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2. Linear inequality - Wikipedia

   en.wikipedia.org/wiki/Linear_inequality

   Two-dimensional linear inequalities are expressions in two variables of the form: + < +, where the inequalities may either be strict or not. The solution set of such an inequality can be graphically represented by a half-plane (all the points on one "side" of a fixed line) in the Euclidean plane. [2]

3. Inequality (mathematics) - Wikipedia

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

   The feasible regions of linear programming are defined by a set of inequalities. In mathematics, an inequality is a relation which makes a non-equal comparison between two numbers or other mathematical expressions. [1] It is used most often to compare two numbers on the number line by their size.

4. Crossing number inequality - Wikipedia

   en.wikipedia.org/wiki/Crossing_number_inequality

   The crossing number inequality states that, for an undirected simple graph G with n vertices and e edges such that e > 7n, the crossing number cr(G) obeys the inequality ⁡ (). The constant 29 is the best known to date, and is due to Ackerman. [3]

5. Bernoulli's inequality - Wikipedia

   en.wikipedia.org/wiki/Bernoulli's_inequality

   In the first step we take =.In this case the inequality + + is obviously true.. In the second step we assume validity of the inequality for numbers and deduce validity for + numbers.

6. Jensen's inequality - Wikipedia

   en.wikipedia.org/wiki/Jensen's_inequality

   Jensen's inequality generalizes the statement that a secant line of a convex function lies above its graph. Visualizing convexity and Jensen's inequality. In mathematics, Jensen's inequality, named after the Danish mathematician Johan Jensen, relates the value of a convex function of an integral to the integral of the convex function.

7. List of inequalities - Wikipedia

   en.wikipedia.org/wiki/List_of_inequalities

   Bernstein inequalities (probability theory) Boole's inequality; Borell–TIS inequality; BRS-inequality; Burkholder's inequality; Burkholder–Davis–Gundy inequalities; Cantelli's inequality; Chebyshev's inequality; Chernoff's inequality; Chung–Erdős inequality; Concentration inequality; Cramér–Rao inequality; Doob's martingale inequality

8. Number line - Wikipedia

   en.wikipedia.org/wiki/Number_line

   The order of the natural numbers shown on the number line. A number line is a picture of a straight line that serves as spatial representation of numbers, usually graduated like a ruler with a particular origin point representing the number zero and evenly spaced marks in either direction representing integers, imagined to extend infinitely.

9. Crossing number (graph theory) - Wikipedia

   en.wikipedia.org/wiki/Crossing_number_(graph_theory)

   This is the minimum number of crossings among all drawings of this graph, so the graph has crossing number cr(G) = 3. In graph theory, the crossing number cr(G) of a graph G is the lowest number of edge crossings of a plane drawing of the graph G. For instance, a graph is planar if and only if its crossing number is zero. Determining the ...