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45-512: The Kyiv Zoo was founded in 1909 by the Nature Lovers Society, and was financed by various private donors and philanthropic efforts. During the early 20th century , after experiencing some initial setbacks and difficulties, the zoo limited its total number of animals to no more than 15-20 species at one time. During the their first winter season, many of the zoo's temperate , tropical and semi-tropical species had to be transferred to

90-400: A duodecimal rather than a decimal system for fractions , as the divisibility of twelve (12 = 2 × 3) makes it easier to handle the common fractions of 1 ⁄ 3 and 1 ⁄ 4 than does a system based on ten (10 = 2 × 5) . Notation for fractions other than 1 ⁄ 2 is mainly found on surviving Roman coins , many of which had values that were duodecimal fractions of

135-649: A numeral system that originated in ancient Rome and remained the usual way of writing numbers throughout Europe well into the Late Middle Ages . Numbers are written with combinations of letters from the Latin alphabet , each with a fixed integer value. The modern style uses only these seven: The use of Roman numerals continued long after the decline of the Roman Empire . From the 14th century on, Roman numerals began to be replaced by Arabic numerals ; however, this process

180-677: A Ukrainian postage stamp was introduced to mark the 100th anniversary of the zoo. In 2020, the zoo received a full renovation to improve the life of the animals in it. In response to concerns over the Russian military presence at the border, zoo director Kyrylo Trantin, began to prepare for the possibility of invasion about a week before it began. Trantin, with the advice of a zoo director in Haifa, Israel , stocked up on food supplies and materials to build additional enclosures or to repair existing ones. The zoo closed down for an indefinite amount of time following

225-456: A box or circle. Thus, 500 was like a Ɔ superimposed on a ⋌ or ⊢ , making it look like Þ . It became D or Ð by the time of Augustus, under the graphic influence of the letter D . It was later identified as the letter D ; an alternative symbol for "thousand" was a CIↃ , and half of a thousand or "five hundred" is the right half of the symbol, IↃ , and this may have been converted into D . The notation for 1000

270-435: A number, as in U.S. Copyright law (where an "incorrect" or ambiguous numeral may invalidate a copyright claim or affect the termination date of the copyright period). The following table displays how Roman numerals are usually written: The numerals for 4 ( IV ) and 9 ( IX ) are written using subtractive notation , where the smaller symbol ( I ) is subtracted from the larger one ( V , or X ), thus avoiding

315-587: A practice that goes back to very early clocks such as the Wells Cathedral clock of the late 14th century. However, this is far from universal: for example, the clock on the Palace of Westminster tower (commonly known as Big Ben ) uses a subtractive IV for 4 o'clock. Several monumental inscriptions created in the early 20th century use variant forms for "1900" (usually written MCM ). These vary from MDCCCCX for 1910 as seen on Admiralty Arch , London, to

360-539: A table of epacts , all written in Roman numerals. The use of N to indicate "none" long survived in the historic apothecaries' system of measurement: used well into the 20th century to designate quantities in pharmaceutical prescriptions. In later times, the Arabic numeral "0" has been used as a zero to open enumerations with Roman numbers. Examples include the 24-hour Shepherd Gate Clock from 1852 and tarot packs such as

405-553: Is closely associated with the ancient city-state of Rome and the Empire that it created. However, due to the scarcity of surviving examples, the origins of the system are obscure and there are several competing theories, all largely conjectural. Rome was founded sometime between 850 and 750 BC. At the time, the region was inhabited by diverse populations of which the Etruscans were the most advanced. The ancient Romans themselves admitted that

450-578: Is omitted, as in Latin (and English) speech: The largest number that can be represented in this manner is 3,999 ( MMMCMXCIX ), but this is sufficient for the values for which Roman numerals are commonly used today, such as year numbers: Prior to the introduction of Arabic numerals in the West, ancient and medieval users of Roman numerals used various means to write larger numbers (see § Large numbers below) . Forms exist that vary in one way or another from

495-457: Is reduced to ↀ , IↃↃ (5,000) to ↁ ; CCIↃↃ (10,000) to ↂ ; IↃↃↃ (50,000) to ↇ ; and CCCIↃↃↃ (100,000) to ↈ . It is likely IↃ (500) reduced to D and CIↃ (1000) influenced the later M . John Wallis is often credited with introducing the symbol for infinity ⟨∞⟩ , and one conjecture is that he based it on ↀ , since 1,000 was hyperbolically used to represent very large numbers. Using

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540-413: Is subtracted from 1). The word nulla (the Latin word meaning "none") was used to represent 0, although the earliest attested instances are medieval. For instance Dionysius Exiguus used nulla alongside Roman numerals in a manuscript from 525 AD. About 725, Bede or one of his colleagues used the letter N , the initial of nulla or of nihil (the Latin word for "nothing") for 0, in

585-559: Is that the word for 18 in Latin is duodeviginti ‍ —   literally "two from twenty"⁠—   while 98 is duodecentum (two from hundred) and 99 is undecentum (one from hundred). However, the explanation does not seem to apply to IIIXX and IIIC , since the Latin words for 17 and 97 were septendecim (seven ten) and nonaginta septem (ninety seven), respectively. The ROMAN() function in Microsoft Excel supports multiple subtraction modes depending on

630-440: Is unknown which symbol represents which number). As in the basic Roman system, the Etruscans wrote the symbols that added to the desired number, from higher to lower value. Thus, the number 87, for example, would be written 50 + 10 + 10 + 10 + 5 + 1 + 1 = 𐌣𐌢𐌢𐌢𐌡𐌠𐌠 (this would appear as 𐌠𐌠𐌡𐌢𐌢𐌢𐌣 since Etruscan was written from right to left.) The symbols ⟨𐌠⟩ and ⟨𐌡⟩ resembled letters of

675-674: The vinculum , conventional Roman numerals are multiplied by 1,000 by adding a "bar" or "overline", thus: The vinculum came into use in the late Republic , and it was a common alternative to the apostrophic ↀ during the Imperial era around the Roman world (M for '1000' was not in use until the Medieval period). It continued in use in the Middle Ages, though it became known more commonly as titulus , and it appears in modern editions of classical and medieval Latin texts. In an extension of

720-518: The C s and Ↄ s as parentheses) had its origins in Etruscan numeral usage. Each additional set of C and Ↄ surrounding CIↃ raises the value by a factor of ten: CCIↃↃ represents 10,000 and CCCIↃↃↃ represents 100,000. Similarly, each additional Ↄ to the right of IↃ raises the value by a factor of ten: IↃↃ represents 5,000 and IↃↃↃ represents 50,000. Numerals larger than CCCIↃↃↃ do not occur. Sometimes CIↃ (1000)

765-459: The vinculum , a three-sided box (now sometimes printed as two vertical lines and a vinculum ) is used to multiply by 100,000, thus: Vinculum notation is distinct from the custom of adding an overline to a numeral simply to indicate that it is a number. Both usages can be seen on Roman inscriptions of the same period and general location, such as on the Antonine Wall . The system

810-573: The 1940s ( World War II ), Kyiv was occupied by the Nazi German forces, and the zoo was used by the German garrison . Fortunately, the animals were evacuated out of the city, and later returned after the end of the war. In 1970 , the bird's pavilion was added, which is considered to be the largest in Europe to-date. In 1982 , an exhibit called Animals Island was presented, in which animals were separated from

855-417: The 2022 Russian invasion of Ukraine . Zookeepers said they were still keeping care of the animals inside, with about 50 staff members and about 30 family members living within the facility to care for the animals. The zoo occupies a territory of 40 hectares (99 acres). According to CBC, the zoo has 2,600 animals from 328 species, including a pair of elephants . 130 different kinds of trees and bushes decorate

900-638: The Julian calendar , the 1909th year of the Common Era (CE) and Anno Domini (AD) designations, the 909th year of the 2nd millennium , the 9th year of the 20th century , and the 10th and last year of the 1900s decade. As of the start of 1909, the Gregorian calendar was 13 days ahead of the Julian calendar, which remained in localized use until 1923. Roman numerals Roman numerals are

945-590: The " Form " setting. For example, the number "499" (usually CDXCIX ) can be rendered as LDVLIV , XDIX , VDIV or ID . The relevant Microsoft help page offers no explanation for this function other than to describe its output as "more concise". There are also historical examples of other additive and multiplicative forms, and forms which seem to reflect spoken phrases. Some of these variants may have been regarded as errors even by contemporaries. As Roman numerals are composed of ordinary alphabetic characters, there may sometimes be confusion with other uses of

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990-547: The 15th-century Sola Busca and the 20th century Rider–Waite packs. The base "Roman fraction" is S , indicating 1 ⁄ 2 . The use of S (as in VIIS to indicate 7 1 ⁄ 2 ) is attested in some ancient inscriptions and also in the now rare apothecaries' system (usually in the form SS ): but while Roman numerals for whole numbers are essentially decimal , S does not correspond to 5 ⁄ 10 , as one might expect, but 6 ⁄ 12 . The Romans used

1035-589: The Etruscan alphabet, but ⟨𐌢⟩ , ⟨𐌣⟩ , and ⟨𐌟⟩ did not. The Etruscans used the subtractive notation, too, but not like the Romans. They wrote 17, 18, and 19 as 𐌠𐌠𐌠𐌢𐌢, 𐌠𐌠𐌢𐌢, and 𐌠𐌢𐌢, mirroring the way they spoke those numbers ("three from twenty", etc.); and similarly for 27, 28, 29, 37, 38, etc. However, they did not write 𐌠𐌡 for 4 (nor 𐌢𐌣 for 40), and wrote 𐌡𐌠𐌠, 𐌡𐌠𐌠𐌠 and 𐌡𐌠𐌠𐌠𐌠 for 7, 8, and 9, respectively. The early Roman numerals for 1, 10, and 100 were

1080-446: The Etruscan ones: ⟨𐌠⟩ , ⟨𐌢⟩ , and ⟨𐌟⟩ . The symbols for 5 and 50 changed from ⟨𐌡⟩ and ⟨𐌣⟩ to ⟨V⟩ and ⟨ↆ⟩ at some point. The latter had flattened to ⟨⊥⟩ (an inverted T) by the time of Augustus , and soon afterwards became identified with the graphically similar letter ⟨ L ⟩ . The symbol for 100

1125-511: The basis of much of their civilization was Etruscan. Rome itself was located next to the southern edge of the Etruscan domain, which covered a large part of north-central Italy. The Roman numerals, in particular, are directly derived from the Etruscan number symbols : ⟨𐌠⟩ , ⟨𐌡⟩ , ⟨𐌢⟩ , ⟨𐌣⟩ , and ⟨𐌟⟩ for 1, 5, 10, 50, and 100 (they had more symbols for larger numbers, but it

1170-425: The clumsier IIII and VIIII . Subtractive notation is also used for 40 ( XL ), 90 ( XC ), 400 ( CD ) and 900 ( CM ). These are the only subtractive forms in standard use. A number containing two or more decimal digits is built by appending the Roman numeral equivalent for each, from highest to lowest, as in the following examples: Any missing place (represented by a zero in the place-value equivalent)

1215-451: The dots was variable and not necessarily linear . Five dots arranged like ( ⁙ ) (as on the face of a die ) are known as a quincunx , from the name of the Roman fraction/coin. The Latin words sextans and quadrans are the source of the English words sextant and quadrant . Each fraction from 1 ⁄ 12 to 12 ⁄ 12 had a name in Roman times; these corresponded to

1260-532: The employees of the garden. Four years after it was founded, a relatively large, permanent location on the outskirts of Kyiv was allotted to the zoo. In 1913 , the animals' winter facilities received central heating . By 1914 , as political instability in Imperial Russia had increased, the development of the zoo was limited. Only after the Russian Revolution (1917) ended did the zoo recover. During

1305-628: The food-storage area of the main Kyiv-Pasazhyrskyi railway station , as the zoo's founders and directors had not secured adequate overwintering facilities for all of their animals. Eventually, a suitable shelter was created at the A.V. Fomin Botanical Garden . As the Kyiv Zoo began to prosper, its number of animals being looked after increased, further limiting the available space. It was reported that occasional loose or escapee animals had frightened

1350-520: The general standard represented above. While subtractive notation for 4, 40 and 400 ( IV , XL and CD ) has been the usual form since Roman times, additive notation to represent these numbers ( IIII , XXXX and CCCC ) continued to be used, including in compound numbers like 24 ( XXIIII ), 74 ( LXXIIII ), and 490 ( CCCCLXXXX ). The additive forms for 9, 90, and 900 ( VIIII , LXXXX , and DCCCC ) have also been used, although less often. The two conventions could be mixed in

1395-627: The intermediate ones were derived by taking half of those (half an X is V , half a 𐌟 is ↆ and half a Φ/⊕ is D ). Then 𐌟 and ↆ developed as mentioned above. The Colosseum was constructed in Rome in CE 72–80, and while the original perimeter wall has largely disappeared, the numbered entrances from XXIII (23) to LIIII (54) survive, to demonstrate that in Imperial times Roman numerals had already assumed their classical form: as largely standardised in current use . The most obvious anomaly (

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1440-527: The more unusual, if not unique MDCDIII for 1903, on the north entrance to the Saint Louis Art Museum . There are numerous historical examples of IIX being used for 8; for example, XIIX was used by officers of the XVIII Roman Legion to write their number. The notation appears prominently on the cenotaph of their senior centurion Marcus Caelius ( c.  45 BC – 9 AD). On

1485-407: The names of the related coins: Other Roman fractional notations included the following: The Romans developed two main ways of writing large numbers, the apostrophus and the vinculum , further extended in various ways in later times. Using the apostrophus method, 500 is written as IↃ , while 1,000 is written as CIↃ . This system of encasing numbers to denote thousands (imagine

1530-547: The publicly displayed official Roman calendars known as Fasti , XIIX is used for the 18 days to the next Kalends , and XXIIX for the 28 days in February. The latter can be seen on the sole extant pre-Julian calendar, the Fasti Antiates Maiores . There are historical examples of other subtractive forms: IIIXX for 17, IIXX for 18, IIIC for 97, IIC for 98, and IC for 99. A possible explanation

1575-517: The same digit to represent different powers of ten). This allows some flexibility in notation, and there has never been an official or universally accepted standard for Roman numerals. Usage varied greatly in ancient Rome and became thoroughly chaotic in medieval times. The more recent restoration of a largely "classical" notation has gained popularity among some, while variant forms are used by some modern writers as seeking more "flexibility". Roman numerals may be considered legally binding expressions of

1620-674: The same document or inscription, even in the same numeral. For example, on the numbered gates to the Colosseum , IIII is systematically used instead of IV , but subtractive notation is used for XL ; consequently, gate 44 is labelled XLIIII . Especially on tombstones and other funerary inscriptions, 5 and 50 have been occasionally written IIIII and XXXXX instead of V and L , and there are instances such as IIIIII and XXXXXX rather than VI or LX . Modern clock faces that use Roman numerals still very often use IIII for four o'clock but IX for nine o'clock,

1665-448: The same letters. For example, " XXX " and " XL " have other connotations in addition to their values as Roman numerals, while " IXL " more often than not is a gramogram of "I excel", and is in any case not an unambiguous Roman numeral. As a non- positional numeral system , Roman numerals have no "place-keeping" zeros. Furthermore, the system as used by the Romans lacked a numeral for the number zero itself (that is, what remains after 1

1710-462: The title screens of movies and television programs. MCM , signifying "a thousand, and a hundred less than another thousand", means 1900, so 1912 is written MCMXII . For the years of the current (21st) century, MM indicates 2000; this year is MMXXIV (2024). Roman numerals use different symbols for each power of ten, and there is no zero symbol, in contrast with the place value notation of Arabic numerals (in which place-keeping zeros enable

1755-448: The unit as . Fractions less than 1 ⁄ 2 are indicated by a dot ( · ) for each uncia "twelfth", the source of the English words inch and ounce ; dots are repeated for fractions up to five twelfths. Six twelfths (one half), is S for semis "half". Uncia dots were added to S for fractions from seven to eleven twelfths, just as tallies were added to V for whole numbers from six to nine. The arrangement of

1800-528: The visitors by small canals . The Animals Island houses the zoo's large cats (like lions and tigers ). In 1996 , the zoo was admitted to the European Association of Zoos and Aquaria (EAZA); however, it was expelled and banned in 2017 over poor conditions, and of mistreatment of animals. As of April 2018, the zoo is a "Candidate for Membership" with EAZA, and as such is being supported towards resuming full membership. In 2008, some 51 animals died in

1845-527: The zoo's islands. The zoo is also a research centre, working on acclimatization of far land animals, and preserving and reproduction of rare animals, such as the Amur tigers , bisons , Przewalski's Horses and some others. The zoo has since been refurbished since 2017. 1909 1909 ( MCMIX ) was a common year starting on Friday of the Gregorian calendar  and a common year starting on Thursday of

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1890-419: The zoo. A series of controversial deaths also unfolded in 2010, when a 39-year-old elephant died at Kyiv Zoo on April 26, followed by a camel on May 26, and a bison on May 31. The city administration and the zoo authorities blamed poisoning of the animals as cause of the deaths, while animal rights activists accused the substandard living conditions, negligent handling and unqualified zoo administration. In 2009,

1935-484: Was a circled or boxed X : Ⓧ, ⊗ , ⊕ , and by Augustan times was partially identified with the Greek letter Φ phi . Over time, the symbol changed to Ψ and ↀ . The latter symbol further evolved into ∞ , then ⋈ , and eventually changed to M under the influence of the Latin word mille "thousand". According to Paul Kayser, the basic numerical symbols were I , X , 𐌟 and Φ (or ⊕ ) and

1980-503: Was gradual, and the use of Roman numerals persisted. One place they are often seen is on clock faces . For instance, on the clock of Big Ben (designed in 1852), the hours from 1 to 12 are written as: The notations IV and IX can be read as "one less than five" (4) and "one less than ten" (9), although there is a tradition favouring the representation of "4" as " IIII " on Roman numeral clocks. Other common uses include year numbers on monuments and buildings and copyright dates on

2025-400: Was written variously as ⟨𐌟⟩ or ⟨ↃIC⟩ , and was then abbreviated to ⟨ Ↄ ⟩ or ⟨ C ⟩ , with ⟨ C ⟩ (which matched the Latin letter C ) finally winning out. It might have helped that C was the initial letter of CENTUM , Latin for "hundred". The numbers 500 and 1000 were denoted by V or X overlaid with

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