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  2. Verner's law - Wikipedia

    en.wikipedia.org/wiki/Verner's_law

    The change described by Verner's Law also accounts for Proto-Germanic *z as the development of Proto-Indo-European *s in some words. Since this *z changed to *r in the North Germanics and in West Germanic (German, Dutch, English, Frisian), Verner's Law resulted in alternation of *s and *r in some inflectional paradigms, known as grammatischer ...

  3. Initial and terminal objects - Wikipedia

    en.wikipedia.org/wiki/Initial_and_terminal_objects

    In Ring, the category of rings with unity and unity-preserving morphisms, the ring of integers Z is an initial object. The zero ring consisting only of a single element 0 = 1 is a terminal object. In Rig, the category of rigs with unity and unity-preserving morphisms, the rig of natural numbers N is an initial object.

  4. Initial sound table - Wikipedia

    en.wikipedia.org/wiki/Initial_sound_table

    The first initial sound table was created in 1658 by John Amos Comenius in Orbis Pictus, a picture book intended for children. They were popularized in the German-speaking areas by Jürgen Reichen who used initial sound tables to assist students to recognise initial sounds and to get first reading and writing skills.

  5. Glossary of mathematical symbols - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_mathematical...

    A mathematical symbol is a figure or a combination of figures that is used to represent a mathematical object, an action on mathematical objects, a relation between mathematical objects, or for structuring the other symbols that occur in a formula. As formulas are entirely constituted with symbols of various types, many symbols are needed for ...

  6. Autostereogram - Wikipedia

    en.wikipedia.org/wiki/Autostereogram

    This is an example of a wallpaper with repeated horizontal patterns. Each pattern is repeated exactly every 140 pixels. The illusion of the pictures lying on a flat surface (a plane) further back is created by the brain. Non-repeating patterns such as arrows and words, on the other hand, appear on the plane where this text lies.

  7. AOL Mail

    mail.aol.com

    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. Ideogram - Wikipedia

    en.wikipedia.org/wiki/Ideogram

    Ideograms that represent physical objects by visually resembling them are called pictograms. Numerals and mathematical symbols are ideograms, for example 1 'one', 2 'two', + 'plus', and = 'equals'. The ampersand & is used in many languages to represent the word and, originally a stylized ligature of the Latin word et.

  9. Voiced alveolar fricative - Wikipedia

    en.wikipedia.org/wiki/Voiced_alveolar_fricative

    As the International Phonetic Alphabet does not have separate symbols for the alveolar consonants (the same symbol is used for all coronal places of articulation that are not palatalized), it can represent the sound as in a number of ways including ð̠ or ð͇ (retracted or alveolarized [ð], respectively), ɹ̝ (constricted [ɹ]), or d̞ ...