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2. Square (algebra) - Wikipedia

   en.wikipedia.org/wiki/Square_(algebra)

   5⋅5, or 5 2 (5 squared), can be shown graphically using a square. Each block represents one unit, 1⋅1, and the entire square represents 5⋅5, or the area of the square. In mathematics, a square is the result of multiplying a number by itself. The verb "to square" is used to denote this operation.

3. Missing square puzzle - Wikipedia

   en.wikipedia.org/wiki/Missing_square_puzzle

   However, the blue triangle has a ratio of 5:2 (=2.5), while the red triangle has the ratio 8:3 (≈2.667), so the apparent combined hypotenuse in each figure is actually bent. With the bent hypotenuse, the first figure actually occupies a combined 32 units, while the second figure occupies 33, including the "missing" square.

4. Glossary of mathematical symbols - Wikipedia

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

   Denotes square root and is read as the square root of. Rarely used in modern mathematics without a horizontal bar delimiting the width of its argument (see the next item). For example, √2. √ (radical symbol) 1. Denotes square root and is read as the square root of. For example, +. 2.

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6. Symbols of grouping - Wikipedia

   en.wikipedia.org/wiki/Symbols_of_grouping

   [2] A superscript is understood to be grouped as long as it continues in the form of a superscript. For example if an x has a superscript of the form a+b, the sum is the exponent. For example: x 2+3, it is understood that the 2+3 is grouped, and that the exponent is the sum of 2 and 3. These rules are understood by all mathematicians.

7. Fourth power - Wikipedia

   en.wikipedia.org/wiki/Fourth_power

   In arithmetic and algebra, the fourth power of a number n is the result of multiplying four instances of n together. So: n 4 = n × n × n × n. Fourth powers are also formed by multiplying a number by its cube. Furthermore, they are squares of squares.

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9. Pushout (category theory) - Wikipedia

   en.wikipedia.org/wiki/Pushout_(category_theory)

   The pushout consists of an object P along with two morphisms X → P and Y → P that complete a commutative square with the two given morphisms f and g. In fact, the defining universal property of the pushout (given below) essentially says that the pushout is the "most general" way to complete this commutative square.