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  2. Gazebo (simulator) - Wikipedia

    en.wikipedia.org/wiki/Gazebo_(simulator)

    Gazebo Classic's latest and last major release is version 11, a long-term support release with end-of-life planned for January 2025. [4] All previously released versions of Gazebo also received long-term support, with minor updates being released for Gazebo 9 and 10 together with the release of Gazebo 11.0.0. [5]

  3. Scalar meson - Wikipedia

    en.wikipedia.org/wiki/Scalar_meson

    In high energy physics, a scalar meson is a meson with total spin 0 and even parity (usually noted as J P =0 +).In contrast, pseudoscalar mesons have odd parity. The first known scalar mesons have been observed since the late 1950s, with observations of numerous light states and heavier states proliferating since the 1980s.

  4. Queue automaton - Wikipedia

    en.wikipedia.org/wiki/Queue_automaton

    A queue machine, queue automaton, or pullup automaton (PUA) [citation needed] is a finite-state machine with the ability to store and retrieve data from an infinite-memory queue. Its design is similar to a pushdown automaton but differs by replacing the stack with this queue.

  5. Scalar field theory - Wikipedia

    en.wikipedia.org/wiki/Scalar_field_theory

    where is known as a Lagrangian density; d 4−1 x ≡ dx ⋅ dy ⋅ dz ≡ dx 1 ⋅ dx 2 ⋅ dx 3 for the three spatial coordinates; δ ij is the Kronecker delta function; and ∂ ρ = ∂/∂x ρ for the ρ-th coordinate x ρ. This is an example of a quadratic action, since each of the terms is quadratic in the field, φ.

  6. Lorentz scalar - Wikipedia

    en.wikipedia.org/wiki/Lorentz_scalar

    While the "position"-4-vectors of the events change between different inertial frames, their spacetime distance remains invariant under the corresponding Lorentz transformation. Other examples of Lorentz scalars are the "length" of 4-velocities (see below), or the Ricci curvature in a point in spacetime from general relativity , which is a ...

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    Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!

  8. Stack (mathematics) - Wikipedia

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

    A stack is called a stack in groupoids or a (2,1)-sheaf if it is also fibered in groupoids, meaning that its fibers (the inverse images of objects of C) are groupoids. Some authors use the word "stack" to refer to the more restrictive notion of a stack in groupoids.

  9. Shunting yard algorithm - Wikipedia

    en.wikipedia.org/wiki/Shunting_yard_algorithm

    */ /* This implementation does not implement composite functions, functions with a variable number of arguments, or unary operators. */ while there are tokens to be read: read a token if the token is: - a number: put it into the output queue - a function: push it onto the operator stack - an operator o 1: while ( there is an operator o 2 at the ...

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