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  2. Locus (mathematics) - Wikipedia

    en.wikipedia.org/wiki/Locus_(mathematics)

    Each curve in this example is a locus defined as the conchoid of the point P and the line l.In this example, P is 8 cm from l. In geometry, a locus (plural: loci) (Latin word for "place", "location") is a set of all points (commonly, a line, a line segment, a curve or a surface), whose location satisfies or is determined by one or more specified conditions.

  3. Hodge conjecture - Wikipedia

    en.wikipedia.org/wiki/Hodge_conjecture

    Kollár (1992) found an example of a Hodge class α which is not algebraic, but which has an integral multiple which is algebraic. Rosenschon & Srinivas (2016) have shown that in order to obtain a correct integral Hodge conjecture, one needs to replace Chow groups, which can also be expressed as motivic cohomology groups, by a variant known as ...

  4. Open problem - Wikipedia

    en.wikipedia.org/wiki/Open_problem

    Two notable examples in mathematics that have been solved and closed by researchers in the late twentieth century are Fermat's Last Theorem [1] and the four-color theorem. [2] [3] An important open mathematics problem solved in the early 21st century is the Poincaré conjecture. Open problems exist in all scientific fields.

  5. Locus - Wikipedia

    en.wikipedia.org/wiki/Locus

    Locus (mathematics), the set of points satisfying a particular condition, often forming a curve Root locus analysis, a diagram visualizing the position of roots as a parameter changes

  6. List of unsolved problems in mathematics - Wikipedia

    en.wikipedia.org/wiki/List_of_unsolved_problems...

    Many mathematical problems have been stated but not yet solved. These problems come from many areas of mathematics, such as theoretical physics, computer science, algebra, analysis, combinatorics, algebraic, differential, discrete and Euclidean geometries, graph theory, group theory, model theory, number theory, set theory, Ramsey theory, dynamical systems, and partial differential equations.

  7. DNA profiling - Wikipedia

    en.wikipedia.org/wiki/DNA_profiling

    From country to country, different STR-based DNA-profiling systems are in use. In North America, systems that amplify the CODIS 20 [21] core loci are almost universal, whereas in the United Kingdom the DNA-17 loci system is in use, and Australia uses 18 core markers. [22] The true power of STR analysis is in its statistical power of discrimination.

  8. Locus (genetics) - Wikipedia

    en.wikipedia.org/wiki/Locus_(genetics)

    In genetics, a locus (pl.: loci) is a specific, fixed position on a chromosome where a particular gene or genetic marker is located. [1] Each chromosome carries many genes, with each gene occupying a different position or locus; in humans, the total number of protein-coding genes in a complete haploid set of 23 chromosomes is estimated at ...

  9. Ludics - Wikipedia

    en.wikipedia.org/wiki/Ludics

    By abstracting the notion of formulae and focusing on their concrete uses—that is distinct occurrences—it provides an abstract syntax for computer science, as loci can be seen as pointers on memory. The primary achievement of ludics is the discovery of a relationship between two natural, but distinct notions of type, or proposition.