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The golden ratio's negative −φ and reciprocal φ−1 are the two roots of the quadratic polynomial x2 + x − 1. The golden ratio is also an algebraic number and even an algebraic integer. It has minimal polynomial. This quadratic polynomial has two roots, and. The golden ratio is also closely related to the polynomial.
Standard normal table. In statistics, a standard normal table, also called the unit normal table or Z table, [1] is a mathematical table for the values of Φ, the cumulative distribution function of the normal distribution. It is used to find the probability that a statistic is observed below, above, or between values on the standard normal ...
Phi (/ f aɪ /; [1] uppercase Φ, lowercase φ or ϕ; Ancient Greek: ϕεῖ pheî; Modern Greek: φι fi) is the twenty-first letter of the Greek alphabet. In Archaic and Classical Greek (c. 9th to 4th century BC), it represented an aspirated voiceless bilabial plosive ( [pʰ] ), which was the origin of its usual romanization as ph .
KJ-200, also known as by the NATO reporting name "Moth" or "Y-8 Balance Beam" is a Chinese Airborne early warning and control aircraft. LNER Class Y8, a class of British steam locomotives. Yangtze River Express, a IATA airline designator. Youth 8 summit, more commonly known as the Y8 summit, the youth counterpart to the G8 summit.
Trịnh Công Sơn (February 28, 1939 – April 1, 2001) was a Vietnamese musician, songwriter, painter and poet. [ 1 ] [ 2 ] He is widely considered to be Vietnam's best songwriter. His music explores themes of love, loss, and anti-war sentiments during the Vietnam War , for which he was censored by both the southern Republic of Vietnam and ...
1 (one, unit, unity) is a number, numeral, and glyph. 1 is the first and smallest positive integer of the infinite sequence of natural numbers.This fundamental property has led to its unique uses in other fields, ranging from science to sports, where it commonly denotes the first, leading, or top thing in a group. 1 is the unit of counting or measurement, a determiner for singular nouns, and a ...
Feeling invincible, they often teased the Russians in the trenches, shouting and swearing at them, and playing Ukrainian pop music or the national anthem in an attempt to intimidate them, he added.
Phi coefficient. In statistics, the phi coefficient (or mean square contingency coefficient and denoted by φ or rφ) is a measure of association for two binary variables. In machine learning, it is known as the Matthews correlation coefficient (MCC) and used as a measure of the quality of binary (two-class) classifications, introduced by ...