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Equality and Inference Symbols in LaTeX

Last Updated : 15 Jul, 2025

LaTeX is a typesetting system widely used for mathematical and scientific documents. One of its strengths is the ability to render complex mathematical symbols and notations effortlessly. This article focuses on the equality and inference symbols in LaTeX, providing a comprehensive guide on how to use them effectively.

  • Equality and Inference symbols are used to denote some relation between two physical quantities, numbers, sets, figures, or any two things. For example, we use = when two things are equal else we use ≠ .
  • We cannot use our keyboard to write these symbols directly as these are not present on our keyboard. So we need LATex code to write them. Include \usepackage{amssymb} to use this notation. 

Equality and Inference Symbols and their LaTex Code

TERMSYMBOLLATEX
Not equal to\neq
Similar to\sim
Dot equivalent\doteq
Triangle Equivalent\triangleq
Thick similar to\thicksim
Divide\div
Equivalent\equiv
Dot equivalent\doteq
Circle equivalent\circeq
Not similar to\nsim
Equality with a circle in between\eqcirc
Thick approximate\thickapprox
Falling Dots Equivalent\fallingdotseq
Similar equal to\simeq
Bump Equivalent\bumpeq
Approximate\approx
Rising Dots Equivalent\risingdotseq
Double Bump Equivalent\Bumpeq
Approximately equal to\approxeq
Asymptotic\asymp
Mid\mid
Parallel\parallel
Not mid\nmid
Not parallel to\nparallel
Short mid\shortmid
Short parallel to\shortparallel
short not mid\nshortmid
Short not parallel to\nshortparallel
Models\models
Congruent to\cong
Not Congruent to\ncong

Applications of Equality and Inference Symbols in Engineering

1. Circuit Design: In electrical engineering, equality symbols are used to represent equations that describe circuit behaviors. Inference symbols help in logical reasoning for circuit analysis.

2. Control Systems: Equality and inference symbols are crucial in control systems engineering for formulating system equations and logical conditions for system stability and performance.

3. Structural Analysis: Structural engineers use equality symbols to denote equilibrium equations, while inference symbols are used in logical reasoning about load distribution and structural integrity.

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