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- Symbol:Δ
- Name:Delta
- Unicode:
U+0394 (Capital), U+03B4 (lowercase) - HTML Entity:
Δ , δ - LaTeX:
\Delta , \delta
The Delta Symbol (Δ, δ) in Mathematics & Science
The Delta symbol (Δ, δ) is the fourth letter of the Greek alphabet. In math and science, Delta is the universal representation of change, variation, and small increments:
- Capital Delta (Δ): Signifies a difference or change in a variable (e.g., $\Delta x$ meaning change in $x$). It is also used to represent the discriminant in polynomial equations or Laplace operator.
- Lowercase Delta (δ): Denotes a small or infinitesimal change, Kronecker delta, Dirac delta function, or declination in astronomy.
How to Use and Copy the Delta Sign Online
You can copy the Delta symbol with one click using the copy button on the display card at the top. Alternatively, you can type delta or the LaTeX commands \Delta or \delta, or draw the symbol directly on our canvas to search for it.
Common Mathematical Equations Using Delta
Delta is heavily used in geometry, algebra, and calculus:
- Slope / Gradient: $m = \frac{\Delta y}{\Delta x}$ represents the rate of change.
- Discriminant: $\Delta = b^2 - 4ac$ determines the nature of quadratic roots.
- Dirac Delta Function: $\delta(x)$ which is zero everywhere except at $x=0$, with an integral of 1.
Explore Other Keyboard Tools
To type more mathematical symbols, constants, and operators, check out our collections: Math symbol keyboard, Physics constants keyboard, Chemistry formulas keyboard, Greek letters keyboard, Spanish accents keyboard, German QWERTZ keyboard, and French accents keyboard.
Frequently Asked Questions (FAQ)
What is the meaning of the Delta symbol (Δ/δ)?
Capital Delta (Δ) represents change, difference, or discriminant in math. Lowercase delta (δ) represents a small quantity, the Dirac delta function, or Kronecker delta.
How do I type the Delta symbol on a computer?
Type "\Delta" or "\delta" in LaTeX or MS Word. Use Alt + 235 on Windows for lowercase delta. On our tool, you can copy it or draw it.
What is the LaTeX code for Delta?
The LaTeX command for capital Delta is "\Delta" and for lowercase is "\delta".
What is the Unicode and HTML entity for Delta?
Capital Delta is U+0394 (Δ), and lowercase delta is U+03B4 (δ).