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  2. Radical - Wikipedia

    en.wikipedia.org/wiki/Radical

    Radical expression involving roots, also known as an nth root; Radical symbol (√), used to indicate the square root and other roots; Radical of an algebraic group, a concept in algebraic group theory; Radical of an ideal, an important concept in abstract algebra; Radical of a ring, an ideal of "bad" elements of a ring

  3. Nested radical - Wikipedia

    en.wikipedia.org/wiki/Nested_radical

    In algebra, a nested radical is a radical expression (one containing a square root sign, cube root sign, etc.) that contains (nests) another radical expression ...

  4. nth root - Wikipedia

    en.wikipedia.org/wiki/Nth_root

    An unresolved root, especially one using the radical symbol, is sometimes referred to as a surd [2] or a radical. [3] Any expression containing a radical, whether it is a square root, a cube root, or a higher root, is called a radical expression, and if it contains no transcendental functions or transcendental numbers it is called an algebraic ...

  5. Radical symbol - Wikipedia

    en.wikipedia.org/wiki/Radical_symbol

    The symbol was first seen in print without the vinculum (the horizontal "bar" over the numbers inside the radical symbol) in the year 1525 in Die Coss by Christoff Rudolff, a German mathematician. In 1637 Descartes was the first to unite the German radical sign √ with the vinculum to create the radical symbol in common use today. [3]

  6. Radical (chemistry) - Wikipedia

    en.wikipedia.org/wiki/Radical_(chemistry)

    The hydroxyl radical, Lewis structure shown, contains one unpaired electron. Lewis dot structure of a Hydroxide ion compared to a hydroxyl radical. In chemistry, a radical, also known as a free radical, is an atom, molecule, or ion that has at least one unpaired valence electron.

  7. Square root - Wikipedia

    en.wikipedia.org/wiki/Square_root

    The radicand is the number or expression underneath the radical sign, in this case, 9. For non-negative x , the principal square root can also be written in exponent notation, as x 1 / 2 {\displaystyle x^{1/2}} .

  8. Root of unity - Wikipedia

    en.wikipedia.org/wiki/Root_of_unity

    Moreover, there exist more informative radical expressions for n th roots of unity with the additional property [12] that every value of the expression obtained by choosing values of the radicals (for example, signs of square roots) is a primitive n th root of unity. This was already shown by Gauss in 1797. [13]

  9. Expression (mathematics) - Wikipedia

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

    The radical symbol (√) ... A formal expression is a kind of string of symbols, created by the same production rules as standard expressions, however, ...