As of my last update in October 2023, "Portugal Current" does not refer to a widely recognized term or concept. It could potentially refer to various topics, such as current events, news, or updates related to Portugal.

San Antonio Canyon is a geographic area located in the San Gabriel Mountains of Southern California, specifically in the Angeles National Forest. It is known for its scenic beauty, recreational opportunities, and access to hiking trails. The canyon is situated near the city of Claremont and is part of a larger watershed that includes multiple streams and natural features. One of the key attractions in the area is the San Antonio Falls, which is a popular destination for hikers and nature enthusiasts.

Kőnig's theorem is a fundamental result in graph theory, specifically in the area of bipartite graphs and matching. It states that in any bipartite graph, the size of the maximum matching (the largest set of edges that do not share a vertex) is equal to the size of the minimum vertex cover (the smallest set of vertices such that every edge in the graph is incident to at least one vertex from this set).

A **claw-free graph** is a specific type of graph in graph theory that does not contain a particular induced subgraph known as a "claw." A claw is defined as a complete bipartite graph \( K_{1,3} \), which can be visualized as a star with one central vertex connected to three other vertices. In other words, a claw consists of one vertex (the center) connected to three other vertices (the leaves), with no other connections among them.

The British Journal of Mathematical and Statistical Psychology is a peer-reviewed academic journal that focuses on the application of mathematical and statistical methods to the fields of psychology. Established in 1948, the journal publishes original research articles, reviews, and methodological papers that deal with various aspects of psychological measurement, statistical modeling, and the mathematical foundations of psychological theories.

Smith Sound is a narrow strait located in the Arctic region, specifically separating Greenland from the northernmost part of Canada, particularly the northeastern coast of Ellesmere Island. It connects Baffin Bay to the north with the Arctic Ocean to the south. The sound is important for various reasons, including its role in navigation, its unique geological features, and its significance in studies related to climate change, wildlife habitats, and Indigenous cultures in the region.

The South Equatorial Current is a significant ocean current that flows westward just south of the equator in the Pacific, Atlantic, and Indian Oceans. It is primarily driven by the trade winds, which blow from east to west in the tropics.

Tressler Bank is not a widely recognized financial institution; you may be referring to a niche or local entity that might not have significant public information. It’s also possible that you are referencing a fictional or unique bank from a specific context, such as a book, movie, or game.

Tucker Seamount is an underwater mountain located in the western North Atlantic Ocean, specifically in the Bermuda Triangle region. It is characterized by its submerged peak that rises from the ocean floor, creating a prominent feature in the surrounding seafloor. Seamounts like Tucker are of interest to oceanographers and marine biologists because they can support diverse ecosystems and unique marine life due to their topographical features, which can create habitats and affect local ocean currents.

Whalers Bay is a location in Svalbard, an archipelago in the Arctic Ocean, part of Norway. The bay is situated near the historic settlement of Pyramiden, which was a Russian mining town that has been abandoned since the late 1990s. Whalers Bay is known for its historical significance, particularly in relation to whaling operations that took place in the 17th and 18th centuries.

The Yap Trench is a subduction zone located in the western Pacific Ocean, specifically to the east of the Yap Islands in Micronesia. It is formed by the convergence of the Pacific Plate and the smaller Yap Plate. In this geological setting, the Pacific Plate is being forced down into the mantle beneath the Yap Plate, leading to various geological phenomena such as earthquakes and the formation of deep ocean trenches.

Geology by sea or ocean, often referred to as marine geology or oceanography, is the study of the geological features and processes that occur in marine environments. This field encompasses a wide range of topics, including: 1. **Seafloor Geology:** Investigating the composition, structure, and processes of the ocean floor. This includes studying sediment types, rock formations, and tectonic features such as mid-ocean ridges, trenches, and continental shelves.

Aragonite refers to a mineral form of calcium carbonate (CaCO3), which is commonly found in marine environments. When discussing "aragonite sea," it typically refers to the conditions in oceans where aragonite is the dominant form of calcium carbonate being precipitated by marine organisms, such as corals and some shellfish.

The term "calcite sea" refers to a period in Earth's history when the oceans were saturated with calcium carbonate (CaCO₃), primarily in the form of calcite, which is one of the two main crystal forms of calcium carbonate (the other being aragonite). This concept is significant in understanding the composition of marine sediments and the development of marine life, particularly during the Paleozoic and early Mesozoic eras.

A carbonate platform is a marine geological structure characterized by significant deposits of carbonate minerals, primarily limestone and dolomite, which are formed in shallow marine environments. These platforms are typically found in tropical and subtropical regions and are associated with reef systems. Key features of carbonate platforms include: 1. **Formation**: Carbonate platforms form from the accumulation of calcium carbonate produced by organisms such as corals, shellfish, and microscopic calcareous algae.

The European Consortium for Ocean Research Drilling (ECORD) is an organization that facilitates and supports scientific ocean drilling efforts in Europe and collaborates with international partners. Established in 2001, ECORD serves as the European contribution to the Integrated Ocean Drilling Program (IODP), which is a global effort aimed at exploring the Earth's history and structure through deep-sea drilling.

Tanya Atwater is a prominent American geophysicist known for her research in plate tectonics and the geological processes that shape the Earth's crust. She is particularly recognized for her work on the tectonic evolution of the seafloor and the dynamics of plate movements. Atwater has contributed significantly to our understanding of the interactions between tectonic plates, especially in relation to the geological history of the western United States and the development of the San Andreas Fault system.

Xavier Le Pichon is a prominent French geophysicist known for his contributions to the field of plate tectonics and the understanding of the Earth's lithosphere dynamics. Born on March 16, 1937, he has played a significant role in advancing the scientific understanding of the processes that shape the Earth's surface. Le Pichon is best known for developing innovative models that explain the movement of tectonic plates and the mechanisms behind earthquakes and volcanic activity.

Fractional matching is a concept primarily used in graph theory and combinatorial optimization. It generalizes the idea of matching in bipartite graphs, allowing for a scenario where matches can be made in fractions rather than whole numbers, which means that connections between pairs of vertices can be partially utilized. ### Key Concepts: 1. **Matching**: In a traditional matching context, a matching in a graph is a set of edges such that no two edges share a vertex.

Matching preclusion is a concept primarily used in the field of graph theory and combinatorial optimization, particularly in the study of matchings in bipartite graphs. The central idea of matching preclusion is to identify and analyze conditions under which certain edges or vertices in a graph can be "excluded" from being part of any maximum matching.