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  2. Quaternion - Wikipedia

    en.wikipedia.org/wiki/Quaternion

    The conjugate of a product of two quaternions is the product of the conjugates in the reverse order. That is, if p and q are quaternions, then (pq) ∗ = q ∗ p ∗, not p ∗ q ∗. The conjugation of a quaternion, in stark contrast to the complex setting, can be expressed with multiplication and addition of quaternions:

  3. Spanish conjugation - Wikipedia

    en.wikipedia.org/wiki/Spanish_conjugation

    How is my Spanish: Spanish conjugation charts Spanish conjugation chart. Chart to conjugate in 7 different Spanish tenses. SpanishBoat: Verb conjugation worksheets in all Spanish tenses Printable and online exercises for teachers and students... Espagram: verb conjugator Spanish verb conjugator. Contains about a million verb forms.

  4. Spanish irregular verbs - Wikipedia

    en.wikipedia.org/wiki/Spanish_irregular_verbs

    Spanish conjugation Spanish conjugator. 12,000 verbs conjugated. Diccionario panhispánico de dudas. Apéndice 1: Modelos de conjugación verbal. decimos.net A Spanish verb conjugator, partly based on this Wikipedia article, that explains each conjugated form step by step. List of all Spanish irregular verbs Complete list of over 270 Spanish ...

  5. Spanish grammar - Wikipedia

    en.wikipedia.org/wiki/Spanish_grammar

    Every Spanish verb belongs to one of three form classes, characterized by the infinitive ending: -ar, -er, or -ir—sometimes called the first, second, and third conjugations, respectively. A Spanish verb has nine indicative tenses with more-or-less direct English equivalents: the present tense ('I walk'), the preterite ('I walked'), the ...

  6. Quaternions and spatial rotation - Wikipedia

    en.wikipedia.org/wiki/Quaternions_and_spatial...

    3D visualization of a sphere and a rotation about an Euler axis (^) by an angle of In 3-dimensional space, according to Euler's rotation theorem, any rotation or sequence of rotations of a rigid body or coordinate system about a fixed point is equivalent to a single rotation by a given angle about a fixed axis (called the Euler axis) that runs through the fixed point. [6]

  7. Spanish verbs - Wikipedia

    en.wikipedia.org/wiki/Spanish_verbs

    Spanish is a relatively synthetic language with a moderate to high degree of inflection, which shows up mostly in Spanish conjugation. As is typical of verbs in virtually all languages, Spanish verbs express an action or a state of being of a given subject, and like verbs in most Indo-European languages , Spanish verbs undergo inflection ...

  8. Neil Gaiman's ex-wife responds to sexual assault lawsuit: 'I ...

    www.aol.com/neil-gaimans-ex-wife-responds...

    If you or someone you know has experienced sexual violence, RAINN’s National Sexual Assault Hotline offers free, confidential, 24/7 support to survivors and their loved ones in English and ...

  9. Classical Hamiltonian quaternions - Wikipedia

    en.wikipedia.org/wiki/Classical_Hamiltonian...

    The product of a quaternion with its conjugate is its common norm. [63] The operation of taking the common norm of a quaternion is represented with the letter N. By definition the common norm is the product of a quaternion with its conjugate. It can be proven [64] [65] that common norm is equal to the square of the tensor of a quaternion ...