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  2. 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.

  3. 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:

  4. Spanish irregular verbs - Wikipedia

    en.wikipedia.org/wiki/Spanish_irregular_verbs

    Online Spanish verb conjugation Free online Spanish verb conjugation; 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.

  5. 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]

  6. 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 ...

  7. 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 ...

  8. File:Quaternion 2.svg - Wikipedia

    en.wikipedia.org/wiki/File:Quaternion_2.svg

    You are free: to share – to copy, distribute and transmit the work; to remix – to adapt the work; Under the following conditions: attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made.

  9. Romance copula - Wikipedia

    en.wikipedia.org/wiki/Romance_copula

    The Spanish copulas are ser and estar.The latter developed as follows: stare → *estare → estar. The copula ser developed from two Latin verbs. Thus its inflectional paradigm is a combination: most of it derives from svm (to be) but the present subjunctive appears to come from sedeo (to sit) via the Old Spanish verb seer.