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  2. System of linear equations - Wikipedia

    en.wikipedia.org/wiki/System_of_linear_equations

    A linear system in three variables determines a collection of planes. The intersection point is the solution. In mathematics, a system of linear equations (or linear system) is a collection of two or more linear equations involving the same variables. [1] [2] For example,

  3. Linear equation over a ring - Wikipedia

    en.wikipedia.org/wiki/Linear_equation_over_a_ring

    there is an algorithm for testing if two elements of R have the same image in R/I: testing the equality of the images of a and b amounts to solving the equation a = b + a 1 z 1 + ⋯ + a k z k; linear algebra is effective over R/I: for solving a linear system over R/I, it suffices to write it over R and to add to one side of the i th equation a ...

  4. Indeterminate system - Wikipedia

    en.wikipedia.org/wiki/Indeterminate_system

    In mathematics, particularly in algebra, an indeterminate system is a system of simultaneous equations (e.g., linear equations) which has more than one solution (sometimes infinitely many solutions). [1] In the case of a linear system, the system may be said to be underspecified, in which case the presence of more than one solution would imply ...

  5. Linear algebra - Wikipedia

    en.wikipedia.org/wiki/Linear_algebra

    With respect to general linear maps, linear endomorphisms and square matrices have some specific properties that make their study an important part of linear algebra, which is used in many parts of mathematics, including geometric transformations, coordinate changes, quadratic forms, and many other part of mathematics.

  6. Positional notation - Wikipedia

    en.wikipedia.org/wiki/Positional_notation

    A remnant of this system may be seen in the modern word for 40, daoichead. The Welsh language continues to use a base-20 counting system, particularly for the age of people, dates and in common phrases. 15 is also important, with 16–19 being "one on 15", "two on 15" etc. 18 is normally "two nines". A decimal system is commonly used.

  7. Hypercomplex number - Wikipedia

    en.wikipedia.org/wiki/Hypercomplex_number

    Putting aside the bases which contain an element e i such that e i 2 = 0 (i.e. directions in the original space over which the quadratic form was degenerate), the remaining Clifford algebras can be identified by the label Cl p,q (), indicating that the algebra is constructed from p simple basis elements with e i 2 = +1, q with e i 2 = −1, and ...

  8. AOL Mail for Verizon Customers - AOL Help

    help.aol.com/products/aol-mail-verizon

    1-800-358-4860. Get live expert help with your AOL needs—from email and passwords, technical questions, mobile email and more. AOL Mail for Verizon Customers.

  9. Glossary of mathematical symbols - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_mathematical...

    2. In geometry and linear algebra, denotes the cross product. 3. In set theory and category theory, denotes the Cartesian product and the direct product. See also × in § Set theory. · 1. Denotes multiplication and is read as times; for example, 3 ⋅ 2. 2. In geometry and linear algebra, denotes the dot product. 3.

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