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  2. Learning Tools Interoperability - Wikipedia

    en.wikipedia.org/wiki/Learning_Tools...

    Learning Tools Interoperability (LTI) is a standard developed by 1EdTech formerly known as IMS Global Learning Consortium at the time of creation. It enables seamless integration between learning systems and external systems. [1] In its current version, v1.3, this is done using OAuth2, OpenID Connect, and JSON Web Tokens.

  3. Matrix exponential - Wikipedia

    en.wikipedia.org/wiki/Matrix_exponential

    The solution of = (), =, where A is a constant matrix and y is a column vector, is given by =. The matrix exponential can also be used to solve the inhomogeneous equation d d t y ( t ) = A y ( t ) + z ( t ) , y ( 0 ) = y 0 . {\displaystyle {\frac {d}{dt}}y(t)=Ay(t)+z(t),\quad y(0)=y_{0}.}

  4. Systems science - Wikipedia

    en.wikipedia.org/wiki/Systems_science

    Systems science, also referred to as systems research or simply systems, [1] is a transdisciplinary [2] field that is concerned with understanding simple and complex systems in nature and society, which leads to the advancements of formal, natural, social, and applied attributions throughout engineering, technology and science, itself.

  5. Geometric series - Wikipedia

    en.wikipedia.org/wiki/Geometric_series

    The geometric series is an infinite series derived from a special type of sequence called a geometric progression.This means that it is the sum of infinitely many terms of geometric progression: starting from the initial term , and the next one being the initial term multiplied by a constant number known as the common ratio .

  6. John von Neumann - Wikipedia

    en.wikipedia.org/wiki/John_von_Neumann

    The positive solution for spaces of dimension at most two, and the negative solution for higher dimensions, comes from the fact that the Euclidean group is a solvable group for dimension at most two, and is not solvable for higher dimensions. "Thus, according to von Neumann, it is the change of group that makes a difference, not the change of ...

  7. Complex number - Wikipedia

    en.wikipedia.org/wiki/Complex_number

    For example, the equation (+) = has no real solution, because the square of a real number cannot be negative, but has the two nonreal complex solutions + and . Addition, subtraction and multiplication of complex numbers can be naturally defined by using the rule i 2 = − 1 {\displaystyle i^{2}=-1} along with the associative , commutative , and ...

  8. Markov chain - Wikipedia

    en.wikipedia.org/wiki/Markov_chain

    This is an equivalence relation which yields a set of communicating classes. A class is closed if the probability of leaving the class is zero. A Markov chain is irreducible if there is one communicating class, the state space. A state i has period k if k is the greatest common divisor of the number of transitions by which i can be reached ...

  9. Chess - Wikipedia

    en.wikipedia.org/wiki/Chess

    The chess machine is an ideal one to start with, since: (1) the problem is sharply defined both in allowed operations (the moves) and in the ultimate goal (checkmate); (2) it is neither so simple as to be trivial nor too difficult for satisfactory solution; (3) chess is generally considered to require "thinking" for skillful play; a solution of ...