The 131st meridian west is a line of longitude located 131 degrees west of the Prime Meridian, which is defined as 0 degrees longitude and runs through Greenwich, England. The 131st meridian west travels from the North Pole to the South Pole, passing through several regions. In the United States, it crosses through states like Alaska, and it also goes through parts of Canada and Mexico.

The 141st meridian west is a line of longitude that is 141 degrees west of the Prime Meridian, which runs through Greenwich, England. This meridian runs from the North Pole to the South Pole, passing through parts of the northern and southern hemispheres. In North America, the 141st meridian west roughly forms part of the border between the U.S. state of Alaska and Canada. Further south, it crosses portions of the Pacific Ocean.

The 148th meridian east is a line of longitude that is located 148 degrees east of the Prime Meridian, which runs through Greenwich, England. This meridian runs from the North Pole to the South Pole and is used in geographical coordinate systems to determine locations on the Earth. The 148th meridian east passes through several countries and territories, primarily in the Pacific region. It crosses parts of Russia, specifically in the Kuril Islands, and touches the northern parts of Japan.

The 155th meridian east is a line of longitude located 155 degrees east of the Prime Meridian, which is at 0 degrees longitude. This meridian runs from the North Pole to the South Pole, passing through various countries and geographical features. In the Northern Hemisphere, the 155th meridian east passes through parts of Russia, particularly in the Chukotka Autonomous Okrug, and then moves into the Bering Sea.

The 15th century was a time of significant development in mathematics, particularly due to the Renaissance and the revival of classical knowledge. Here are some notable mathematicians from that period, organized by nationality: ### Italian - **Leonardo of Pisa (Fibonacci)** (c. 1170–1250): Although he lived earlier than the 15th century, his works, particularly the *Liber Abaci*, significantly influenced mathematics during the Renaissance period.

The 162nd meridian east is a line of longitude that is located 162 degrees east of the Prime Meridian, which runs through Greenwich, London. Meridians are used to measure distances east or west of the Prime Meridian. The 162nd meridian east runs from the North Pole to the South Pole.

The number 170 is an integer that follows 169 and precedes 171. It can be categorized in several ways: 1. **Mathematical Properties**: - It is an even number. - It is a composite number, meaning it has divisors other than 1 and itself. The divisors of 170 are 1, 2, 5, 10, 17, 34, 85, and 170.

The 18th meridian west is a line of longitude that is 18 degrees west of the Prime Meridian, which is located at 0 degrees longitude. This meridian runs from the North Pole to the South Pole and passes through several countries and bodies of water. In Europe, the 18th meridian west crosses parts of Norway (specifically the island of Svalbard), and it further passes through Greenland.

The 1942 Herefordshire TRE (Telecommunications Research Establishment) Halifax crash refers to an incident involving a British Royal Air Force (RAF) aircraft, specifically a Handley Page Halifax bomber, that crashed in Herefordshire, England during World War II. On 23rd December 1942, the Halifax Bomber V9977 was on a test flight when it encountered difficulties and subsequently crashed near the village of Llangarron.

1987 is a natural number that follows 1986 and precedes 1988. It is an integer and is often referenced in various contexts, such as historical events, cultural references, and mathematical properties. In terms of its properties: - It is an odd number. - It is a composite number, as it can be divided evenly by numbers other than 1 and itself (its factors include 1, 19, 97, and 1987).

In category theory, the concepts of full and faithful functors relate to the ways in which a functor preserves certain structures between categories.

The 2006 Argentine nuclear reactivation plan refers to a policy initiative articulated by the Argentine government aimed at revitalizing and expanding the country's nuclear energy program. Following a period of stagnation after the economic crises of the late 1990s and early 2000s, Argentina sought to re-establish itself as a significant player in the nuclear energy sector.

The 2011 Tōhoku earthquake and tsunami was a devastating natural disaster that struck the northeastern coast of Japan on March 11, 2011. It was one of the most powerful earthquakes ever recorded, with a magnitude of 9.0. The epicenter was located off the Pacific coast of Tōhoku, about 70 kilometers (43 miles) east of the city of Sendai.

The 2018 Google walkouts were a series of protests held by Google employees in November 2018. The walkouts were organized in response to the company's handling of sexual harassment allegations and the treatment of employees who reported such misconduct. The protests stemmed from a New York Times report that detailed how Google had reportedly paid millions of dollars in severance packages to executives accused of sexual harassment, effectively allowing them to leave the company without facing any significant consequences.

The 2019 World Jigsaw Puzzle Championship was an international competition held in November 2019 in Belgium. It brought together puzzle enthusiasts from around the world to compete in assembling jigsaw puzzles under timed conditions. The event featured competitors working on the same puzzle, showcasing both speed and skill in a challenging and engaging environment. Participants came from various countries, and the championship is part of a larger tradition of competitive jigsaw puzzling that has been growing in popularity.

Apollonius' problem involves finding a circle that is tangent to three given circles in a plane. This classic problem in geometry has several special cases depending on the configurations of the given circles. Here are some notable special cases: 1. **Tangency to Three Disjoint Circles**: If the three circles do not overlap and are positioned such that they are completely separated, there can be up to eight distinct circles that are tangent to all three given circles.

The number 20 is a whole number that follows 19 and precedes 21. It is an even number and can be expressed in various mathematical forms, such as a multiple of 10 (2 x 10) or as a sum of integers (e.g., 10 + 10). In Roman numerals, 20 is represented as XX. It is also the base of the vigesimal numeral system, which uses 20 as its base.

The 20th century saw significant contributions from Cuban mathematicians, many of whom were influential in various fields, including algebra, geometry, and applied mathematics. Some notable Cuban mathematicians from this period include: 1. **José C. Pérez** - Known for his work in mathematical analysis and functional analysis. 2. **César De la Fuente** - A prominent mathematician known for his contributions to the theory of differential equations and its applications.

Georgia has produced several notable mathematicians in the 20th century who made significant contributions to various fields of mathematics. Here are a few prominent figures: 1. **Andrey Kolmogorov (1903–1987)** - Though born in Russia, Kolmogorov had Georgian roots and is renowned for his work in probability theory and statistics. His contributions include the foundations of probability theory and the establishment of the modern axiomatic approach. 2. **Lazarus M.

Pragmatics is a subfield of linguistics that examines how context influences the interpretation of meaning in communication. While semantics focuses on the meaning of words and sentences in isolation, pragmatics considers how the context—such as the speaker's intentions, the relationship between speakers, cultural norms, and the situational context—shapes understanding. **Some key areas of study in pragmatics include:** 1. **Speech Acts**: This concept, introduced by philosophers like J.L.