta molto piccola, sormontata da uno scudo giallo e blu.
ORCADVM ET SCHETLANDIÆ - Orkney and Shetland
Légköri elektromágneses fedettség. Az energiaátvitel általában váltófeszültséget használ. Ennek következménye, hogy a Földnek alig van olyan pontja, ahol az 50, vagy 60 Hz-es hátteret ne lehetne kimutatni. A rádió, a televízió, a radar és a mobiltelefonok mind elektromágneses sugarakat dolgoznak fel, adójuk ilyen hullámokat bocsát ki. Ezek a sugárzások állandóan érnek minket, ennek ellenére a mai tudomány meglepően keveset tud élettani hatásaikról
Kennlinien von Spannungsquellen zeigen deren Klemmenspannung 
  
    
      
        
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 in Abhängigkeit von der Stromentnahme:
waagerecht: ideal;   geneigt: real linear;
gekrümmt: real nichtlinear, hier: Solarzelle. Die drei Geraden bilden ein Kennlinien­feld mit dem Quellwiderstand als Parameter.
Pongam o honge (Millettia pinnata) è nativo dell'India e cresce in profusione, generalmente piantato come albero da viale dal dipartimento forestale. È rinomato per la sua ombra ed è noto negli usi tradizionali per le sue proprietà medicinali. Viene anche coltivato come impianto ospitante per gli insetti Kerria lacca. L'albero è anche una delle piante che usa per alimentarsi il ceruleo comune (Jamides celeno), una specie di farfalla della Malaysia
English: Pongam or Honge (Pongamia pinnata) is a native of India and grows in profusion, generally planted as avenue trees by the forest department. It's renowned for its shade and is well known in traditional uses for its medicinal properties. It is also grown as a host plant for lac insects. The tree is also one of the food plants for Common Cerulean (Jamides celeno). The seeds contain pongam oil - a red brown inedible oil - that is now being explored as an alternate fuel source.
Строение дорсальной боковой линии у гвоздаря Световидова (правая сторона): A — переход переднего участка канала боковой линии, представленного трубчатыми чешуями, в участок, представленный свободными невромастами (3 невромаста показаны стрелкой). B — Вскрытый канал боковой линии между двумя порами, проходящий в трубчатой чешуе; стрелкой показан внутриканальный невромаст, иннервирующийся веточкой нерва, идущей вдоль канала к переднему краю чешуи[6]
English: Dorsal lateral line of Gvozdarus svetovidovi, 2nd known specimen: female, 613 mm TL, 515 mm SL, 21 Januray 1988, Enderby Land, Antarctica (described in: Shandikov G.A. & Kratkiy V.Y. (1990). Journal of Ichthyology. 30(8). P. 143-147
Weeghman Park, home of the Federal League champion Chicago Whales, as seen from Sheffield Avenue, in 1915. With the park now occupying all the land right up to Waveland Avenue, its left field area is substantially larger than it was the previous year, as is apparent from the considerable distance between the end of the left-field grandstand and the left-field corner.  For comparison, see the above picture taken from the same vantage point in 1914.
English: Weeghman Park, 1915.
Système hydrographique des Pyrénées. La ligne orange représente la ligne de partage des eaux nord-sud (vers la France ou vers l'Espagne). Les lignes bleus représentent les principales rivières issues du centre du massif : 1) Noguera Pallaresa, 2) Noguera Ribagorçana, 3) Cinca, 4) Aragon, 5) Saison, 6) Gave d'Aspe, 7) Gave d'Ossau, 9) Neste, 10) Garonne et 11) Ariège. Les lignes noires représentent les limites des bassins versants de chaque fleuve.
Français : Hydrographie, bassins de drainage, et failles actives des Pyrénées. Principaux fleuves issus des Pyrénées avec ligne de partage des eaux. Les numéros non entourés montrent les rivières : 1) Noguera Pallaresa; 2) Noguera Ribagorçana; 3) Cinca; 4) Aragon; 5) Saison; 6) Gave d'Aspe; 7) Gave d'Ossau; 9) Neste; 10) Garonne; 11) Ariège. Les numéros entourés montrent les localités : 1) fr:Pla de Beret et Liat Valley; 2: fr:Val d'Aran; 3: fr:Portet de Luchon and fr:vallée du Louron. English: Shaded relief map of the Pyrenees with the active faults and drainage divides; Non encircled numbers show rivers 1: Noguera Pallaresa; 2: Noguera Ribagorçana; 3: Cinca; 4: Aragon; 5: Saison; 6: Gave d'Aspe; 7: Gave d'Ossau; 9: Neste; 10: Garona; 11: Ariège. Encircled numbers show approximate localities 1: Beret Plains and Liat Valley; 2: Aran Valley; 3: Portet de Louchon and Louron valleys.
I likhet med Grenland har Fredrikstad/Sarpsborg en svært flerkjernet struktur. Mest sentrumspreg er det i nærheten av togstasjonene Fredrikstad og Sarpsborg, som ligger 15 km fra hverandre. Det er også sentrumspreg i Gamlebyen (3 km med bil fra Fredrikstad), mens handelens tyngdepunkt er Dikeveien (6 km fra Fredrikstad). Utenfor Sarpsborg vokser tre nye knutepunkter: motorveikryssene Alvim (2 km fra Sarpsborg), Grålum (4 km unna) og Kalnes (7 km).
English: Urban area of Fredrikstad-Sarpsborg
Sélection Lions des Flandres du 4 janvier 1914, avec en particulier Albert Eloy, Charles Dujardin, Henri Moigneu, Gabriel Hanot, Émile Dusart, Jean Degouve, Maurice Gravelines, Henri Lesur (3e en bas en partant de la gauche), Paul Chandelier (3e en bas en partant de la droite, avec un bandage), Raymond Dubly (2e en bas à partir de la droite), Alphonse Six (derrière au centre), Albert Parsys (avant-dernier à droite), Jean Ducret (dernier à droite).
Français : Sélection de l'équipe des Lions des Flandres de football, 4 janvier 1914 à Lille. Avec en particulier Albert Eloy, Charles Dujardin, Henri Moigneu, Gabriel Hanot, Émile Dusart, Jean Degouve, Maurice Gravelines, Henri Lesur (3e en bas en partant de la gauche), Paul Chandelier (3e en bas en partant de la droite, avec un bandage), Raymond Dubly (2e en bas à partir de la droite), Alphonse Six (derrière au centre), Albert Parsys (avant-dernier à droite), Jean Ducret (dernier à droite). Voir aussi Conditions d'utilisations des clichés de gallica.bnf.fr
Zbliżenie na grzbietową stronę skrzydłotułowia ważki Orthetrum caledonicum. Eps2: episternit śródtułowia, N2: śródplecze, PN2: zatarcza śródtułowia, N3: zaplecze, PN2: zatarcza zatułowia, HP1 i HP2 – płytki humeralne przedniego i tylnego skrzydła, AxP1 i AxP2 – płytki aksillalne przedniego i tylnego skrzydła, M: membranula, C: żyłka kostalna, Sc: żyłka subkostalna, R+M: scalone żyłka radialna i medialna, CuP: żyłka postkubitalna, 1A: żyłka analna.
English: Dorsal view of Blue Skimmer Dragonfly (Orthetrum caledonicum) with legend.
Amphipathische α-Helices können sich zu Überstrukturen, sog. „Coiled-Coils“ vereinigen. Grundlage sind „hydrophobe Bänder“ (links dargestellt), die immer dann entstehen, wenn die Aminosäuren a, d, a’, d’ in der Heptade hydrophob sind (zur Heptade siehe die Erläuterung zur obigen Abbildung).
 Teil A zeigt ein „coiled coil“ aus zwei, Teil B ein solches aus drei α-Helices (Projektion). Darüber hinaus wurden „tetrahelix bundle“-Strukturen beschrieben.
Icon of the Dormition by Theophan the Greek, 1392. The Theotokos is depicted lying on a bier, surrounded by the Twelve Apostles. At center, Jesus Christ is shown in a mandorla, swaddling the soul of the Virgin Mary (a red seraph is shown above his head). To either side of him are depicted the Hieromartyrs Dionysius the Areopagite and Ignatius the God-Bearer who, according to tradition, are responsible for transmitting the account of the dormition.
English: Dormition of the Theotokos (Uspenie Bogoroditsy)--i.e., the repose of the Virgin Mary 1392, by Theophan the Greek; the other side of an icon of Our Lady of the DonРусский: икона Феофана Грека - Успение Богородицы, 1392 год, оборот Донской иконы Божией Матери
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          R
        
      
    
    {\displaystyle \mathbb {R} }
  
 in 
  
    
      
        
          R
        
      
    
    {\displaystyle \mathbb {R} }
  
 è derivabile in un punto se è approssimabile vicino a quel punto da una retta. Tale retta deve quindi essere tangente al grafico della funzione. Questa nozione si estende in dimensioni arbitrarie, e prende il nome di funzione differenziabile.