Symbols Across Disciplines
Symbols are universal tools for communication in fields like mathematics, science, programming, and more. This guide catalogs key symbols with copy functionality and visualizations.
Mathematical Symbols
Core symbols for algebra, calculus, and geometry.
| Symbol | Name | Use | Copy |
|---|---|---|---|
| + | Plus | Addition (\( 2 + 3 = 5 \)) | |
| × | Times | Multiplication (\( 4 × 3 = 12 \)) | |
| = | Equals | Equality (\( 2 + 2 = 4 \)) | |
| ≠ | Not Equal | Inequality (\( 3 ≠ 5 \)) | |
| ∑ | Sigma | Summation (\( \sum_{i=1}^{n} i \)) | |
| ∫ | Integral | Integration (\( \int_a^b f(x) \, dx \)) | |
| π | Pi | Circle constant (~3.14159) | |
| ∈ | Element Of | Set membership (\( x ∈ A \)) |
Scientific Symbols
Symbols in physics, chemistry, and astronomy.
| Symbol | Name | Use | Copy |
|---|---|---|---|
| Δ | Delta | Change (\( \Delta T \)) | |
| λ | Lambda | Wavelength (\( \lambda = \frac{c}{f} \)) | |
| Ω | Omega | Resistance or angular velocity | |
| μ | Mu | Micro (10⁻⁶) or friction | |
| σ | Sigma | Stress or conductivity |
Programming Symbols
Symbols in Python, Java, C++, etc.
| Symbol | Name | Use | Copy |
|---|---|---|---|
| + | Plus | Addition or concatenation | |
| == | Equal | Equality check (if x == 5) | |
| ! | Not | Logical negation (!true) | |
| & | Ampersand | Bitwise AND or reference | |
| -> | Arrow | Function return type |
Logic Symbols
Symbols in formal logic.
| Symbol | Name | Use | Copy |
|---|---|---|---|
| ∧ | And | Logical conjunction (\( P ∧ Q \)) | |
| ∨ | Or | Logical disjunction (\( P ∨ Q \)) | |
| ¬ | Not | Logical negation (\( ¬P \)) | |
| ∀ | For All | Universal quantifier (\( ∀x \)) | |
| ∃ | Exists | Existential quantifier (\( ∃x \)) |
Engineering Symbols
Symbols in engineering disciplines.
| Symbol | Name | Use | Copy |
|---|---|---|---|
| σ | Sigma | Stress (\( \sigma = \frac{F}{A} \)) | |
| ε | Epsilon | Strain (\( \varepsilon = \frac{\Delta L}{L} \)) | |
| τ | Tau | Shear stress or torque | |
| ω | Omega | Angular velocity | |
| η | Eta | Efficiency (\( \eta = \frac{P_{out}}{P_{in}} \)) |
Linguistics Symbols
Phonetic and syntactic symbols (e.g., IPA).
| Symbol | Name | Use | Copy |
|---|---|---|---|
| ə | Schwa | Mid-central vowel ("about") | |
| ʃ | Esh | Voiceless fricative ("ship") | |
| ŋ | Eng | Velar nasal ("sing") | |
| ˈ | Primary Stress | Stress marker (/ˈkæt/) | |
| ʔ | Glottal Stop | Glottal stop ("uh-oh") |
Statistics Symbols
Symbols in probability and statistics.
| Symbol | Name | Use | Copy |
|---|---|---|---|
| μ | Mu | Population mean | |
| σ | Sigma | Population standard deviation | |
| x̄ | X-bar | Sample mean | |
| ρ | Rho | Correlation coefficient | |
| χ² | Chi-squared | Chi-squared test statistic |
Visualizations
Distribution of symbols across disciplines.