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  2. Moore–Penrose inverse - Wikipedia

    en.wikipedia.org/wiki/Moore–Penrose_inverse

    In mathematics, and in particular linear algebra, the Moore–Penrose inverse ⁠ + ⁠ of a matrix ⁠ ⁠, often called the pseudoinverse, is the most widely known generalization of the inverse matrix. [1]

  3. PostgreSQL - Wikipedia

    en.wikipedia.org/wiki/PostgreSQL

    PostgreSQL (/ ˌ p oʊ s t ɡ r ɛ s k j u ˈ ɛ l / POHST-gres-kew-EL) [11] [12] also known as Postgres, is a free and open-source relational database management system (RDBMS) emphasizing extensibility and SQL compliance.

  4. Turing test - Wikipedia

    en.wikipedia.org/wiki/Turing_test

    The Turing Test later led to the development of 'chatbots', AI software entities developed for the sole purpose pf conducting text chat sessions with people. Now, chatbots have a more inclusive definition, defined as a computer program that can hold a conversation with a person, usually over the internet by OED.