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2. Interval (mathematics) - Wikipedia

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

   A closed interval is an interval that includes all its endpoints and is denoted with square brackets. [2] For example, [0, 1] means greater than or equal to 0 and less than or equal to 1 . Closed intervals have one of the following forms in which a and b are real numbers such that a ≤ b : {\displaystyle a\leq b\colon }

3. Template:Interval/doc - Wikipedia

   en.wikipedia.org/wiki/Template:Interval/doc

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4. List of trigonometric identities - Wikipedia

   en.wikipedia.org/wiki/List_of_trigonometric...

   Subtracting ⁡ from both sides and dividing by 2 by two yields the power-reduction formula for sine: ⁡ = (⁡ ()). The half-angle formula for sine can be obtained by replacing θ {\displaystyle \theta } with θ / 2 {\displaystyle \theta /2} and taking the square-root of both sides: sin ⁡ ( θ / 2 ) = ± ( 1 − cos ⁡ θ ) / 2 ...

5. List of logic symbols - Wikipedia

   en.wikipedia.org/wiki/List_of_logic_symbols

   (the symbol may also indicate the domain and codomain of a function; ... ÷ 2 = 2 ÷ 2 = 1, but 8 ÷ (4 ÷ 2) ... Used format for denoting Gödel numbers. Using HTML ...

6. Partition of an interval - Wikipedia

   en.wikipedia.org/wiki/Partition_of_an_interval

   A partition of an interval being used in a Riemann sum. The partition itself is shown in grey at the bottom, with the norm of the partition indicated in red. In mathematics, a partition of an interval [a, b] on the real line is a finite sequence x 0, x 1, x 2, …, x n of real numbers such that a = x 0 < x 1 < x 2 < … < x n = b.

7. Interval arithmetic - Wikipedia

   en.wikipedia.org/wiki/Interval_arithmetic

   An interval can be defined as a set of points within a specified distance of the center, and this definition can be extended from real numbers to complex numbers. [2] Another extension defines intervals as rectangles in the complex plane. As is the case with computing with real numbers, computing with complex numbers involves uncertain data.