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  2. Glossary of mathematical symbols - Wikipedia

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

    3. Between two groups, may mean that the first one is a proper subgroup of the second one. > (greater-than sign) 1. Strict inequality between two numbers; means and is read as "greater than". 2. Commonly used for denoting any strict order. 3. Between two groups, may mean that the second one is a proper subgroup of the first one. ≤ 1.

  3. List of emoticons - Wikipedia

    en.wikipedia.org/wiki/List_of_emoticons

    A simple smiley. This is a list of emoticons or textual portrayals of a writer's moods or facial expressions in the form of icons.Originally, these icons consisted of ASCII art, and later, Shift JIS art and Unicode art.

  4. Notation for differentiation - Wikipedia

    en.wikipedia.org/wiki/Notation_for_differentiation

    Leibniz's notation for differentiation does not require assigning meaning to symbols such as dx or dy (known as differentials) on their own, and some authors do not attempt to assign these symbols meaning. [1] Leibniz treated these symbols as infinitesimals.

  5. List of abbreviations used in medical prescriptions - Wikipedia

    en.wikipedia.org/wiki/List_of_abbreviations_used...

    a.d. auris dextra: right ear a single-storey a can be mistaken as an o which could read "o.d.", meaning right eye ad., add. adde addatur: add let there be added ad lib. ad libitum: Latin, "at one's pleasure"; as much as one desires; freely compare pro re nata, "as needed", which by convention includes an aspect of "up to some maximum".

  6. Percentage - Wikipedia

    en.wikipedia.org/wiki/Percentage

    An increase of 100% in a quantity means that the final amount is 200% of the initial amount (100% of initial + 100% of increase = 200% of initial). In other words, the quantity has doubled. An increase of 800% means the final amount is 9 times the original (100% + 800% = 900% = 9 times as large).

  7. Roman numerals - Wikipedia

    en.wikipedia.org/wiki/Roman_numerals

    It became D or Ð by the time of Augustus, under the graphic influence of the letter D. It was later identified as the letter D; an alternative symbol for "thousand" was a CIↃ, and half of a thousand or "five hundred" is the right half of the symbol, IↃ, and this may have been converted into D. [22]

  8. List of mathematical abbreviations - Wikipedia

    en.wikipedia.org/wiki/List_of_mathematical...

    A.M. – arithmetic mean. AP – arithmetic progression. arccos – inverse cosine function. arccosec – inverse cosecant function. (Also written as arccsc.) arccot – inverse cotangent function. arccsc – inverse cosecant function. (Also written as arccosec.) arcexc – inverse excosecant function. (Also written as arcexcsc, arcexcosec.)

  9. D - Wikipedia

    en.wikipedia.org/wiki/D

    Unit prefix d, meaning one tenth. D is the grade below C but above E/F in the school grading system. D is the international vehicle registration code for Germany (also .de as its top-level domain). In Cantonese: Because the lack of Unicode CJK support in early computer systems, many Hong Kongers and Singaporeans used the capitalized D to ...