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1200 Metres
1 (one, unit, unity) is a number a single unit of counting or measurement. It is generally used as a standard mathematical length, for example, the unit vector is a vector of length 1. 1 is the first nonzero natural number and the first and smallest positive integer. This fundamental property has led to its unique uses in other fields, ranging from science to sports. It commonly denotes the first, leading, or top thing in a group. A fundamental mathematical property of 1 is to be a multiplicative identity, meaning that any number multiplied by 1 equals the same number. Most if not all properties of 1 can be deduced from this. In advanced mathematics, a multiplicative identity is often denoted 1, even if it is not a number. 1 is by convention not considered a prime number; this was not universally accepted until the mid-20th century. Additionally, 1 is the smallest possible difference between two distinct natural numbers. Etymology ''One'' originates from the Old English ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
AD 1
__NOTOC__ AD 1 or 1 CE is the epoch year for the Anno Domini (AD) Christian calendar era and also the 1st year of the Common Era (CE) and the 1st millennium and of the 1st century of the Christian and the common era. It was a common year starting on Saturday or Sunday,Sources disagree regarding the starting day of Julian year Anno Domino I (see leap year error for further information). a common year starting on Saturday by the proleptic Julian calendar, and a common year starting on Monday by the proleptic Gregorian calendar. In the Roman Empire, AD 1 was known as the Year of the Consulship of Caesar and Paullus, named after Roman consuls Gaius Caesar and Lucius Aemilius Paullus, and less frequently, as year AUC 754 (see '' ab urbe condita'') within the Roman Empire. The denomination "AD 1" for this year has been in consistent use since the mid-medieval period when the Anno Domini (AD) calendar era became the prevalent method in Europe for naming years. It was the beginnin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
