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2 天前 · For other uses, see Metaphysics (disambiguation). The beginning of Aristotle's Metaphysics, one of the foundational texts of the discipline Metaphysics is the branch of philosophy that examines the basic structure of reality. It is often characterized as first philosophy, implying that it is more fundamental than other forms of philosophical ...
1 天前 · Laplace transform. In mathematics, the Laplace transform, named after its discoverer Pierre-Simon Laplace ( / ləˈplɑːs / ), is an integral transform that converts a function of a real variable (usually , in the time domain) to a function of a complex variable (in the complex-valued frequency domain, also known as s-domain, or s-plane ).
1 天前 · Catfish (or catfishes; order Siluriformes / s ɪ ˈ lj ʊər ɪ f ɔːr m iː z / or Nematognathi) are a diverse group of ray-finned fish.Named for their prominent barbels, which resemble a cat's whiskers, catfish range in size and behavior from the three largest species alive, the Mekong giant catfish from Southeast Asia, the wels catfish of Eurasia, and the piraíba of South America, to ...
2 天前 · This article has multiple issues. Please help improve it or discuss these issues on the talk page. (Learn how and when to remove these template messages) This article relies excessively on references to primary sources. Please improve this article by adding secondary or tertiary sources. Find sources: "List of Linux distributions" – news ...
2 天前 · Pearson correlation coefficient. Several sets of ( x , y) points, with the correlation coefficient of x and y for each set. The correlation reflects the strength and direction of a linear relationship (top row), but not the slope of that relationship (middle), nor many aspects of nonlinear relationships (bottom).
2 天前 · Evolution of the Hindu-Arabic digit Two modern handwritten fours Sculpted date "1481" in the Convent church of Maria Steinach in Algund, South Tirol, Italy.The upward loop signifies the number 4. Brahmic numerals represented 1, 2, and 3 with as many lines. 4 was simplified by joining its four lines into a cross that looks like the modern plus sign.
2 天前 · Same-sex marriage, also known as gay marriage, is the marriage of two people of the same legal sex. As of 2024,[update] marriage between same-sex couples is legally performed and recognized in 37 countries, with a total population of 1.4 billion people (17% of the world's population). The most recent country to legalise same-sex marriage is ...
