TeXipedia

vert

Represents a vertical bar or pipe symbol used for set-builder notation, absolute values, and conditional probability.

Overview

Essential in mathematical notation across multiple contexts, serving distinct purposes in different mathematical fields:

  • Functions as a delimiter in set-builder notation to specify conditions or constraints
  • Used to denote absolute value when paired as double bars
  • Appears in probability theory to indicate conditional statements
  • Common in linear algebra for matrix determinants
  • Serves as a separator in various mathematical expressions where vertical bars are syntactically meaningful

Examples

Set builder notation showing a set of numbers satisfying a condition.

S={xRx>0}S = \{x \in \mathbb{R} \vert x > 0\}
S = \{x \in \mathbb{R} \vert x > 0\}

Conditional probability notation.

P(AB)=P(AB)P(B)P(A \vert B) = \frac{P(A \cap B)}{P(B)}
P(A \vert B) = \frac{P(A \cap B)}{P(B)}

Function evaluation at a specific point.

f(x)x=2=4f(x) \vert_{x=2} = 4
f(x) \vert_{x=2} = 4